JavaScript计算字符串实际字节长度：match与replace方法性能对比

export function getByteLenMatch(data) {
  let result = 0;
  for (let s of data) {
    result += s.match(/[^\\x00-\\xff]/ig) == null ? 1 : 2;
  }
  return result;
}

export function getByteLenReplace(data) {
  return data.replace(/[^\\x00-\\xff]/ig, "aa").length;
}

let testData = new Array(50000000).fill("哈").toString();
    for (let i = 0; i < 3; i++) {
      console.time("getByteLenMatch");
      getByteLenMatch(testData);
      console.timeEnd("getByteLenMatch");
      console.time("getByteLenReplace");
      getByteLenReplace(testData);
      console.timeEnd("getByteLenReplace");
    }