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v8 was initially 32-bit x86 only. And it wasn’t coded in a CPU independent way or word size independent way at all. Adding a new CPU amounted to basically rewri

by om2 8y ago

v8 was initially 32-bit x86 only. And it wasn’t coded in a CPU independent way or word size independent way at all. Adding a new CPU amounted to basically rewriting the whole JIT. Chrome took a long time to go 64-bit for this reason.