performance-js-tests
Install
$ npm install --save performance-js-tests
Usage
testable.js
// for example
window.somethingHappened = (callback) => {
setTimeout(callback, 1000);
};index.html
<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<script type="text/javascript">
const startTime = +new Date();
</script>
<script type="text/javascript" src="testable.js"></script>
<script type="text/javascript">
somethingHappened(() => {
const currentTime = +new Date();
window.onCustomEvent({ type: 'timeStamp', data: currentTime - startTime });
});
</script>
</body>
</html>performance test
const performanceTests = require('performance-js-tests');
(async() => {
await performanceTests({
puppeteer: {
htmlFile: 'index.html'
}
});
})()Browser will launch 100 times and you can see average file download or performance of js in ms
Options
{
// number of launched browsers
numberOfStarts: 100,
// maximum latency from the browser
waitingTime: 30000,
// koa
server: {
enable: true,
port: 3000,
baseDir: '.',
staticKoaOptions: {
// see link below
},
rewrite: {
// see link below
}
},
puppeteer: {
// will launch firefox-launch instead of chrome-launch
useFirefox: false,
// html file where js is launched
htmlFile: null,
launchOptions: {
// see link below
}
}
}