third-party-web

Third Party Web

Check out the shiny new web UI https://www.thirdpartyweb.today/

Data on third party entities and their impact on the web.

This document is a summary of which third party scripts are most responsible for excessive JavaScript execution on the web today.

Table of Contents

1. Goals
2. Methodology
3. NPM Module
4. Updates
5. Data
   1. Summary
   2. How to Interpret
   3. Third Parties by Category
      1. Advertising
      2. Analytics
      3. Social
      4. Video
      5. Developer Utilities
      6. Hosting Platforms
      7. Marketing
      8. Customer Success
      9. Content & Publishing
      10. CDNs
      11. Tag Management
      12. Mixed / Other
   4. Third Parties by Total Impact
6. Future Work
7. FAQs
8. Contributing

Goals

1. Quantify the impact of third party scripts on the web.
2. Identify the third party scripts on the web that have the greatest performance cost.
3. Give developers the information they need to make informed decisions about which third parties to include on their sites.
4. Incentivize responsible third party script behavior.
5. Make this information accessible and useful.

Methodology

HTTP Archive is an inititiave that tracks how the web is built. Every month, ~4 million sites are crawled with Lighthouse on mobile. Lighthouse breaks down the total script execution time of each page and attributes the execution to a URL. Using BigQuery, this project aggregates the script execution to the origin-level and assigns each origin to the responsible entity.

NPM Module

The entity classification data is available as an NPM module.

const {getEntity} = require('third-party-web')
const entity = getEntity('https://d36mpcpuzc4ztk.cloudfront.net/js/visitor.js')
console.log(entity)
//   {
//     "name": "Freshdesk",
//     "homepage": "https://freshdesk.com/",
//     "categories": ["customer-success"],
//     "domains": ["d36mpcpuzc4ztk.cloudfront.net"]
//   }

Updates

2019-02-01 dataset

Huge props to WordAds for reducing their impact from ~2.5s to ~200ms on average! A few entities are showing considerably less data this cycle (Media Math, Crazy Egg, DoubleVerify, Bootstrap CDN). Perhaps they've added new CDNs/hostnames that we haven't identified or the basket of sites in HTTPArchive has shifted away from their usage.

2019-03-01 dataset

Almost 2,000 entities tracked now across ~3,000+ domains! Huge props to @simonhearne for making this massive increase possible. Tag Managers have now been split out into their own category since they represented such a large percentage of the "Mixed / Other" category.

2019-05-06 dataset

Google Ads clarified that www.googletagservices.com serves more ad scripts than generic tag management, and it has been reclassified accordingly. This has dropped the overall Tag Management share considerably back down to its earlier position.

2019-05-13 dataset

A shortcoming of the attribution approach has been fixed. Total usage is now reported based on the number of pages in the dataset that use the third-party, not the number of scripts. Correspondingly, all average impact times are now reported per page rather than per script. Previously, a third party could appear to have a lower impact or be more popular simply by splitting their work across multiple files.

Third-parties that performed most of their work from a single script should see little to no impact from this change, but some entities have seen significant ranking movement. Hosting providers that host entire pages are, understandably, the most affected.

Some notable changes below:

Third-Party	Previously (per-script)	Now (per-page)
Beeketing	137 ms	465 ms
Sumo	263 ms	798 ms
Tumblr	324 ms	1499 ms
Yandex APIs	393 ms	1231 ms
Google Ads	402 ms	1285 ms
Wix	972 ms	5393 ms

Data

Summary

Across top ~4 million sites, ~2700 origins account for ~57% of all script execution time with the top 50 entities already accounting for ~47%. Third party script execution is the majority chunk of the web today, and it's important to make informed choices.

How to Interpret

Each entity has a number of data points available.

1. Usage (Total Number of Occurrences) - how many scripts from their origins were included on pages
2. Total Impact (Total Execution Time) - how many seconds were spent executing their scripts across the web
3. Average Impact (Average Execution Time) - on average, how many milliseconds were spent executing each script
4. Category - what type of script is this

Third Parties by Category

This section breaks down third parties by category. The third parties in each category are ranked from first to last based on the average impact of their scripts. Perhaps the most important comparisons lie here. You always need to pick an analytics provider, but at least you can pick the most well-behaved analytics provider.

Overall Breakdown

Unsurprisingly, ads account for the largest identifiable chunk of third party script execution.

Advertising

These scripts are part of advertising networks, either serving or measuring.

Rank	Name	Usage	Average Impact
1	Nend	1,713	40 ms
2	ExoClick	4,263	56 ms
3	Elastic Ad	1,762	63 ms
4	fluct	4,240	64 ms
5	MailMunch	9,263	65 ms
6	Affiliate Window	1,849	68 ms
7	CleverDATA	1,197	71 ms
8	FreakOut	7,279	72 ms
9	Adyoulike	2,750	74 ms
10	Tradelab	1,240	75 ms
11	BlueKai	11,372	75 ms
12	Tail Target	2,217	76 ms
13	District M	19,216	76 ms
14	Rakuten Marketing	2,977	77 ms
15	Tynt	52,237	80 ms
16	Geniee	1,256	81 ms
17	Constant Contact	3,036	83 ms
18	GetResponse	1,535	84 ms
19	Crowd Control	4,505	85 ms
20	PushCrew	7,655	85 ms
21	Effective Measure	1,024	85 ms
22	The Trade Desk	1,142	86 ms
23	LinkedIn Ads	1,220	86 ms
24	Autopilot	1,314	87 ms
25	Rocket Fuel	1,322	89 ms
26	Outbrain	9,003	89 ms
27	Gemius	15,970	90 ms
28	F@N Communications	1,216	90 ms
29	Scorecard Research	56,910	91 ms
30	Nativo	1,140	92 ms
31	DialogTech	1,751	94 ms
32	OwnerIQ	1,476	97 ms
33	Unbounce	5,583	104 ms
34	Amazon Ads	37,633	105 ms
35	Pubmatic	239,535	107 ms
36	DTSCOUT	10,470	107 ms
37	Refersion	2,484	108 ms
38	AudienceSearch	1,355	108 ms
39	Adroll	5,475	112 ms
40	plista	1,488	116 ms
41	Popads	7,435	117 ms
42	Sharethrough	4,307	118 ms
43	Rubicon Project	64,786	120 ms
44	Smart AdServer	4,855	121 ms
45	rewardStyle.com	1,165	121 ms
46	JuicyAds	4,980	121 ms
47	Permutive	1,172	124 ms
48	OptiMonk	2,755	126 ms
49	Lytics	1,255	128 ms
50	Bizible	2,050	139 ms
51	Yahoo!	42,141	139 ms
52	Skimbit	37,640	140 ms
53	Bridgewell DSP	72,535	142 ms
54	Bing Ads	31,774	149 ms
55	DMD Marketing	1,311	151 ms
56	Digital ad Consortium	5,737	152 ms
57	AOL / Oath / Verizon Media	3,688	157 ms
58	Criteo	178,755	157 ms
59	RevJet	5,763	160 ms
60	Media Math	3,427	162 ms
61	Media.net	53,308	168 ms
62	SmartAdServer	5,903	169 ms
63	Teads	16,806	172 ms
64	Adform	37,341	180 ms
65	sovrn	7,038	184 ms
66	Cxense	8,958	184 ms
67	TrafficStars	3,973	186 ms
68	eBay	1,585	187 ms
69	Adocean	2,378	188 ms
70	IPONWEB	1,728	190 ms
71	Adverline Board	2,345	193 ms
72	Index Exchange	6,240	206 ms
73	Smarter Click	1,093	207 ms
74	Sortable	2,729	210 ms
75	Celtra	1,384	211 ms
76	Snacktools	1,598	211 ms
77	Auto Link Maker	2,421	223 ms
78	Taboola	43,546	223 ms
79	Branch Metrics	2,076	226 ms
80	Perfect Market	1,829	232 ms
81	VigLink	16,444	238 ms
82	LongTail Ad Solutions	8,052	240 ms
83	Infolinks	7,283	248 ms
84	MGID	18,885	249 ms
85	One by AOL	3,525	255 ms
86	Klaviyo	21,188	258 ms
87	WordAds	47,149	265 ms
88	OpenX	13,508	266 ms
89	Privy	24,476	270 ms
90	GumGum	5,832	275 ms
91	Adloox	7,979	276 ms
92	piano	1,739	286 ms
93	Intent Media	4,506	286 ms
94	Market GID	2,072	288 ms
95	Adnium	3,882	290 ms
96	AppNexus	55,728	296 ms
97	Between Digital	2,337	304 ms
98	33 Across	16,956	338 ms
99	Neodata	2,708	344 ms
100	iBillboard	3,754	348 ms
101	Sizmek	13,924	361 ms
102	Polar	1,353	371 ms
103	Yieldmo	3,013	381 ms
104	Digioh	2,150	390 ms
105	BannerFlow	8,849	392 ms
106	Media Management Technologies	1,349	395 ms
107	Technorati	1,091	408 ms
108	DoubleVerify	25,251	426 ms
109	MediaVine	14,060	429 ms
110	Integral Ad Science	62,677	431 ms
111	Tribal Fusion	3,706	438 ms
112	Google/Doubleclick Ads	3,531,833	459 ms
113	Simplicity Marketing	6,128	464 ms
114	Admixer for Publishers	3,289	473 ms
115	Yandex Ads	24,094	476 ms
116	Ooyala	1,360	502 ms
117	Vidible	4,406	549 ms
118	Meetrics	1,623	582 ms
119	LoyaltyLion	3,047	606 ms
120	Yieldify	1,835	667 ms
121	AdMatic	4,062	710 ms
122	Moat	41,664	834 ms
123	AdScore	2,654	860 ms
124	Supership	1,128	1034 ms
125	LKQD	4,733	1048 ms
126	fam	5,032	1325 ms
127	StickyADS.tv	7,693	1393 ms

Analytics

These scripts measure or track users and their actions. There's a wide range in impact here depending on what's being tracked.

Rank	Name	Usage	Average Impact
1	Alexa	2,350	55 ms
2	WordPress Site Stats	10,174	64 ms
3	Roxr Software	4,804	69 ms
4	Treasure Data	11,283	70 ms
5	StatCounter	16,374	72 ms
6	Amplitude Mobile Analytics	5,400	74 ms
7	Searchanise	4,750	75 ms
8	Heap	4,211	78 ms
9	Quantcast	6,563	78 ms
10	Mixpanel	13,179	80 ms
11	Chartbeat	13,104	80 ms
12	Google Analytics	2,509,867	81 ms
13	Hotjar	286,465	91 ms
14	Smart Insight Tracking	1,467	92 ms
15	Radar	1,357	93 ms
16	Usabilla	1,611	96 ms
17	etracker	3,877	100 ms
18	CallRail	13,947	106 ms
19	Marchex	8,566	109 ms
20	ContentSquare	2,288	109 ms
21	Nielsen NetRatings SiteCensus	24,220	111 ms
22	Parse.ly	6,259	111 ms
23	Snowplow	6,077	114 ms
24	Baidu Analytics	27,003	119 ms
25	Crazy Egg	28,656	122 ms
26	Picreel	1,042	128 ms
27	VWO	11,885	131 ms
28	Survicate	1,142	133 ms
29	Net Reviews	5,520	136 ms
30	Convert Insights	1,968	136 ms
31	Nosto	5,112	142 ms
32	BounceX	2,744	150 ms
33	Marketo	2,516	150 ms
34	Monetate	1,932	153 ms
35	PowerReviews	1,342	161 ms
36	Kampyle	1,360	163 ms
37	Trust Pilot	30,441	167 ms
38	Evidon	15,544	168 ms
39	Mather Economics	1,496	169 ms
40	Gigya	7,027	178 ms
41	ForeSee	4,507	185 ms
42	DigiTrust	8,804	188 ms
43	Segment	19,443	192 ms
44	Clicktale	3,814	193 ms
45	FullStory	12,228	219 ms
46	Maxymiser	2,539	234 ms
47	Clerk.io ApS	1,678	242 ms
48	UserReport	2,659	243 ms
49	Bazaarvoice	4,825	265 ms
50	mPulse	22,192	273 ms
51	Ezoic	7,870	282 ms
52	Optimizely	24,691	305 ms
53	Keen	5,043	311 ms
54	Histats	28,082	337 ms
55	Feefo.com	4,355	367 ms
56	Reviews.co.uk	1,197	367 ms
57	Inspectlet	11,796	396 ms
58	Decibel Insight	1,116	414 ms
59	TrackJS	1,660	423 ms
60	Snapchat	16,476	427 ms
61	SessionCam	3,128	467 ms
62	Lucky Orange	15,254	501 ms
63	Yandex Metrica	497,461	506 ms
64	Mouseflow	3,345	618 ms
65	Revolver Maps	1,558	644 ms
66	IBM Digital Analytics	1,812	709 ms
67	AB Tasty	6,661	732 ms
68	Salesforce	101,775	951 ms

Social

These scripts enable social features.

Rank	Name	Usage	Average Impact
1	VK	54,057	59 ms
2	Micropat	48,427	74 ms
3	Shareaholic	9,532	88 ms
4	Kakao	23,274	94 ms
5	Pinterest	31,567	107 ms
6	LinkedIn	33,425	110 ms
7	Twitter	535,642	129 ms
8	AddShoppers	1,100	133 ms
9	Yandex Share	93,048	141 ms
10	Instagram	18,393	143 ms
11	Facebook	3,590,088	161 ms
12	ShareThis	88,885	233 ms
13	Stackla PTY	1,307	311 ms
14	AddThis	378,302	328 ms
15	SocialShopWave	2,855	434 ms
16	Disqus	5,702	529 ms
17	Pixlee	1,588	535 ms
18	PIXNET	113,430	619 ms
19	Tumblr	49,240	715 ms
20	LiveJournal	10,451	1057 ms

Video

These scripts enable video player and streaming functionality.

Rank	Name	Usage	Average Impact
1	Vimeo	70,542	477 ms
2	Wistia	44,577	523 ms
3	Twitch	3,058	651 ms
4	Brightcove	12,629	697 ms
5	YouTube	1,215,399	700 ms

Developer Utilities

These scripts are developer utilities (API clients, site monitoring, fraud detection, etc).

Rank	Name	Usage	Average Impact
1	Trusted Shops	3,829	39 ms
2	LightWidget	5,623	65 ms
3	Riskified	1,038	71 ms
4	Symantec	2,348	78 ms
5	Optanon	1,931	78 ms
6	OneSignal	40,889	79 ms
7	GetSiteControl	3,473	86 ms
8	iubenda	26,534	88 ms
9	Siteimprove	3,278	89 ms
10	TRUSTe	1,917	90 ms
11	New Relic	11,813	93 ms
12	Cookiebot	22,102	102 ms
13	iovation	2,215	103 ms
14	Other Google APIs/SDKs	1,144,404	120 ms
15	Github	1,115	125 ms
16	Bold Commerce	22,797	129 ms
17	AppDynamics	3,118	137 ms
18	AddEvent	1,395	143 ms
19	Sift Science	3,432	146 ms
20	Forensiq	2,038	154 ms
21	Amazon Pay	27,030	156 ms
22	MaxCDN Enterprise	5,000	166 ms
23	Swiftype	2,941	169 ms
24	Shopgate	1,228	178 ms
25	Po.st	2,418	185 ms
26	TrustArc	17,277	191 ms
27	Google Maps	1,029,420	202 ms
28	Fraudlogix	1,641	216 ms
29	Seznam	3,966	219 ms
30	WisePops	1,062	234 ms
31	Affirm	2,742	251 ms
32	GitHub	2,469	278 ms
33	Cloudflare	27,866	302 ms
34	Fastly	9,893	302 ms
35	Stripe	40,199	320 ms
36	PayPal	30,278	323 ms
37	Rambler	17,774	335 ms
38	Distil Networks	21,147	344 ms
39	GoDaddy	25,895	369 ms
40	Secomapp	2,606	387 ms
41	Datacamp	26,376	408 ms
42	Vidyard	1,532	422 ms
43	Sentry	21,759	425 ms
44	Bugsnag	2,323	461 ms
45	Okas Concepts	1,903	737 ms
46	Yandex APIs	24,628	1105 ms
47	Mapbox	9,933	1170 ms
48	Esri ArcGIS	4,593	1624 ms
49	Blindado	1,567	1915 ms

Hosting Platforms

These scripts are from web hosting platforms (WordPress, Wix, Squarespace, etc). Note that in this category, this can sometimes be the entirety of script on the page, and so the "impact" rank might be misleading. In the case of WordPress, this just indicates the libraries hosted and served by WordPress not all sites using self-hosted WordPress.

Rank	Name	Usage	Average Impact
1	WordPress	267,613	190 ms
2	Rackspace	1,381	284 ms
3	Shopify	359,922	293 ms
4	Dealer	51,793	298 ms
5	Salesforce Commerce Cloud	4,380	370 ms
6	Blogger	69,145	404 ms
7	CDK Dealer Management	17,453	481 ms
8	Ecwid	1,811	496 ms
9	Squarespace	163,470	514 ms
10	Weebly	69,962	563 ms
11	Hatena Blog	102,990	609 ms
12	Adobe Business Catalyst	5,333	1050 ms
13	Wix	488,005	1104 ms
14	WebsiteBuilder.com	1,422	3136 ms

Marketing

These scripts are from marketing tools that add popups/newsletters/etc.

Rank	Name	Usage	Average Impact
1	iZooto	1,400	70 ms
2	RD Station	3,542	71 ms
3	Madison Logic	1,260	86 ms
4	Dataxu	11,295	97 ms
5	Beeketing	46,576	107 ms
6	Bronto Software	1,864	115 ms
7	Listrak	2,153	124 ms
8	Hubspot	52,412	140 ms
9	Ve	6,509	145 ms
10	Mailchimp	51,011	156 ms
11	Yotpo	24,868	216 ms
12	OptinMonster	16,882	243 ms
13	Sumo	86,955	322 ms
14	Drift	29,364	364 ms
15	Bigcommerce	25,497	422 ms
16	Pardot	2,500	432 ms
17	Wishpond Technologies	1,363	446 ms
18	Albacross	3,842	679 ms
19	Tray Commerce	9,418	1176 ms
20	PureCars	5,103	1962 ms

Customer Success

These scripts are from customer support/marketing providers that offer chat and contact solutions. These scripts are generally heavier in weight.

Rank	Name	Usage	Average Impact
1	SnapEngage	2,138	62 ms
2	ClickDesk	1,234	75 ms
3	Foursixty	2,510	86 ms
4	iPerceptions	4,165	98 ms
5	LivePerson	9,838	103 ms
6	Comm100	3,177	119 ms
7	WebEngage	1,277	134 ms
8	Pure Chat	8,189	143 ms
9	iAdvize SAS	3,652	143 ms
10	ContactAtOnce	10,595	215 ms
11	LiveChat	53,109	252 ms
12	Tawk.to	108,512	314 ms
13	Tidio Live Chat	17,081	329 ms
14	Jivochat	61,315	353 ms
15	Olark	24,902	365 ms
16	Intercom	35,357	372 ms
17	Help Scout	2,884	377 ms
18	LiveTex	7,185	408 ms
19	ZenDesk	175,823	518 ms
20	Dynamic Yield	2,637	622 ms

Content & Publishing

These scripts are from content providers or publishing-specific affiliate tracking.

Rank	Name	Usage	Average Impact
1	Accuweather	3,088	69 ms
2	Clicktripz	6,194	83 ms
3	Adobe Scene7	1,234	83 ms
4	Covert Pics	1,021	106 ms
5	CPEx	1,759	113 ms
6	Revcontent	1,233	115 ms
7	Tencent	2,445	117 ms
8	OpenTable	5,458	145 ms
9	SnapWidget	7,989	147 ms
10	Booking.com	5,723	147 ms
11	Cloudinary	1,043	188 ms
12	Medium	4,756	229 ms
13	AMP	133,133	247 ms
14	Vox Media	1,431	265 ms
15	Embedly	8,268	488 ms
16	issuu	6,457	491 ms
17	Spotify	5,243	500 ms
18	Dailymotion	5,365	519 ms
19	SoundCloud	9,106	858 ms
20	Hotmart	2,788	875 ms
21	Kaltura Video Platform	1,634	982 ms

CDNs

These are a mixture of publicly hosted open source libraries (e.g. jQuery) served over different public CDNs and private CDN usage. This category is unique in that the origin may have no responsibility for the performance of what's being served. Note that rank here does not imply one CDN is better than the other. It simply indicates that the scripts being served from that origin are lighter/heavier than the ones served by another.

Rank	Name	Usage	Average Impact
1	Bootstrap CDN	2,849	59 ms
2	Adobe TypeKit	20,723	94 ms
3	Microsoft Hosted Libs	11,263	166 ms
4	Yandex CDN	3,636	176 ms
5	jQuery CDN	343,212	195 ms
6	Google CDN	1,094,288	222 ms
7	FontAwesome CDN	56,240	228 ms
8	Unpkg	8,489	244 ms
9	Akamai	24,867	260 ms
10	Azure Web Services	13,035	263 ms
11	Cloudflare CDN	219,769	273 ms
12	JSDelivr CDN	64,286	355 ms
13	Fort Awesome	1,774	531 ms
14	Monotype	10,906	691 ms
15	CreateJS CDN	13,015	2853 ms

Tag Management

These scripts tend to load lots of other scripts and initiate many tasks.

Rank	Name	Usage	Average Impact
1	BrightTag / Signal	23,136	94 ms
2	TagCommander	2,803	119 ms
3	Google Tag Manager	1,199,366	141 ms
4	Opentag	1,987	205 ms
5	Adobe Tag Manager	74,192	243 ms
6	Tealium	30,953	252 ms
7	Ensighten	14,717	310 ms

Mixed / Other

These are miscellaneous scripts delivered via a shared origin with no precise category or attribution. Help us out by identifying more origins!

Rank	Name	Usage	Average Impact
1	Skype	1,705	143 ms
2	Amazon Web Services	80,948	153 ms
3	All Other 3rd Parties	1,421,438	246 ms
4	Pagely	1,828	251 ms
5	ResponsiveVoice	2,296	302 ms
6	Parking Crew	6,550	483 ms
7	uLogin	4,862	1139 ms

Third Parties by Total Impact

This section highlights the entities responsible for the most script execution across the web. This helps inform which improvements would have the largest total impact.

Name	Popularity	Total Impact	Average Impact
Google/Doubleclick Ads	3,531,833	1,621,163 s	459 ms
YouTube	1,215,399	851,147 s	700 ms
Facebook	3,590,088	578,109 s	161 ms
Wix	488,005	538,579 s	1104 ms
All Other 3rd Parties	1,421,438	349,368 s	246 ms
Yandex Metrica	497,461	251,897 s	506 ms
Google CDN	1,094,288	242,755 s	222 ms
Google Maps	1,029,420	207,618 s	202 ms
Google Analytics	2,509,867	202,171 s	81 ms
Google Tag Manager	1,199,366	169,474 s	141 ms
Other Google APIs/SDKs	1,144,404	137,524 s	120 ms
AddThis	378,302	123,970 s	328 ms
Shopify	359,922	105,346 s	293 ms
Salesforce	101,775	96,802 s	951 ms
ZenDesk	175,823	91,048 s	518 ms
Squarespace	163,470	83,977 s	514 ms
PIXNET	113,430	70,177 s	619 ms
Twitter	535,642	69,190 s	129 ms
jQuery CDN	343,212	67,062 s	195 ms
Hatena Blog	102,990	62,680 s	609 ms
Cloudflare CDN	219,769	60,094 s	273 ms
WordPress	267,613	50,940 s	190 ms
Weebly	69,962	39,402 s	563 ms
CreateJS CDN	13,015	37,128 s	2853 ms
Tumblr	49,240	35,194 s	715 ms
Moat	41,664	34,732 s	834 ms
Tawk.to	108,512	34,118 s	314 ms
Vimeo	70,542	33,641 s	477 ms
AMP	133,133	32,887 s	247 ms
Criteo	178,755	28,095 s	157 ms
Sumo	86,955	27,982 s	322 ms
Blogger	69,145	27,950 s	404 ms
Yandex APIs	24,628	27,215 s	1105 ms
Integral Ad Science	62,677	27,041 s	431 ms
Hotjar	286,465	25,950 s	91 ms
Pubmatic	239,535	25,544 s	107 ms
Wistia	44,577	23,321 s	523 ms
JSDelivr CDN	64,286	22,848 s	355 ms
Jivochat	61,315	21,637 s	353 ms
ShareThis	88,885	20,692 s	233 ms
Wicked Reports	640	19,323 s	30193 ms
Adobe Tag Manager	74,192	18,054 s	243 ms
AppNexus	55,728	16,496 s	296 ms
Dealer	51,793	15,445 s	298 ms
LiveChat	53,109	13,371 s	252 ms
Intercom	35,357	13,155 s	372 ms
Yandex Share	93,048	13,084 s	141 ms
Stripe	40,199	12,856 s	320 ms
FontAwesome CDN	56,240	12,847 s	228 ms
WordAds	47,149	12,510 s	265 ms
Amazon Web Services	80,948	12,399 s	153 ms
Mapbox	9,933	11,619 s	1170 ms
Yandex Ads	24,094	11,457 s	476 ms
Tray Commerce	9,418	11,073 s	1176 ms
LiveJournal	10,451	11,050 s	1057 ms
Bigcommerce	25,497	10,772 s	422 ms
Datacamp	26,376	10,763 s	408 ms
DoubleVerify	25,251	10,751 s	426 ms
StickyADS.tv	7,693	10,713 s	1393 ms
Drift	29,364	10,674 s	364 ms
Bridgewell DSP	72,535	10,270 s	142 ms
PureCars	5,103	10,010 s	1962 ms
PayPal	30,278	9,792 s	323 ms
Taboola	43,546	9,708 s	223 ms
GoDaddy	25,895	9,552 s	369 ms
Histats	28,082	9,475 s	337 ms
Sentry	21,759	9,243 s	425 ms
Olark	24,902	9,089 s	365 ms
Media.net	53,308	8,955 s	168 ms
Brightcove	12,629	8,801 s	697 ms
Cloudflare	27,866	8,411 s	302 ms
CDK Dealer Management	17,453	8,390 s	481 ms
Mailchimp	51,011	7,942 s	156 ms
Tealium	30,953	7,813 s	252 ms
SoundCloud	9,106	7,810 s	858 ms
Rubicon Project	64,786	7,785 s	120 ms
Lucky Orange	15,254	7,647 s	501 ms
Monotype	10,906	7,535 s	691 ms
Optimizely	24,691	7,527 s	305 ms
Esri ArcGIS	4,593	7,459 s	1624 ms
Hubspot	52,412	7,329 s	140 ms
Distil Networks	21,147	7,281 s	344 ms
Snapchat	16,476	7,038 s	427 ms
Adform	37,341	6,739 s	180 ms
fam	5,032	6,670 s	1325 ms
Privy	24,476	6,606 s	270 ms
Akamai	24,867	6,456 s	260 ms
mPulse	22,192	6,064 s	273 ms
MediaVine	14,060	6,025 s	429 ms
Rambler	17,774	5,960 s	335 ms
Yahoo!	42,141	5,872 s	139 ms
33 Across	16,956	5,723 s	338 ms
Tidio Live Chat	17,081	5,628 s	329 ms
Adobe Business Catalyst	5,333	5,598 s	1050 ms
uLogin	4,862	5,538 s	1139 ms
Klaviyo	21,188	5,477 s	258 ms
Yotpo	24,868	5,360 s	216 ms
Skimbit	37,640	5,270 s	140 ms
Scorecard Research	56,910	5,174 s	91 ms
Trust Pilot	30,441	5,078 s	167 ms
Sizmek	13,924	5,032 s	361 ms
Beeketing	46,576	4,972 s	107 ms
LKQD	4,733	4,961 s	1048 ms
AB Tasty	6,661	4,876 s	732 ms
Bing Ads	31,774	4,731 s	149 ms
MGID	18,885	4,703 s	249 ms
Inspectlet	11,796	4,667 s	396 ms
Ensighten	14,717	4,561 s	310 ms
WebsiteBuilder.com	1,422	4,460 s	3136 ms
Amazon Pay	27,030	4,215 s	156 ms
Tynt	52,237	4,184 s	80 ms
OptinMonster	16,882	4,104 s	243 ms
Embedly	8,268	4,038 s	488 ms
Amazon Ads	37,633	3,950 s	105 ms
VigLink	16,444	3,910 s	238 ms
Segment	19,443	3,731 s	192 ms
LinkedIn	33,425	3,690 s	110 ms
OpenX	13,508	3,596 s	266 ms
Micropat	48,427	3,583 s	74 ms
Crazy Egg	28,656	3,500 s	122 ms
BannerFlow	8,849	3,467 s	392 ms
Azure Web Services	13,035	3,429 s	263 ms
Pinterest	31,567	3,377 s	107 ms
TrustArc	17,277	3,294 s	191 ms
OneSignal	40,889	3,245 s	79 ms
Baidu Analytics	27,003	3,219 s	119 ms
VK	54,057	3,215 s	59 ms
issuu	6,457	3,169 s	491 ms
Parking Crew	6,550	3,165 s	483 ms
Disqus	5,702	3,017 s	529 ms
Blindado	1,567	3,001 s	1915 ms
Fastly	9,893	2,987 s	302 ms
LiveTex	7,185	2,934 s	408 ms
Bold Commerce	22,797	2,931 s	129 ms
Teads	16,806	2,887 s	172 ms
AdMatic	4,062	2,882 s	710 ms
Simplicity Marketing	6,128	2,841 s	464 ms
Dailymotion	5,365	2,782 s	519 ms
Nielsen NetRatings SiteCensus	24,220	2,688 s	111 ms
FullStory	12,228	2,674 s	219 ms
Instagram	18,393	2,638 s	143 ms
Spotify	5,243	2,622 s	500 ms
Evidon	15,544	2,614 s	168 ms
Albacross	3,842	2,609 s	679 ms
Hotmart	2,788	2,441 s	875 ms
Vidible	4,406	2,418 s	549 ms
iubenda	26,534	2,323 s	88 ms
AdScore	2,654	2,281 s	860 ms
ContactAtOnce	10,595	2,276 s	215 ms
Cookiebot	22,102	2,252 s	102 ms
Ezoic	7,870	2,217 s	282 ms
Adloox	7,979	2,199 s	276 ms
BrightTag / Signal	23,136	2,184 s	94 ms
Kakao	23,274	2,181 s	94 ms
Unpkg	8,489	2,070 s	244 ms
Mouseflow	3,345	2,066 s	618 ms
Twitch	3,058	1,989 s	651 ms
Adobe TypeKit	20,723	1,941 s	94 ms
LongTail Ad Solutions	8,052	1,936 s	240 ms
Microsoft Hosted Libs	11,263	1,866 s	166 ms
LoyaltyLion	3,047	1,847 s	606 ms
Infolinks	7,283	1,806 s	248 ms
DigiTrust	8,804	1,657 s	188 ms
Cxense	8,958	1,647 s	184 ms
Dynamic Yield	2,637	1,640 s	622 ms
Tribal Fusion	3,706	1,625 s	438 ms
Salesforce Commerce Cloud	4,380	1,619 s	370 ms
Kaltura Video Platform	1,634	1,605 s	982 ms
GumGum	5,832	1,601 s	275 ms
Feefo.com	4,355	1,596 s	367 ms
Opta	874	1,581 s	1809 ms
Keen	5,043	1,567 s	311 ms
Admixer for Publishers	3,289	1,557 s	473 ms
VWO	11,885	1,552 s	131 ms
CallRail	13,947	1,481 s	106 ms
District M	19,216	1,466 s	76 ms
SessionCam	3,128	1,462 s	467 ms
Gemius	15,970	1,436 s	90 ms
Okas Concepts	1,903	1,402 s	737 ms
iBillboard	3,754	1,307 s	348 ms
sovrn	7,038	1,291 s	184 ms
Intent Media	4,506	1,290 s	286 ms
IBM Digital Analytics	1,812	1,285 s	709 ms
Index Exchange	6,240	1,282 s	206 ms
Bazaarvoice	4,825	1,278 s	265 ms
Gigya	7,027	1,248 s	178 ms
SocialShopWave	2,855	1,238 s	434 ms
Yieldify	1,835	1,224 s	667 ms
WebpageFX	911	1,215 s	1334 ms
StatCounter	16,374	1,183 s	72 ms
SnapWidget	7,989	1,171 s	147 ms
Pure Chat	8,189	1,170 s	143 ms
Supership	1,128	1,167 s	1034 ms
Yieldmo	3,013	1,147 s	381 ms
Adnium	3,882	1,127 s	290 ms
DTSCOUT	10,470	1,121 s	107 ms
Dataxu	11,295	1,100 s	97 ms
New Relic	11,813	1,099 s	93 ms
Medium	4,756	1,091 s	229 ms
Help Scout	2,884	1,088 s	377 ms
Pardot	2,500	1,080 s	432 ms
Bugsnag	2,323	1,072 s	461 ms
Mixpanel	13,179	1,053 s	80 ms
Chartbeat	13,104	1,048 s	80 ms
LivePerson	9,838	1,016 s	103 ms
Secomapp	2,606	1,010 s	387 ms
Revolver Maps	1,558	1,003 s	644 ms
SmartAdServer	5,903	998 s	169 ms
Meetrics	1,623	944 s	582 ms
Fort Awesome	1,774	942 s	531 ms
Ve	6,509	941 s	145 ms
Marchex	8,566	936 s	109 ms
Neodata	2,708	932 s	344 ms
Sekindo	413	926 s	2242 ms
RevJet	5,763	924 s	160 ms
Ecwid	1,811	899 s	496 ms
One by AOL	3,525	898 s	255 ms
Digital ad Consortium	5,737	871 s	152 ms
Seznam	3,966	870 s	219 ms
Popads	7,435	870 s	117 ms
BlueKai	11,372	857 s	75 ms
Pixlee	1,588	850 s	535 ms
Booking.com	5,723	842 s	147 ms
Shareaholic	9,532	839 s	88 ms
Digioh	2,150	839 s	390 ms
ForeSee	4,507	833 s	185 ms
MaxCDN Enterprise	5,000	831 s	166 ms
Outbrain	9,003	805 s	89 ms
OpenTable	5,458	792 s	145 ms
Treasure Data	11,283	791 s	70 ms
Cedato	551	776 s	1409 ms
Net Reviews	5,520	748 s	136 ms
TrafficStars	3,973	741 s	186 ms
Clicktale	3,814	738 s	193 ms
Audience 360	800	725 s	906 ms
Nosto	5,112	724 s	142 ms
Between Digital	2,337	710 s	304 ms
TrackJS	1,660	703 s	423 ms
TINT	695	697 s	1003 ms
Parse.ly	6,259	696 s	111 ms
ResponsiveVoice	2,296	694 s	302 ms
Snowplow	6,077	693 s	114 ms
Affirm	2,742	688 s	251 ms
GitHub	2,469	685 s	278 ms
Ooyala	1,360	683 s	502 ms
LeasdBoxer	229	663 s	2894 ms
Hola Networks	428	654 s	1528 ms
WordPress Site Stats	10,174	653 s	64 ms
PushCrew	7,655	649 s	85 ms
Vidyard	1,532	646 s	422 ms
UserReport	2,659	646 s	243 ms
Yandex CDN	3,636	639 s	176 ms
Adroll	5,475	616 s	112 ms
Wishpond Technologies	1,363	608 s	446 ms
JuicyAds	4,980	605 s	121 ms
MailMunch	9,263	599 s	65 ms
Market GID	2,072	596 s	288 ms
Maxymiser	2,539	593 s	234 ms
Smart AdServer	4,855	586 s	121 ms
Unbounce	5,583	581 s	104 ms
AOL / Oath / Verizon Media	3,688	578 s	157 ms
Sortable	2,729	573 s	210 ms
Media Math	3,427	555 s	162 ms
Zmags	395	551 s	1396 ms
Verizon Digital Media CDN	722	548 s	759 ms
Auto Link Maker	2,421	539 s	223 ms
Media Management Technologies	1,349	532 s	395 ms
ThreatMetrix	558	526 s	943 ms
FreakOut	7,279	524 s	72 ms
iAdvize SAS	3,652	523 s	143 ms
Quantcast	6,563	514 s	78 ms
Clicktripz	6,194	512 s	83 ms
Signyfyd	504	508 s	1007 ms
Sharethrough	4,307	506 s	118 ms
Polar	1,353	502 s	371 ms
Sift Science	3,432	501 s	146 ms
Swiftype	2,941	497 s	169 ms
piano	1,739	497 s	286 ms
Quantum Metric	684	495 s	723 ms
Branch Metrics	2,076	470 s	226 ms
PerimeterX Bot Defender	582	467 s	803 ms
Decibel Insight	1,116	462 s	414 ms
Experian Cross-Channel Marketing Platform	276	462 s	1673 ms
Pagely	1,828	459 s	251 ms
Adverline Board	2,345	452 s	193 ms
Adocean	2,378	447 s	188 ms
Po.st	2,418	446 s	185 ms
Technorati	1,091	445 s	408 ms
Mobify	442	442 s	999 ms
Reviews.co.uk	1,197	440 s	367 ms
Gleam	878	439 s	500 ms
AppDynamics	3,118	429 s	137 ms
Perfect Market	1,829	425 s	232 ms
TripAdvisor	805	420 s	522 ms
BounceX	2,744	411 s	150 ms
iPerceptions	4,165	410 s	98 ms
Opentag	1,987	408 s	205 ms
Stackla PTY	1,307	407 s	311 ms
Clerk.io ApS	1,678	407 s	242 ms
infogr.am	295	402 s	1362 ms
Amplitude Mobile Analytics	5,400	398 s	74 ms
Touch Commerce	418	394 s	943 ms
Rackspace	1,381	392 s	284 ms
etracker	3,877	389 s	100 ms
Crowd Control	4,505	382 s	85 ms
Expedia	889	382 s	430 ms
SearchSpring	858	380 s	443 ms
ShopiMind	614	380 s	619 ms
Vox Media	1,431	380 s	265 ms
Marketo	2,516	377 s	150 ms
Comm100	3,177	377 s	119 ms
LightWidget	5,623	367 s	65 ms
Searchanise	4,750	356 s	75 ms
Fraudlogix	1,641	354 s	216 ms
GetIntent RTBSuite	593	352 s	594 ms
OptiMonk	2,755	348 s	126 ms
SpotXchange	789	344 s	436 ms
MonetizeMore	279	338 s	1212 ms
Snacktools	1,598	337 s	211 ms
LoopMe	906	337 s	372 ms
TagCommander	2,803	334 s	119 ms
StreamRail	399	334 s	836 ms
Roxr Software	4,804	333 s	69 ms
Qubit Deliver	768	332 s	432 ms
Heap	4,211	328 s	78 ms
IPONWEB	1,728	328 s	190 ms
Connatix	402	321 s	799 ms
Forensiq	2,038	313 s	154 ms
GetSiteControl	3,473	299 s	86 ms
eBay	1,585	296 s	187 ms
Monetate	1,932	295 s	153 ms
Celtra	1,384	292 s	211 ms
Siteimprove	3,278	290 s	89 ms
Tencent	2,445	286 s	117 ms
Bizible	2,050	284 s	139 ms
fluct	4,240	271 s	64 ms
Global-e	876	269 s	307 ms
Refersion	2,484	268 s	108 ms
Convert Insights	1,968	267 s	136 ms
Listrak	2,153	267 s	124 ms
FirstImpression	587	259 s	441 ms
AvantLink	315	255 s	809 ms
Mather Economics	1,496	253 s	169 ms
Constant Contact	3,036	252 s	83 ms
RD Station	3,542	250 s	71 ms
Fanplayr	373	250 s	671 ms
ContentSquare	2,288	250 s	109 ms
WisePops	1,062	248 s	234 ms
Gfycat	314	245 s	779 ms
Skype	1,705	243 s	143 ms
Calendly	722	240 s	332 ms
ExoClick	4,263	239 s	56 ms
Moovweb	160	238 s	1487 ms
Curalate	796	233 s	292 ms
[24]7	395	229 s	579 ms
Rakuten Marketing	2,977	228 s	77 ms
iovation	2,215	228 s	103 ms
Adtech (AOL)	781	226 s	290 ms
Evergage	974	226 s	232 ms
Smarter Click	1,093	226 s	207 ms
Apester	641	223 s	348 ms
Kampyle	1,360	222 s	163 ms
Flowplayer	839	220 s	262 ms
GIPHY	452	218 s	483 ms
Shopgate	1,228	218 s	178 ms
Knight Lab	280	217 s	776 ms
PowerReviews	1,342	216 s	161 ms
Foursixty	2,510	215 s	86 ms
Bronto Software	1,864	213 s	115 ms
Accuweather	3,088	212 s	69 ms
Bootstrap Chinese network	822	209 s	255 ms
mParticle	450	207 s	461 ms
Conversant	583	206 s	353 ms
Adyoulike	2,750	204 s	74 ms
ZEDO	710	203 s	285 ms
AddEvent	1,395	200 s	143 ms
CPEx	1,759	199 s	113 ms
DMD Marketing	1,311	198 s	151 ms
Flickr	580	196 s	338 ms
Cloudinary	1,043	196 s	188 ms
Marketplace Web Service	675	192 s	284 ms
Auth0	489	184 s	377 ms
Interpublic Group	937	184 s	197 ms
Symantec	2,348	182 s	78 ms
Yottaa	505	182 s	361 ms
Reviews.io	361	180 s	499 ms
plista	1,488	173 s	116 ms
TRUSTe	1,917	172 s	90 ms
WebEngage	1,277	172 s	134 ms
Tail Target	2,217	169 s	76 ms
Bootstrap CDN	2,849	168 s	59 ms
DialogTech	1,751	165 s	94 ms
Janrain	246	164 s	665 ms
Lytics	1,255	161 s	128 ms
Intercept Interactive	952	160 s	168 ms
Better Business Bureau	193	159 s	823 ms
Adkontekst	815	158 s	194 ms
Key CDN	508	155 s	305 ms
Usabilla	1,611	155 s	96 ms
WalkMe	634	154 s	244 ms
TubeMogul	500	152 s	305 ms
Zanox	971	152 s	157 ms
AdSniper	453	152 s	335 ms
Underdog Media	545	151 s	278 ms
Survicate	1,142	151 s	133 ms
Optanon	1,931	151 s	78 ms
smartclip	866	151 s	174 ms
Chitika	711	150 s	211 ms
Livefyre	569	150 s	264 ms
Sidecar	602	150 s	249 ms
Trusted Shops	3,829	150 s	39 ms
eXelate	476	148 s	311 ms
AudienceSearch	1,355	147 s	108 ms
Time	446	147 s	329 ms
AddShoppers	1,100	147 s	133 ms
PERFORM	383	145 s	379 ms
Permutive	1,172	145 s	124 ms
Investis	113	144 s	1275 ms
ReTargeter	410	143 s	349 ms
OwnerIQ	1,476	143 s	97 ms
Highcharts	816	142 s	174 ms
Revcontent	1,233	141 s	115 ms
rewardStyle.com	1,165	141 s	121 ms
Github	1,115	139 s	125 ms
Smart Insight Tracking	1,467	135 s	92 ms
The Hut Group	802	134 s	167 ms
Reevoo	641	134 s	209 ms
SnapEngage	2,138	133 s	62 ms
Picreel	1,042	133 s	128 ms
FoxyCart	652	133 s	204 ms
Glassdoor	100	132 s	1325 ms
Freshdesk	862	130 s	151 ms
Adobe Test & Target	366	130 s	355 ms
Alexa	2,350	130 s	55 ms
GetResponse	1,535	129 s	84 ms
Kameleoon	303	128 s	424 ms
White Ops	490	128 s	262 ms
Concert	729	127 s	174 ms
Radar	1,357	126 s	93 ms
Affiliate Window	1,849	125 s	68 ms
ShopRunner	289	123 s	427 ms
BoldChat	982	123 s	125 ms
Best Of Media S.A.	405	121 s	299 ms
Simpli.fi	747	119 s	160 ms
Rocket Fuel	1,322	118 s	89 ms
C3 Metrics	609	118 s	193 ms
PlayAd Media Group	355	116 s	326 ms
WebSpectator	677	115 s	170 ms
unpkg	588	115 s	195 ms
Autopilot	1,314	114 s	87 ms
RebelMouse	112	112 s	999 ms
Sajari Pty	472	111 s	234 ms
Elastic Ad	1,762	110 s	63 ms
F@N Communications	1,216	110 s	90 ms
Arbor	637	108 s	170 ms
Madison Logic	1,260	108 s	86 ms
Covert Pics	1,021	108 s	106 ms
Unruly Media	825	107 s	129 ms
Weborama	725	105 s	145 ms
Nativo	1,140	105 s	92 ms
LinkedIn Ads	1,220	105 s	86 ms
Onet	220	104 s	474 ms
AdsWizz	301	104 s	345 ms
Adobe Scene7	1,234	103 s	83 ms
Geniee	1,256	102 s	81 ms
Sparkflow	854	101 s	118 ms
Kaizen Platform	502	99 s	197 ms
TripleLift	354	99 s	279 ms
iZooto	1,400	98 s	70 ms
The Trade Desk	1,142	98 s	86 ms
Playbuzz	450	98 s	217 ms
Heroku	396	97 s	244 ms
Forter	166	94 s	568 ms
Tradelab	1,240	93 s	75 ms
Ambassador	414	93 s	225 ms
Adthink	262	93 s	355 ms
ClickDesk	1,234	92 s	75 ms
InSkin Media	195	92 s	472 ms
Edge Web Fonts	620	91 s	147 ms
Adition	781	91 s	116 ms
Reflektion	316	87 s	275 ms
Effective Measure	1,024	87 s	85 ms
CleverDATA	1,197	86 s	71 ms
Typepad	544	85 s	157 ms
Adscale	832	83 s	100 ms
Profitshare	596	83 s	140 ms
Republer	908	82 s	90 ms
Socialphotos	444	81 s	183 ms
Keywee	490	80 s	164 ms
SkyScanner	272	79 s	291 ms
ReadSpeaker	749	79 s	105 ms
Mediahawk	276	78 s	284 ms
TruConversion	496	77 s	156 ms
Kargo	145	77 s	533 ms
Transifex	297	77 s	258 ms
Triblio	185	77 s	414 ms
SpringServer	200	76 s	379 ms
Appier	842	75 s	89 ms
Qualaroo	928	75 s	80 ms
Riskified	1,038	74 s	71 ms
NetFlix	834	74 s	89 ms
ReCollect	150	73 s	489 ms
MLveda	171	73 s	424 ms
SaleCycle	990	72 s	72 ms
SurveyMonkey	484	71 s	146 ms
Dynamic Converter	188	69 s	366 ms
FuelX	352	69 s	195 ms
News	330	68 s	207 ms
Nend	1,713	68 s	40 ms
BlueCava	208	68 s	325 ms
Talkable	677	67 s	100 ms
Omniconvert	738	67 s	90 ms
Sooqr Search	880	65 s	74 ms
Tagboard	273	65 s	237 ms
Fresh Relevance	768	64 s	84 ms
Moxie	203	64 s	315 ms
LiveHelpNow	697	63 s	91 ms
InAuth	170	63 s	370 ms
Vee24	202	63 s	311 ms
Petametrics	428	63 s	146 ms
Pusher	289	62 s	216 ms
Kiosked	126	62 s	493 ms
Viacom	360	62 s	172 ms
JustPremium Ads	686	62 s	90 ms
Conversant Tag Manager	312	61 s	197 ms
Pixalate	354	60 s	170 ms
Opinion Stage	483	58 s	121 ms
User Replay	162	57 s	351 ms
Dropbox	112	57 s	506 ms
Postcode Anywhere (Holdings)	319	56 s	177 ms
Browsealoud	947	56 s	59 ms
Steelhouse	629	56 s	89 ms
reEmbed	306	55 s	180 ms
Resonance Insights	244	55 s	225 ms
Aggregate Knowledge	200	55 s	274 ms
DemandBase	660	54 s	82 ms
FLXone	324	54 s	166 ms
VoiceFive	589	53 s	91 ms
KISSmetrics	766	53 s	69 ms
Feedbackify	617	52 s	85 ms
Pingdom RUM	236	51 s	216 ms
Innovid	132	51 s	385 ms
SublimeSkinz	834	50 s	60 ms
CNET Content Solutions	142	50 s	349 ms
Zolando	112	49 s	436 ms
Ipify	472	49 s	103 ms
Connexity	114	48 s	418 ms
Attentive	555	48 s	86 ms
Advance Magazine Group	382	47 s	123 ms
Widespace	359	46 s	128 ms
Customer.io	382	46 s	119 ms
Performio	335	45 s	136 ms
Council ad Network	356	45 s	126 ms
linkpulse	618	45 s	73 ms
Google Plus	497	44 s	89 ms
Zarget	418	43 s	103 ms
Accordant Media	489	42 s	86 ms
Sirv	430	42 s	97 ms
Alliance for Audited Media	166	41 s	249 ms
Snack Media	249	41 s	164 ms
TechTarget	170	41 s	239 ms
Ad6Media	162	40 s	247 ms
United Internet	118	40 s	336 ms
Proper Media	218	39 s	181 ms
Wow Analytics	242	39 s	162 ms
MaxMind	288	39 s	136 ms
fifty-five	254	39 s	152 ms
Silverpop	526	38 s	73 ms
Sweet Tooth	422	38 s	90 ms
Reklama	109	38 s	350 ms
Vergic AB	166	38 s	229 ms
Highwinds	105	38 s	361 ms
SlimCut Media Outstream	256	38 s	148 ms
Salesforce.com	534	37 s	69 ms
Delta Projects AB	555	37 s	67 ms
VidPulse	172	37 s	214 ms
AWeber	318	35 s	111 ms
epoq internet services	342	35 s	103 ms
Borderfree	130	34 s	261 ms
bRealTime	233	33 s	144 ms
NetAffiliation	354	33 s	93 ms
Hull.js	208	33 s	158 ms
Bookatable	304	33 s	108 ms
Storygize	216	32 s	150 ms
PebblePost	128	32 s	253 ms
Hupso Website Analyzer	487	32 s	66 ms
AdsNative	304	32 s	105 ms
ResponseTap	441	32 s	72 ms
AdvertServe	247	31 s	126 ms
AdTrue	400	31 s	77 ms
The Publisher Desk	125	30 s	243 ms
Vergic Engage Platform	134	30 s	226 ms
The ADEX	470	30 s	64 ms
TrafficJunky	28	29 s	1047 ms
Fonecall	149	29 s	195 ms
Byside	192	29 s	151 ms
AdRiver	194	29 s	149 ms
LoginRadius	160	29 s	180 ms
Impact Radius	300	28 s	94 ms
Conversio	362	28 s	78 ms
Infinity Tracking	311	28 s	90 ms
Ceros	111	28 s	250 ms
Civic	436	28 s	63 ms
Datawrapper	154	28 s	179 ms
Drip	578	27 s	47 ms
Meltwater Group	150	27 s	182 ms
Iterate	114	27 s	238 ms
Rakuten LinkShare	212	27 s	127 ms
Klevu Search	416	26 s	64 ms
Prezi	196	26 s	134 ms
Exactag	254	26 s	102 ms
Raygun	211	26 s	122 ms
Betgenius	270	26 s	95 ms
AdSpruce	104	25 s	245 ms
Cookie-Script.com	279	25 s	90 ms
cloudIQ	241	25 s	104 ms
HP Optimost	70	25 s	356 ms
PowerFront	120	24 s	203 ms
Acceptable Ads	222	24 s	109 ms
CyberSource (Visa)	359	24 s	67 ms
Woopra	339	24 s	71 ms
Sourcepoint	120	24 s	196 ms
Navegg	372	23 s	61 ms
Mopinion	190	23 s	120 ms
Adobe Marketing Cloud	276	22 s	81 ms
Flockler	160	22 s	139 ms
Vibrant Media	275	22 s	80 ms
Vertical Mass	134	22 s	163 ms
GoSquared	277	22 s	78 ms
VisScore	318	21 s	68 ms
AnswerDash	223	21 s	96 ms
DemandJump	128	21 s	165 ms
Admitad	288	21 s	72 ms
Datonics	284	21 s	73 ms
RichRelevance	116	20 s	177 ms
CANDDi	186	20 s	108 ms
Polyfill service	120	20 s	167 ms
Ekm Systems	238	19 s	82 ms
Cookie Reports	200	19 s	94 ms
Friendbuy	222	19 s	83 ms
SecuredVisit	264	18 s	69 ms
Twitter Online Conversion Tracking	219	18 s	83 ms
HotelsCombined	136	18 s	132 ms
Extole	146	18 s	122 ms
Oracle Recommendations On Demand	212	18 s	84 ms
Freespee	205	18 s	86 ms
Reactful	168	18 s	104 ms
Elecard StreamEye	128	17 s	134 ms
Braintree Payments	161	17 s	106 ms
Scoota	94	16 s	175 ms
CleverTap	186	16 s	88 ms
Cross Pixel Media	114	16 s	142 ms
Optimove	162	16 s	99 ms
Netlify	220	16 s	71 ms
Barilliance	148	15 s	103 ms
Exponential Interactive	329	15 s	46 ms
Remintrex	186	15 s	81 ms
Web Dissector	113	15 s	133 ms
Cachefly	130	15 s	115 ms
Spot.IM	100	15 s	148 ms
OnScroll	126	14 s	114 ms
UPS i-parcel	110	14 s	131 ms
Attribution	186	14 s	76 ms
Exponea	199	14 s	70 ms
AdSupply	118	13 s	113 ms
Video Media Groep	131	13 s	101 ms
AIR.TV	197	13 s	67 ms
content.ad	129	13 s	101 ms
Bet365	140	13 s	92 ms
Site24x7 Real User Monitoring	174	12 s	71 ms
RightNow Service Cloud	122	12 s	100 ms
Ziff Davis Tech	180	12 s	68 ms
TurnTo	115	12 s	103 ms
Adunity	103	12 s	114 ms
Swoop	166	12 s	70 ms
Browser-Update.org	186	11 s	61 ms
Boomtrain	148	11 s	74 ms
Ghostery Enterprise	129	11 s	85 ms
Microad	136	11 s	79 ms
ShopStorm	132	11 s	81 ms
Sailthru	184	10 s	57 ms
NaviStone	116	10 s	89 ms
Tag Inspector	115	10 s	89 ms
StumbleUpon	106	10 s	94 ms
Channel.me	83	10 s	118 ms
Wufoo	148	10 s	66 ms
Hawk Search	141	9 s	64 ms
Bluecore	112	9 s	80 ms
UpSellit	105	9 s	86 ms
emetriq	157	8 s	54 ms
MailPlus	116	8 s	72 ms
Bidswitch	118	8 s	65 ms
Realytics	108	8 s	70 ms
Catchpoint	144	7 s	49 ms
Sonobi	39	7 s	172 ms
DialogTech SourceTrak	116	7 s	57 ms
Intilery	102	6 s	63 ms
Polldaddy	75	6 s	85 ms
Flipboard	112	6 s	55 ms
Improve Digital	46	6 s	126 ms
Qualtrics	46	6 s	123 ms
JustUno	328	6 s	17 ms
Webtrends	29	6 s	190 ms
MathJax	46	4 s	98 ms
Xaxis	44	4 s	80 ms
ConvertMedia	45	3 s	76 ms
ARM	29	3 s	117 ms
Research Online	43	3 s	75 ms
DistroScale	43	3 s	74 ms
StackExchange	42	3 s	76 ms
StackAdapt	35	3 s	90 ms
eGain	41	3 s	75 ms
Soundest	44	3 s	66 ms
YoYo	24	3 s	116 ms
BuySellAds	42	3 s	66 ms
Sociomantic Labs	46	3 s	58 ms
AdCurve	38	3 s	67 ms
Nanorep	33	3 s	78 ms
Webtrekk	24	2 s	100 ms
AliveChat	38	2 s	57 ms
Click4Assistance	27	2 s	77 ms
Fastest Forward	33	2 s	57 ms
Pagefair	35	2 s	53 ms
Fastly Insights	23	1 s	64 ms
PrintFriendly	28	1 s	49 ms
PhotoBucket	15	1 s	89 ms
Eyeota	15	1 s	75 ms
Pictela (AOL)	3	1 s	367 ms
ContextWeb	14	1 s	74 ms
Vindico	4	1 s	190 ms
Captify Media	8	0 s	60 ms
Intent IQ	4	0 s	68 ms
Freshchat	2	0 s	57 ms
PubNation	2	0 s	55 ms

Future Work

1. Introduce URL-level data for more fine-grained analysis, i.e. which libraries from Cloudflare/Google CDNs are most expensive.
2. Expand the scope, i.e. include more third parties and have greater entity/category coverage.

FAQs

I don't see entity X in the list. What's up with that?

This can be for one of several reasons:

1. The entity does not have references to their origin on at least 50 pages in the dataset.
2. The entity's origins have not yet been identified. See How can I contribute?

What is "Total Occurences"?

Total Occurrences is the number of pages on which the entity is included.

How is the "Average Impact" determined?

The HTTP Archive dataset includes Lighthouse reports for each URL on mobile. Lighthouse has an audit called "bootup-time" that summarizes the amount of time that each script spent on the main thread. The "Average Impact" for an entity is the total execution time of scripts whose domain matches one of the entity's domains divided by the total number of pages that included the entity.

Average Impact = Total Execution Time / Total Occurrences

How does Lighthouse determine the execution time of each script?

Lighthouse's bootup time audit attempts to attribute all toplevel main-thread tasks to a URL. A main thread task is attributed to the first script URL found in the stack. If you're interested in helping us improve this logic, see Contributing for details.

The data for entity X seems wrong. How can it be corrected?

Verify that the origins in data/entities.json5 are correct. Most issues will simply be the result of mislabelling of shared origins. If everything checks out, there is likely no further action and the data is valid. If you still believe there's errors, file an issue to discuss futher.

How can I contribute?

Only about 90% of the third party script execution has been assigned to an entity. We could use your help identifying the rest! See Contributing for details.

Contributing

Thanks

A huge thanks to @simonhearne and @soulgalore for their assistance in classifying additional domains!

Updating the Entities

The domain->entity mapping can be found in data/entities.json5. Adding a new entity is as simple as adding a new array item with the following form.

{
    "name": "Facebook",
    "homepage": "https://www.facebook.com",
    "categories": ["social"],
    "domains": [
        "*.facebook.com",
        "*.fbcdn.net"
    ],
    "examples": [
        "www.facebook.com",
        "connect.facebook.net",
        "staticxx.facebook.com",
        "static.xx.fbcdn.net",
        "m.facebook.com"
    ]
}

Updating Attribution Logic

The logic for attribution to individual script URLs can be found in the Lighthouse repo. File an issue over there to discuss further.

Updating the Data

The queries used to compute the data are in the sql/ directory.

1. Edit bootup-time-scripting.partial.sql to query the correct month's HTTPArchive run.
2. Run origin-query.generated.sql in BigQuery.
3. Download the results and check them in at data/YYYY-MM-DD-origin-scripting.json.
4. Run yarn build to regenerate the latest canonical domain mapping.
5. Create a new table in lighthouse-infrastructure.third_party_web BigQuery table of the format YYYY_MM_DD with the csv in dist/domain-map.csv with three columns domain, canonicalDomain, and category.
6. Edit bootup-time-scripting.partial.sql to join on the table you just created.
7. Run yarn build to regenerate the queries.
8. Run entity-per-page.generated.sql in BigQuery.
9. Download the results and check them in at data/YYYY-MM-DD-entity-scripting.json.

Updating this README

This README is auto-generated from the templates lib/ and the computed data. In order to update the charts, you'll need to make sure you have cairo installed locally in addition to yarn install.

# Install `cairo` and dependencies for node-canvas
brew install pkg-config cairo pango libpng jpeg giflib
# Build the requirements in this repo
yarn build
# Regenerate the README
yarn start

Updating the website

The web code is located in www/ directory of this repository. Open a PR to make changes.