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b8e643259e
Adds optional dictionary support to zlib’s zstdCompress and zstdDecompress APIs. This enables better compression ratios when the dictionary matches expected input structure or content patterns. The implementation allows passing a `dictionary` buffer through the options object. Support was added to both streaming and convenience methods. Tests and documentation were also updated to reflect this new capability. Fixes: https://github.com/nodejs/node/issues/59105 PR-URL: https://github.com/nodejs/node/pull/59240 Reviewed-By: Anna Henningsen <anna@addaleax.net>
26 lines
1.1 KiB
JavaScript
26 lines
1.1 KiB
JavaScript
'use strict';
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const common = require('../common');
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const assert = require('assert');
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const zlib = require('zlib');
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const dictionary = Buffer.from(
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`Lorem ipsum dolor sit amet, consectetur adipiscing elit.
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Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
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Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.`
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);
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const input = Buffer.from(
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`Lorem ipsum dolor sit amet, consectetur adipiscing elit.
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Lorem ipsum dolor sit amet, consectetur adipiscing elit.
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Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
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Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
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Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.`
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);
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zlib.zstdCompress(input, { dictionary }, common.mustSucceed((compressed) => {
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assert(compressed.length < input.length);
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zlib.zstdDecompress(compressed, { dictionary }, common.mustSucceed((decompressed) => {
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assert.strictEqual(decompressed.toString(), input.toString());
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}));
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}));
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