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English(EN) String Concatenation vs Array Join: I Timed the Old Advice

Node.js 字符串拼接在循环中比数组连接更快

Node.js 22+ 的一项近期性能测试表明,在循环中使用数组连接优于字符串拼接的长期建议已不再准确。在循环中构建字符串时,发现直接使用 `+=` 进行拼接,在包括一百万次迭代在内的各种迭代次数下,其速度都快于或等于 `array.push().join()` 方法。这表明现代 JavaScript 引擎已优化了字符串拼接,避免了旧引擎的二次方性能损失。 AI

影响 这一发现可能导致开发者通过在循环中直接使用字符串拼接来简化代码,从而可能提高某些 JavaScript 应用程序的性能。

排序理由 该条目讨论的是编程语言的性能优化,而非新产品发布或前沿研究。

在 dev.to — Claude Code tag 阅读 →

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Node.js 字符串拼接在循环中比数组连接更快

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该条目讨论的是编程语言的性能优化,而非新产品发布或前沿研究。
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报道来源 [1]

  1. dev.to — Claude Code tag TIER_1 English(EN) · RAXXO Studios ·

    String Concatenation vs Array Join: I Timed the Old Advice

    <ul> <li><p>I timed string += against array push then join at four loop sizes in Node 22</p></li> <li><p>At 1 million iterations, += finished in 339ms against 437ms for push and join</p></li> <li><p>The two methods tied at 10,000 and 100,000 iterations, within a few percent eithe…