MeowRay@hachyderm.io@HaskRay
Sep 20
Linking clang 21 with lld/mold/wild at 1-16 threads on Intel Core i7-14700K (8P+12E cores). Built around Sep 12

mold & wild lose ~30-40% when 2 threads share one P-core's SMT pair vs 2 distinct cores - real parallel linkers. ld.lld shows zero SMT sensitivity.
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MeowRay@hachyderm.io@HaskRay
Sep 20
Replying to @HaskRay
Linking chrome-release (--gc-sections --export-dynamic, no ICF) with lld/mold/wild
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MeowRay@hachyderm.io@HaskRay
Sep 20
Replying to @HaskRay
Output in tmpfs. --no-fork.

mold: use system libmimalloc.so.3.5 --no-fork
lld: LLVM_ENABLE_PIC=off, CMAKE_EXE_LINKER_FLAGS=-lmimalloc

Ensured there is no fallocate / transparent-huge-pages cheat.

Sep 20, 2026 · 2:35 AM UTC

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