pinafore/routes/_utils/marks.js
2018-02-10 11:36:31 -08:00

26 lines
519 B
JavaScript

import noop from 'lodash/noop'
const enableMarks = process.browser &&
performance.mark &&
(process.env.NODE_ENV !== 'production' ||
new URLSearchParams(location.search).get('marks') === 'true')
const perf = process.browser && performance
function doMark(name) {
perf.mark(`start ${name}`)
}
function doStop(name) {
perf.mark(`end ${name}`)
perf.measure(name, `start ${name}`, `end ${name}`)
}
const mark = enableMarks ? doMark : noop
const stop = enableMarks ? doStop : noop
export {
mark,
stop
}