39 lines
1.1 KiB
JavaScript
39 lines
1.1 KiB
JavaScript
import { promises as fs } from 'fs';
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import zlib from 'zlib';
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import { promisify } from 'util';
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import { iterate } from 'glob';
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const formats = [{
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extension: '.gz',
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compress: promisify(zlib.gzip),
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options: {
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level: zlib.constants.Z_BEST_COMPRESSION
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}
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}, {
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extension: '.br',
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compress: promisify(zlib.brotliCompress),
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options: {
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params: {
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[zlib.constants.BROTLI_PARAM_QUALITY]: zlib.constants.BROTLI_MAX_QUALITY
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}
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}
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}];
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let totalSize = 0;
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const compressedSizes = {};
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console.log('compressing static files...')
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for await (const file of iterate('.next/static/{chunks,css}/**/*.{js,css}')) {
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const data = await fs.readFile(file);
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totalSize += data.length;
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for (const format of formats) {
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const compressed = await format.compress(data, format.options);
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compressedSizes[format.extension] = (compressedSizes[format.extension] ?? 0) + compressed.length;
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await fs.writeFile(`${file}${format.extension}`, compressed);
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}
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}
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Object.entries(compressedSizes).forEach(([ext, size]) =>
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console.log(` ${ext.slice(1)}: ${((1 - size / totalSize) * 100).toFixed(1)}% reduction (${Math.floor(totalSize / 1000)}kB -> ${Math.floor(size / 1000)}kB)`))
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