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perf-marks

The simplest and lightweight solution for User Timing API in Javascript.

  • 1.3.0
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  • npm
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Perf-marks

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npm version npm downloads MIT License

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Perf marks

The simplest and lightweight solution for User Timing API in Javascript. Simple how it should be.

Contributing

Please check our contributing.md to know more about setup and how to contribute.

Setup and installation

Make sure that you are using the NodeJS version is the same as .nvmrc file version. If you don't have this version please use a version manager such as nvm or n to manage your local nodejs versions.

Please make sure that you are using NodeJS version 6.10.2

Assuming that you are using nvm, please run the commands inside this folder:

$ nvm install $(cat .nvmrc); # install required nodejs version
$ nvm use $(cat .nvmrc); # use nodejs version

In Windows, please install NodeJS using one of these options:

Via NVM Windows package: Dowload via this link. After that, run the commands:

$ nvm install $(cat .nvmrc); # install required nodejs version
$ nvm use $(cat .nvmrc); # use nodejs version

Via Chocolatey:

$ choco install nodejs.install -version 6.10.2

Install yarn

We use yarn as our package manager instead of npm

Install it following these steps

After that, just navigate to your local repository and run

$ yarn install

Demo

Try out our demo on Stackblitz!

Perf marks in action

Run the app

$ yarn start

Run the tests

$ yarn test # run the tests

Run the build

$ yarn build # run the tests

PerfMarks

This service exposes a few different methods with which you can interact with feature toggle service.

PerfMarks.start(markName)

Adds the user timing api marker instrumentation in your application.

import * as PerfMarks from 'perf-marks';

...
PerfMarks.start('name-of-your-mark');
...

PerfMarks.end(markName)

Returns the results for the specified marker

import * as PerfMarks from 'perf-marks';

...
PerfMarks.start('name-of-your-mark');
...
const markResults: PerfMarks.PerfMarksPerformanceEntry = PerfMarks.end('name-of-your-mark');

PerfMarks.clear(markName)

Removes the specified marker

import * as PerfMarks from 'perf-marks';

...
PerfMarks.start('name-of-your-mark');
...
PerfMarks.clear('name-of-your-mark');
...

PerfMarks.clearAll()

Removes all the marker

import * as PerfMarks from 'perf-marks';

...
PerfMarks.start('name-of-your-mark');
...
PerfMarks.clearAll();
...

PerfMarks.getNavigationMarker()

Gets the marks for navigation loaded

import * as PerfMarks from 'perf-marks';

...
const markResults: PerfMarksPerformanceNavigationTiming = PerfMarks.getNavigationMarker();
...

PerfMarks.getEntriesByType(markName)

Gets the result for all marks that matches with the given mark name

import * as PerfMarks from 'perf-marks';

...
PerfMarks.start('name-of-your-mark');
PerfMarks.start('another-name-of-your-mark');
...
// It will return results for all the marks that matches with `name-of-your-mark`
// In this case, `name-of-your-mark` and `another-name-of-your-mark`
const markResult: PerfMarksPerformanceNavigationTiming[] = PerfMarks.getEntriesByType('name-of-your-mark');
...

PerfMarks.isUserTimingAPISupported

Boolean with the result of the check if User Timing API is supported for the current browser/NodeJS version

import * as PerfMarks from 'perf-marks';

...
PerfMarks.start('name-of-your-mark');
PerfMarks.start('another-name-of-your-mark');
...
// It will return results for all the marks that matches with `name-of-your-mark`
// In this case, `name-of-your-mark` and `another-name-of-your-mark`
const markResult: PerfMarksPerformanceNavigationTiming[] = PerfMarks.getEntriesByType('name-of-your-mark');
...

Entrypoints

These are entrypoints for specific components to be used carefully by the consumers. If you're using one of these entrypoints we are assuming you know what you are doing. So it means that code-splitting and tree-shaking should be done on the consumer/product side.

Exposed entrypoints

  • perf-marks/marks: it has all the methods for marks
    • start
    • end
    • clear
    • clearAll
  • perf-marks/entries: it has all the methods to get entries
    • getNavigationMarker
    • getEntriesByType

Publish

this project is using np package to publish, which makes things straightforward. EX: np <patch|minor|major>

For more details, please check np package on npmjs.com

Author

Wilson Mendes (willmendesneto)

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Package last updated on 22 Oct 2019

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