python-build-standalone enables full LTO for CPython 3.12+, modestly boosting runtime

charliermarsh · x · 2026-09-22

Charlie Marsh announced that python-build-standalone now uses full LTO for CPython 3.12 and later, which should modestly improve runtime performance. He also notes CPython defaults to ThinLTO when building with clang on 3.12+, making full LTO a meaningful change.

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