| #!/usr/bin/env node |
| |
| let defaults = |
| {input: 'input.br', output: 'output.txt', test_iters: 0, test_repeat: 100}; |
| |
| /* Parse command line arguments. */ |
| let argv = |
| require('yargs') |
| .usage('Usage: $0 -i file -o file') |
| .option( |
| 'input', |
| {alias: 'i', default: defaults.input, describe: 'compressed file'}) |
| .option('output', { |
| alias: 'o', |
| default: defaults.output, |
| describe: 'decompressed file' |
| }) |
| .option('test_iters', { |
| default: defaults.test_iters, |
| describe: '# of times to run performance test' |
| }) |
| .option('test_repeat', { |
| default: defaults.test_repeat, |
| describe: '# of times to decompress file in performance test' |
| }) |
| .argv; |
| |
| /* Read input. */ |
| const fs = require('fs'); |
| data = fs.readFileSync(argv.input); |
| if (!Buffer.isBuffer(data)) throw 'not a buffer'; |
| const bytes = new Uint8Array(data); |
| |
| /* Load and map brotli decoder module. */ |
| global.window = {}; |
| require('./decode.js') |
| const brotliDecode = window['BrotliDecode']; |
| |
| /* Load "performance" module. */ |
| const {PerformanceObserver, performance} = require('perf_hooks'); |
| |
| /* Performance test. */ |
| for (let i = 0; i < argv.test_iters; ++i) { |
| const a = performance.now(); |
| let result; |
| for (let j = 0; j < argv.test_repeat; ++j) { |
| result = brotliDecode(bytes); |
| } |
| const b = performance.now(); |
| const total_length = argv.test_repeat * result.length / (1024 * 1024); |
| const total_time = (b - a) / 1000; |
| |
| console.log( |
| total_length + 'MB / ' + total_time + |
| 's = ' + (total_length / total_time) + 'MB/s'); |
| } |
| |
| /* Decode and write output file. */ |
| fs.writeFileSync(argv.output, new Buffer(brotliDecode(bytes))); |