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by gmueckl
1496 days ago
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JavaScript VMs are inherently hampered by language design choices in JS. The dynamic typing and prototype based objects limit JIT based optimization for the full JS massively. Java and .NET have fully static typing which allows their JITs to be completely certain when they are translating code. JS JITs constantly have to add overhead in the form of escape hatches to deoptimized code if e.g. expectations about variable types are being broken at runtime. |
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