perf(bench): add optional mimalloc allocator for sp1-perf (-7.2% fib)#2728
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Add mimalloc as an optional feature for sp1-perf. When enabled, replaces glibc malloc with mimalloc's per-thread arenas, reducing lock contention in allocation-heavy paths. Benchmark results (on top of physical-cores change): fib: 28,551ms → 26,504ms (-7.2%) keccak: 35,648ms → 34,845ms (-2.3%) big: 38,228ms → 37,899ms (-0.9%) Usage: cargo build --release -p sp1-perf --features mimalloc Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
mimallocas optional feature forsp1-perfBenchmark results (on top of physical-cores change)
Usage
Stack
available_parallelism#2727 — E1: rayon defaults to physical cores (-19.8% big)Test plan
cargo build -p sp1-perfworks without mimalloc (no behavior change)cargo build -p sp1-perf --features mimalloccompiles and runs🤖 Generated with Claude Code