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gh-144015: Add portable SIMD optimization for bytes.hex()#143991

Open

gpshead wants to merge 16 commits intopython:mainpython/cpython:mainfrom

gpshead:opt-pystrhexgpshead/cpython:opt-pystrhexCopy head branch name to clipboard

Conversation Commits16 (16)Checks Files changed

Open

gh-144015: Add portable SIMD optimization for bytes.hex()#143991
gpshead wants to merge 16 commits intopython:mainfrom
gpshead:opt-pystrhex

Commits

Commits on Jan 18, 2026

pystrhex: Add AVX2 SIMD optimization for hex conversion

gpshead
and
claude
committed
pystrhex: Add AVX-512 SIMD optimization for hex conversion

gpshead
and
claude
committed
pystrhex: Add ARM NEON SIMD optimization for hex conversion

gpshead
and
claude
committed
pystrhex: Add SSE2 SIMD optimization for hex conversion

gpshead
and
claude
committed
pystrhex: Remove AVX2/AVX-512, keep SSE2-only for simplicity

gpshead
and
claude
committed
pystrhex: Replace SSE2/NEON with portable SIMD using GCC vector extensions

gpshead
and
claude
committed
pystrhex: Add SIMD optimization for large separator groups

gpshead
and
claude
committed
measure more
gpshead
committed
pystrhex: Lower SIMD separator threshold to 8 bytes

gpshead
and
claude
committed
pystrhex: Use signed comparison for efficient SIMD codegen

gpshead
and
claude
committed
pystrhex: Factor out scalar hexlify into shared inline function

gpshead
and
claude
committed
remove benchmark data
gpshead
committed
pystrhex: Enable SIMD on 32-bit ARM with NEON

gpshead
and
claude
committed
explain more in the comments
gpshead
committed
remove the microbenchmark code
gpshead
committed
test_bytes: Add SIMD-specific test cases for bytes.hex()

gpshead
and
claude
committed

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