bun.sh/docs/guides/util/deflate.md

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Compress and decompress data with DEFLATE

Use Bun.deflateSync() to compress a Uint8Array with DEFLATE.

const data = Buffer.from("Hello, world!");
const compressed = Bun.deflateSync("Hello, world!");
// => Uint8Array

const decompressed = Bun.inflateSync(compressed);
// => Uint8Array

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See Docs > API > Utils for more useful utilities.