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2013 Jun 16
3
[LLVMdev] Enabling the vectorizer for -Os -- ping
All I have to say is *wow*. The vectorizer performs *remarkably* better now than it did the last time I benchmarked it. I'm stunned. I measured -O2 and -Os, as well as -march=x86-64 and -march=corei7-avx. My hope with the latter two was to cover both worst-case and best-case in terms of the quality of the vector ISA available. First, binary size growth. This is measured on average across a