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Branchless Quicksort – faster than std:sort and pdqsort

Branchless Quicksort – faster than std:sort and pdqsort

by chrka·May 12, 2026·2 points·0 comments

AI Analysis

●●●BangerWizardryBig Brain

Beats std::sort and pdqsort by replacing branches with sorting networks.

Strengths
  • Sorting-network hybrid approach eliminates branch misprediction penalties.
  • Verified 2x speedup over baseline quicksort on Apple M1 hardware.
  • Full C source included with macro-based type flexibility.
Weaknesses
  • Niche applicability; most apps won't hit quicksort as a bottleneck.
  • No SIMD vectorization mentioned, leaving more optimization on table.
Target Audience

Systems programmers, performance engineers

Similar To

pdqsort · ips4o

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