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@szmarczak/http-timer
Advanced tools
Readme
Timings for HTTP requests
Inspired by the request
package.
NPM:
npm install @szmarczak/http-timer
Yarn:
yarn add @szmarczak/http-timer
Note:
- The measured events resemble Node.js events, not the kernel ones.
- Sending a chunk greater than
highWaterMark
will result in invalidupload
andresponse
timings. You can avoid this by splitting the payload into smaller chunks.
import https from 'https';
import timer from '@szmarczak/http-timer';
const request = https.get('https://httpbin.org/anything');
timer(request);
request.once('response', response => {
response.resume();
response.once('end', () => {
console.log(response.timings); // You can use `request.timings` as well
});
});
// {
// start: 1572712180361,
// socket: 1572712180362,
// lookup: 1572712180415,
// connect: 1572712180571,
// upload: 1572712180884,
// response: 1572712181037,
// end: 1572712181039,
// error: undefined,
// abort: undefined,
// phases: {
// wait: 1,
// dns: 53,
// tcp: 156,
// request: 313,
// firstByte: 153,
// download: 2,
// total: 678
// }
// }
Returns: Object
Note: The time is a number
representing the milliseconds elapsed since the UNIX epoch.
start
- Time when the request started.socket
- Time when a socket was assigned to the request.lookup
- Time when the DNS lookup finished.connect
- Time when the socket successfully connected.secureConnect
- Time when the socket securely connected.upload
- Time when the request finished uploading.response
- Time when the request fired response
event.end
- Time when the response fired end
event.error
- Time when the request fired error
event.abort
- Time when the request fired abort
event.phases
wait
- timings.socket - timings.start
dns
- timings.lookup - timings.socket
tcp
- timings.connect - timings.lookup
tls
- timings.secureConnect - timings.connect
request
- timings.upload - (timings.secureConnect || timings.connect)
firstByte
- timings.response - timings.upload
download
- timings.end - timings.response
total
- (timings.end || timings.error || timings.abort) - timings.start
If something has not been measured yet, it will be undefined
.
MIT
FAQs
Timings for HTTP requests
The npm package @szmarczak/http-timer receives a total of 11,935,895 weekly downloads. As such, @szmarczak/http-timer popularity was classified as popular.
We found that @szmarczak/http-timer demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
Did you know?
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