Add size-benchmark crate with FFI coverage and CI integration#1920

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Eldolfin wants to merge 15 commits into

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oscarld/size-bench-syn-experiment-APMSP-2733

Commits on Apr 24, 2026

feat(size-benchmark): add syn-based FFI coverage binary generator
Eldolfin
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feat(size-benchmark): simplify to pure function-pointer array approach
Eldolfin
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feat(size-benchmark): add size-optimized build script for CI
Eldolfin
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fix(size-benchmark): use native arch target, avoid cross-compilation
Eldolfin
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feat(size-benchmark): add release-size profile with opt-level=z, strip, panic=abort
Eldolfin
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fix(size-benchmark): use build-std-features=optimize_for_size
Eldolfin
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feat(size-benchmark): add compare-size.sh for PR binary size diffing
Eldolfin
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fix(size-benchmark): share cargo target dir between base and head builds
Eldolfin
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ci: add binary size comparison workflow for pull requests
Eldolfin
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fix(ci): use enterprise-allowed action SHAs, replace sticky comment with github-script
Eldolfin
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fix(size-benchmark): always use head's build script, support WORKSPACE_ROOT override
Eldolfin
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fix(size-benchmark): stable worktree paths for cache hits, merge-base for base ref
Eldolfin
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fix(size-benchmark): handle missing base crate gracefully, improve cache config
Eldolfin
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fix(size-benchmark): revert to build-std-features= to strip backtrace, fix musl link
Eldolfin
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fix(size-benchmark): use linux-gnu target on Linux, musl incompatible with workspace C libs
Eldolfin
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