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#!/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)));
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