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Understanding Monomorphism Can Improve JavaScript Performance

🧵 The TL;DR

Monomorphism is a concept that can improve JavaScript performance up to 60x when taking advantage of inline-caching. Benchmarking may not show the full potential of this technique due to the limited variety of class shapes used.

    🔑 Key Points

  • CPUs only understand arrays and objects/classes need to be translated into arrays for them to be understood.
  • Inline-caching can improve performance up to 60x.
  • Benchmarking may not show the full potential of this technique due to the limited variety of class shapes used.

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