DeveloperBreeze

Javascript Programming Tutorials, Guides & Best Practices

Explore 93+ expertly crafted javascript tutorials, components, and code examples. Stay productive and build faster with proven implementation strategies and design patterns from DeveloperBreeze.

Mastering React Rendering Performance with Memoization and Context

Tutorial May 03, 2025

Example:

import React from 'react';

const Greeting = React.memo(function Greeting({ name }) {
  console.log("Greeting rendered");
  return <h3>Hello{name && ', '}{name}!</h3>;
});

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React Performance Optimization Cheatsheet: Hooks, Memoization, and Lazy Loading

Cheatsheet August 20, 2024
javascript

React.memo is a higher-order component that prevents a functional component from re-rendering unless its props change.

import React from 'react';

const ChildComponent = React.memo(({ name }) => {
  console.log('Rendering ChildComponent');
  return <div>Hello, {name}!</div>;
});

function ParentComponent() {
  const [count, setCount] = useState(0);

  return (
    <div>
      <ChildComponent name="John" />
      <button onClick={() => setCount(count + 1)}>Increment Count</button>
      <p>Count: {count}</p>
    </div>
  );
}

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