𝗪𝗵𝗮𝘁 𝗔𝗿𝗲 𝗧𝘆𝗽𝗲𝗱 𝗔𝗿𝗿𝗮𝘆𝘀 𝗜𝗻 𝗝𝗮𝘃𝗮𝗦𝗰𝗿𝗶𝗽𝘁?

𝗪𝗵𝗮𝘁 𝗔𝗿𝗲 𝗧𝘆𝗽𝗲𝗱 𝗔𝗿𝗿𝗮𝘆𝘀 𝗜𝗻 𝗝𝗮𝘃𝗮𝗦𝗰𝗿𝗶𝗽𝘁?

Regular JavaScript arrays hold any data type. This makes them slow for large data sets.

Typed arrays store only numbers of a fixed size. You pick the size and type when you create them.

Why use them?

• Speed: Computers process fixed data faster. This helps games and graphics.
• Memory: They store raw binary data. This uses less space.
• Access: Use these for images, audio, and files.

Common types:

• Uint8Array: Whole numbers 0 to 255. Used for images.
• Int8Array: Numbers -128 to 127.
• Uint16Array: Whole numbers 0 to 65,535. Used for audio.
• Float32Array: Decimal numbers. Used for physics.

Example:

Regular array: [1, "hello", true] Typed array: new Uint8Array([255, 128, 0])

Typed arrays have a fixed size. The size does not change. They store only one number type.

Node.js Buffer uses Uint8Array.

Tip: Typed arrays are views. They look into a memory chunk called an ArrayBuffer.

Source: https://dev.to/ho3na3/what-are-typed-arrays-in-javascript-342p