Vinay M rmdort

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

	// Setup
	const { onIncreaseIndent, onDecreaseIndent } = useSpreadsheetState()

	return (
	<CanvasGrid
	onIncreaseIndent={onIncreaseIndent}
	onDecreaseIndent={onDecreaseIndent}
	/>
	)

	// Option 1 - With useSpreadsheetState hook
	// Calculator has to expose the following functions
	/*
	getPrecedents,
	getPrecedentsFromFormulaString,
	getDependents,
	getGraphNodes,
	*/

	export const Spreadsheet = () => {

	import { useCallback, useRef, useSyncExternalStore } from "react";

	export const useAsyncHook = <T>(fn: () => Promise<T> \| undefined) => {
	const resultRef = useRef<T>();
	const getSnapShot = () => resultRef.current;
	const subscribe = useCallback(
	(onStoreChange: () => void) => {
	const executeAsync = async () => {
	try {
	const result = await fn?.();

	import { useRef, useLayoutEffect } from "react";

	export const useMemoCompare = <T>(
	next: T,
	compare: (previous: T \| undefined, next: T) => boolean
	): T => {
	const previousRef = useRef<T>();
	const previous = previousRef.current;
	const isEqual = compare(previous, next);

	import { useRef, useLayoutEffect, useState, useCallback } from "react";

	type HTMLOrSVGElement = HTMLElement \| SVGElement;

	export type RectReadOnly = {
	readonly x: number;
	readonly y: number;
	readonly width: number;
	readonly height: number;
	readonly top: number;

	import React, {useState} from 'react';
	import {View, Text, TouchableOpacity, StyleSheet} from 'react-native';

	const App = () => {
	const [count, setCount] = useState(0);
	return (
	<View style={styles.container}>
	<Text style={styles.title}>Hello from {'\n'}React Native Web!</Text>
	<TouchableOpacity
	onPress={() => setCount(count + 1)}

	/**
	* Visit a graph node
	* Sort it topologically and return
	* all the dependents
	* @param nodes
	* @param previsit
	* @returns
	*/
	const topologicalSort = <T>(nodes: T[], children: (node: T) => Set<T>) => {
	const stack = new Set<T>();

Profiling in production