Inspect module load time using performance.mark and performance.measure.
This dev time loader is useful for calling out candidates for lazy loading.
npm i -D mark-loader
Add mark-loader to your webpack.config.js
//webpack.config.js
{
module.exports = {
//...
module: {
rules: [
{test: /\.js$/, use: 'mark-loader'}
]
}
}Open the Chrome Developer Tools to the Timeline tab and refresh the page. Load
information will show as a flame chart under User Timing.
There is overhead in performance.mark and performance.measure, so this
loader is not recommended in production builds.
ISC License (ISC) Copyright 2017 Jason Staten
Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.