v8-number-parsing-benchmark-generator.js

/**
 * @fileoverview
 * @author Taketoshi Aono
 */

const fs = require('fs');
const LOOP_COUNT = 1e6;

function generatorBenchmark(filename, cb) {
  const fd = fs.openSync(filename, 'w');
  fs.appendFileSync(fd, `const start = Date.now();eval("`);
  cb(fd);
  fs.appendFileSync(fd, '");console.log(`${Date.now() - start}ms.`);');
  fs.closeSync(fd);
}

generatorBenchmark('benchmark-separator.js', fd => {
  for (let i = 0; i < LOOP_COUNT; i++) {
    fs.appendFileSync(
      fd, [
        "1_0_0_0",
        "1_0e+1",
        "1_0e+1_0",
        "0xF_F_FF",
        "0o7_7_7",
        "0b0_1_0_1_0",
        ".3_2_1",
        "0.0_2_1",
        "1_0.0_1",
        ".0_1_2"
      ].join(';'));
  }
});

generatorBenchmark('benchmark-normal.js', fd => {
  for (let i = 0; i < LOOP_COUNT; i++) {
    fs.appendFileSync(
      fd, [
        "1000",
        "10e+1",
        "10e+10",
        "0xFFFF",
        "0o777",
        "0b01010",
        ".321",
        "0.021",
        "10.01",
        ".012"
      ].join(';'));
  }
});