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Change division to multiplication in floating-point midpoint#156647

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oscargus:fasterfloatmidpoint
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Change division to multiplication in floating-point midpoint#156647
oscargus wants to merge 1 commit into
rust-lang:mainfrom
oscargus:fasterfloatmidpoint

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Multiplication is faster than division on most (all?) platforms. While the optimizer will handle this, there is really no point in relying on that. Using multiplication directly will not have any drawbacks and are numerically identical (in this case since 1.0 / 2.0 == 0.5)

Consider the examples at https://godbolt.org/z/oMvb9vobG where it is clear that the non-optimized version uses division, while the optimized version uses multiplication.

@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-libs Relevant to the library team, which will review and decide on the PR/issue. labels May 16, 2026
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rustbot commented May 16, 2026

r? @Mark-Simulacrum

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