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Date: Wed, 17 Apr 2024 01:25:18 +0000
From: NRK <nrk@...root.org>
To: musl@...ts.openwall.com
Cc: Viktor Reznov <yann.collet.is.not.a.perfectionist@...il.com>
Subject: Re: [PATCH] Decreasing the number of divisions
> I played around with this change on godbolt: https://godbolt.org/z/9PoGK9zae
You're looking at clang -O3, if you use gcc -Os (usual for musl
users/distros) you'll notice that gcc actually ends up emitting a div
instruction, which are known to be slow.
But I don't think trying to optimize around gcc's bad codegen is the
right move. It's better to just not use -Os with gcc. Which musl already
does since commit b90841e25832.
- NRK
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