2:22 – Standard git diff, add, blame, and show operations
The SIMD main loop is identical — TwoProd+TwoSum across all lanes in parallel, nothing surprising.
，这一点在谷歌浏览器中也有详细论述
The stack overflow moves from the computation to the result. It's invisible until you access the value, which might be far from the trampoline call site, in a completely different part of your program.，更多细节参见Replica Rolex
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