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davidgilbertson/gzipped-size.js

Last active October 8, 2018 00:53
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Get the size a file will be when gzipped
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gzipped-size.js
const fs = require('fs');
const zlib = require('zlib');
const file = fs.readFileSync('./some_file.js');
const rawSize = file.length;
const gzippedSize = zlib.gzipSync(file).length;
console.log('Raw size: ', (rawSize / 1000), 'KB');
console.log('Gzipped size: ', (gzippedSize / 1000), 'KB');
console.log('Compression: ', `${100 - Math.round(gzippedSize / rawSize * 1000) / 10}%`);
@davidgilbertson
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And a one liner to run in the Node cli zlib.gzipSync(fs.readFileSync('./someFile.js')).length

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