zccache benchmark stats

Generated 2026-08-26T10:09:23+00:00 | ref main | sha 63af69f8419f | workflow run

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Latest zccache Emscripten benchmark stats — Emscripten

Latest zccache Rust benchmark stats — Rust

Scenario	Bare compiler	sccache	zccache	bare cache	sccache cache	zccache cache	zccache vs sccache	zccache vs bare
C inline args
Single-file, Cold	1.912s	3.535s	2.847s	0 B	576 KiB	124 KiB	1.2x faster	1.5x slower
Single-file, Warm	1.928s	0.185s	0.094s	0 B	576 KiB	208 KiB	2.0x faster	20.5x faster
C static-library link
Static archive, Cold	0.051s	0.050s	0.056s	0 B	0 B	369 KiB	1.1x slower	1.1x slower
Static archive, Warm	0.050s	0.051s	0.001s	0 B	0 B	374 KiB	51.0x faster	50.0x faster
C++ inline args
Single-file, Cold	6.626s	9.269s	7.272s	0 B	0 B	231 KiB	1.3x faster	1.1x slower
Single-file, Warm	6.669s	0.226s	0.100s	0 B	0 B	231 KiB	2.3x faster	66.7x faster
Multi-file, Cold	6.580s	6.616s	7.533s	0 B	0 B	231 KiB	1.1x slower	1.1x slower
Multi-file, Warm	6.560s	6.436s	0.016s	0 B	0 B	231 KiB	402.2x faster	410.0x faster
C++ response files
Single-file RSP, Cold	6.632s	9.391s	7.946s	0 B	0 B	714 KiB	1.2x faster	1.2x slower
Single-file RSP, Warm	6.644s	0.222s	0.172s	0 B	0 B	714 KiB	1.3x faster	38.6x faster
Multi-file RSP, Cold	6.537s	6.561s	7.577s	0 B	0 B	714 KiB	1.2x slower	1.2x slower
Multi-file RSP, Warm	6.550s	6.559s	0.038s	0 B	0 B	714 KiB	172.6x faster	172.4x faster
C++ sibling git remap
Sibling-workspace no __FILE__, Warm	6.518s	0.219s	0.149s	0 B	1.7 MiB	553 KiB	1.5x faster	43.7x faster
Sibling-workspace with __FILE__, Warm	6.492s	9.128s	0.153s	0 B	1.8 MiB	1.0 MiB	59.7x faster	42.4x faster
C++ driver link
Driver link, Cold	0.055s	0.080s	0.065s	0 B	0 B	85 KiB	1.2x faster	1.2x slower
Driver link, Warm	0.055s	0.060s	0.001s	0 B	0 B	90 KiB	60.0x faster	55.0x faster
Emscripten em++
Single-file, Cold	5.981s	10.536s	7.357s	0 B	0 B	172 KiB	1.4x faster	1.2x slower
Single-file, Warm	5.974s	0.254s	0.107s	0 B	0 B	172 KiB	2.4x faster	55.8x faster
Multi-file, Cold	2.886s	3.005s	3.818s	0 B	0 B	172 KiB	1.3x slower	1.3x slower
Multi-file, Warm	2.862s	2.896s	0.018s	0 B	0 B	172 KiB	160.9x faster	159.0x faster
Emscripten sibling git remap
Sibling-workspace, Warm	6.051s	0.285s	0.164s	0 B	1.8 MiB	1.8 MiB	1.7x faster	36.9x faster
Emscripten link
HTML link, Cold	0.314s	0.480s	0.330s	0 B	0 B	71 KiB	1.5x faster	1.1x slower
HTML link, Warm	0.315s	0.321s	0.001s	0 B	0 B	98 KiB	321.0x faster	315.0x faster
Wasm link, Cold	0.142s	0.303s	0.154s	0 B	0 B	2.1 KiB	2.0x faster	1.1x slower
Wasm link, Warm	0.143s	0.152s	0.001s	0 B	0 B	6.5 KiB	152.0x faster	143.0x faster
Rust rustc
Build, Cold	1.677s	1.876s	4.778s	0 B	0 B	3.0 MiB	2.5x slower	2.8x slower
Build, Warm	1.696s	1.782s	1.559s	0 B	0 B	3.0 MiB	1.1x faster	1.1x faster
Check, Cold	0.960s	1.158s	2.474s	0 B	0 B	522 KiB	2.1x slower	2.6x slower
Check, Warm	0.932s	1.052s	0.632s	0 B	0 B	522 KiB	1.7x faster	1.5x faster
Rust sibling git remap
Sibling-workspace, Warm	1.645s	1.772s	0.689s	0 B	0 B	3.4 MiB	2.6x faster	2.4x faster
Rust workspace link
Workspace staticlib link, Cold	0.042s	0.134s	0.093s	0 B	0 B	33 MiB	1.4x faster	2.2x slower
Workspace staticlib link, Warm	0.042s	0.046s	0.010s	0 B	0 B	47 MiB	4.6x faster	4.2x faster

Environment

Runner: Linux-6.17.0-1022-azure-x86_64-with-glibc2.39
Benchmark command: soldr --no-cache cargo test -p zccache --test perf_bench_test -- perf_c_zccache_vs_bare --nocapture --ignored --test-threads=1 ; soldr --no-cache cargo test -p zccache --test perf_bench_test -- perf_c_archive_link --nocapture --ignored --test-threads=1 ; soldr --no-cache cargo test -p zccache --test perf_bench_test -- perf_warm_cache_zccache_vs_sccache --nocapture --ignored --test-threads=1 ; soldr --no-cache cargo test -p zccache --test perf_bench_test -- perf_response_file --nocapture --ignored --test-threads=1 ; soldr --no-cache cargo test -p zccache --test perf_bench_test -- perf_cpp_sibling_remap_warm --nocapture --ignored --test-threads=1 ; soldr --no-cache cargo test -p zccache --test perf_bench_test -- perf_cpp_driver_link --nocapture --ignored --test-threads=1 ; soldr --no-cache cargo test -p zccache --test perf_bench_test -- perf_emcc_warm_cache_zccache_vs_sccache --nocapture --ignored --test-threads=1 ; soldr --no-cache cargo test -p zccache --test perf_bench_test -- perf_emcc_sibling_remap_warm --nocapture --ignored --test-threads=1 ; soldr --no-cache cargo test -p zccache --test perf_bench_test -- perf_emcc_link --nocapture --ignored --test-threads=1 ; soldr --no-cache cargo test -p zccache --test perf_bench_test -- perf_rustc_zccache_vs_sccache --nocapture --ignored --test-threads=1 ; soldr --no-cache cargo test -p zccache --test perf_bench_test -- perf_rustc_sibling_remap_warm --nocapture --ignored --test-threads=1 ; soldr --no-cache cargo test -p zccache --test perf_bench_test -- perf_rust_workspace_link --nocapture --ignored --test-threads=1
soldr: soldr 0.8.13
rustc: rustc 1.95.0 (59807616e 2026-04-14)
clang: Ubuntu clang version 18.1.3 (1ubuntu1)
sccache: sccache 0.17.0