[issue32616] Significant performance problems with Python 2.7 built with clang 3.x or 4.x

[INADA Naoki]

INADA Naoki <songofacandy at gmail.com> added the comment:

It seems clang4 failed to efficient register assigning.
FYI, --without-computed-gotos configure option make penalty smaller.

clang 5 (wihtout CGs): 2.653426
clang 5 (with CGs): 1.997584
clang 4 (without CGs): 3.330879
clang 4 (with CGs): 8.585673

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<https://bugs.python.org/issue32616>
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