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Chrome DevTools: Understand how long pieces of JavaScript took to execute

23rd March 2016
Understand how long pieces of JavaScript took to execute

The Source Line Level Profiling feature in DevTools shows how long a line of JavaScript took to execute.

It's interesting to use this feature on code such as React, Ember.js, Polymer etc. If you combine this with CPU Throttling, you can get a decent representation as to how long a big chunk of JavaScript takes to execute on a low-end device, on page-load alone.

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