Software1 hOctober 17, 2026, 21:53

Python 3.15 speeds up Base32 135x but slows Base16 by 22%

pyperformance benchmarks on a Ryzen 9 7900 running Windows 11 show Python 3.15 encoding Base32 135x faster, Ascii85 69x faster, Base85 63x faster and Base64 3.6x faster thanks to C rewrites. Base16 regressed 22.3% versus Python 3.14 because it was not rewritten in C.

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Base32_large: 2.43 ms in 3.15 vs 327.6 ms in 3.14
Ascii85_large: 11.62 ms vs 797.9 ms, a 69x speedup
Base16_large slowed from 4.714 to 5.767 ms (+22.3%)
Base64_large: 1.852 ms vs 6.746 ms in 3.14

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Python 3.15 released with JIT, lazy imports, and frozendict

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Python 3.15 released with default UTF-8 support on all platforms

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Python 3.15: test shows lazy import defers the delay, not removes it

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Python 3.15 speeds up Base32 135x but slows Base16 by 22%

Python 3.15 released with JIT, lazy imports, and frozendict

Python 3.15 released with default UTF-8 support on all platforms

Python 3.15: test shows lazy import defers the delay, not removes it

Open source roundup: Python 3.15, OpenSSH 10.6 and LineageOS 24.0