How does the JS engine optimize code at a high level?

How does the JS engine optimize code at a high level?

题目类型: 技术面试题

这是一道技术面试题，常见于澳洲IT公司面试中。

难度: hard

标签: interviewbit, javascript, topic-specific, frontend

参考答案摘要

JavaScript engines use JIT compilation to turn hot code into faster machine code. They create hidden classes to understand object shapes. Inline caching helps reuse property lookups. These optimizatio...

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