size: gate keepalive anchors out of the classic link + opt-in size-optimized runtime rebuild (hello world 5.9→4.6 MB default, 2.3 MB size mode) - #6917

Merged

proggeramlug merged 12 commits into

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size/anchor-gate-and-size-opt

Jul 28, 2026

Commits on Jul 28, 2026

size: PERRY_SIZE_OPT=z|s knob — rebuild auto-opt runtime/stdlib at -C opt-level=z/s (cache-keyed)
Ralph Küpper
committed
576443b
size: PERRY_SIZE_LTO=fat — fat-LTO + cu=1 variant of the size-opt archive rebuild
Ralph Küpper
committed
727372f
size: re-export size_lto_fat
Ralph Küpper
committed
b6683f7
size: fat LTO via CARGO_PROFILE_RELEASE_LTO env (RUSTFLAGS -C lto breaks rlib deps)
Ralph Küpper
committed
ade3262
link: PERRY_EXTRA_LINK_ARGS diagnostic passthrough
Ralph Küpper
committed
244976f
size: gate the 487 #[used] keepalive anchors behind new keepalive-anchors feature (bitcode-LTO only)
Ralph Küpper
committed
1529d46
size: feature-gate mimalloc global allocator (alloc-mimalloc, default-on; dropped in PERRY_SIZE_OPT rebuilds)
Ralph Küpper
committed
d8adf5d
docs+changelog: size-optimized build knobs
Ralph Küpper
committed
b97db0a
test: update keepalive-anchor audit for cfg_attr-gated form
Ralph Küpper
committed
abb96ae
changelog: name fragment after PR (#6917)
Ralph Küpper
committed
8248536
fix(size): keep mimalloc in size-mode rebuilds (system-alloc misclassifies heap bands — silent output loss); key PERRY_EXTRA_LINK_ARGS into link cache; mirror size opt-level into bitcode emission; …
Ralph Küpper
committed
62b32db
docs+changelog: corrected size-mode numbers (2.4 MB, mimalloc retained)
Ralph Küpper
committed
35540de