Lukas Kurucz usrbowe

React recently introduced an experimental profiler API. This page gives instructions on how to use this API in a production release of your app.

Table of Contents

Profiling in production
- Create React App
- Webpack 4

Profiling in production

React DOM automatically supports profiling in development mode for v16.5+, but since profiling adds some small additional overhead it is opt-in for production mode. This gist explains how to opt-in.

This API was removed in React 17

Interaction tracing with React

React recently introduced an experimental profiler API. After discussing this API with several teams at Facebook, one common piece of feedback was that the performance information would be more useful if it could be associated with the events that caused the application to render (e.g. button click, XHR response). Tracing these events (or "interactions") would enable more powerful tooling to be built around the timing information, capable of answering questions like "What caused this really slow commit?" or "How long does it typically take for this interaction to update the DOM?".

With version 16.4.3, React added experimental support for this tracing by way of a new NPM package, scheduler. However the public API for this package is not yet finalized and will likely change with upcoming minor releases, so it should be used with caution.

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	}
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	function crc16(s) {

	/* Transform dasherized, underscored string to camelCase */
	const cameliseMe = (str, separator = "-") => {
	const splitted = str.split(separator);
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	return splitted.reduce(
	(acc, [up, ...rest]) => `${acc}${up.toUpperCase() + rest.join("")}`
	);
	};

-// Open console and run this script
-[...document.querySelectorAll('.branch-delete')].forEach(button => button.click());
-// URL to try
-// https://github.com/--url-to-repository/branches/stale

	# SK Release
	# https://gist.github.com/bclinkinbeard/1331790

	#!/bin/bash

	# file in which to update version number
	versionFile="package.json"

	# extract version number from versionFile
	# https://gist.github.com/DarrenN/8c6a5b969481725a4413

	declare var __DEV__: boolean;

	declare module 'react-native' {

	declare type Color = string \| number;

	declare type Transform =
	{ perspective: number } \|
	{ scale: number } \|
	{ scaleX: number } \|

	# Find process running with port 8081 and later kill it.
	# Tested on Mac OSx (should work on all unix based os as well)
	kill $(lsof -t -i :8081)