That's very likely. Clang 8.0 collapses the loop with any optimizer setting othe... | Hacker News

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supergarfield on March 26, 2017 | parent | context | favorite | on: How much your computer can do in a second

That's very likely. Clang 8.0 collapses the loop with any optimizer setting other than -O0.

But if you had to do it manually, loop unrolling and SIMD instructions (although not part of standard C) would be good bets and can probably get you an order of magnitude.

loeg on March 26, 2017 [–]

Clang 8.0?

dom0 on March 26, 2017 | [–]

Apple Clang version number is approximately the same as the Xcode version number, and not identical to the Clang release it's based on.

loeg on March 27, 2017 | | [–]

So what version of upstream Clang is Xcode 8.0 based on?

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