chinwagsocial/app/javascript/mastodon/performance.js

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//
// Tools for performance debugging, only enabled in development mode.
// Open up Chrome Dev Tools, then Timeline, then User Timing to see output.
// Also see config/webpack/loaders/mark.js for the webpack loader marks.
//
let marky;
if (process.env.NODE_ENV === 'development') {
marky = require('marky');
require('react-addons-perf').start();
}
export function start(name) {
if (process.env.NODE_ENV === 'development') {
marky.mark(name);
}
}
export function stop(name) {
if (process.env.NODE_ENV === 'development') {
marky.stop(name);
}
}