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Beating the compiler at signed 32-bit division

Daniel Lemire demonstrates custom-optimized techniques for signed 32-bit integer division that outperform what mainstream compilers generate. The post explores hand-tuned assembly and algorithmic tricks to achieve faster division by bypassing compiler-optimized library routines.

Background

Compiler-generated division instructions can be slower than hand-optimized alternatives, especially for signed 32-bit division which requires additional boundary case handling.

Source
Lobsters
Published
Nov 1, 2026 at 08:26 PM
Score
6.0 / 10