zccache benchmark stats

Generated 2026-10-21T09:40:52+00:00 | ref main | sha 15ec9537af0d | ZCCACHE_MODE=REFLINK_OR_LINK_OR_COPY | workflow run

Raw machine-readable data: latest.json and history.jsonl. Per-language README images:

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	1.458s	2.842s	1.748s	0 B	576 KiB	127 KiB	1.6x faster	1.2x slower
Single-file, Warm	1.579s	106.943ms	6.825ms	0 B	576 KiB	212 KiB	15.7x faster	231.4x faster
C static-library link
Static archive, Cold	36.358ms	35.837ms	40.854ms	0 B	0 B	185 KiB	n/a	1.1x slower
Static archive, Warm	34.927ms	34.379ms	0.34ms	0 B	0 B	190 KiB	n/a	102.7x faster
C++ inline args
Single-file, Cold	5.362s	7.608s	5.552s	0 B	907 KiB	813 KiB	1.4x faster	1.0x slower
Single-file, Warm	5.324s	137.531ms	6.78ms	0 B	907 KiB	899 KiB	20.3x faster	785.3x faster
Multi-file, Cold (per-TU)	5.530s	7.589s	5.588s	0 B	907 KiB	231 KiB	1.4x faster	1.0x slower
Multi-file, Warm	5.238s	5.164s	6.011ms	0 B	0 B	236 KiB	n/a	871.4x faster
C++ response files
Single-file RSP, Cold	5.385s	7.664s	5.727s	0 B	919 KiB	1.2 MiB	1.3x faster	1.1x slower
Single-file RSP, Warm	5.288s	155.68ms	23.165ms	0 B	919 KiB	1.3 MiB	6.7x faster	228.3x faster
Multi-file RSP, Cold (per-TU)	5.337s	7.825s	5.717s	0 B	919 KiB	225 KiB	1.4x faster	1.1x slower
Multi-file RSP, Warm	5.215s	5.303s	11.246ms	0 B	0 B	226 KiB	n/a	463.7x faster
Emscripten em++
Single-file, Cold	5.009s	9.369s	5.590s	0 B	1.8 MiB	1.8 MiB	1.7x faster	1.1x slower
Single-file, Warm	5.062s	164.308ms	8.711ms	0 B	1.8 MiB	1.9 MiB	18.9x faster	581.0x faster
Multi-file, Cold (per-TU)	5.094s	9.494s	2.816s	0 B	1.8 MiB	172 KiB	3.4x faster	1.8x faster
Multi-file, Warm	2.144s	2.165s	7.112ms	0 B	0 B	177 KiB	n/a	301.5x faster
C++ driver link
Driver link, Cold	53.45ms	101.981ms	58.154ms	0 B	0 B	977 B	n/a	1.1x slower
Driver link, Warm	54.179ms	56.22ms	0.292ms	0 B	0 B	48 KiB	n/a	185.8x faster
Emscripten link
HTML link, Cold	288.483ms	563.525ms	300.387ms	0 B	0 B	72 KiB	n/a	1.0x slower
HTML link, Warm	294.286ms	297.308ms	0.366ms	0 B	0 B	77 KiB	n/a	804.5x faster
Wasm link, Cold	136.913ms	438.783ms	135.471ms	0 B	0 B	1012 B	n/a	1.0x faster
Wasm link, Warm	132.782ms	135.773ms	0.288ms	0 B	0 B	6.5 KiB	n/a	461.7x faster
Rust workspace link
Workspace staticlib link, Cold	29.952ms	108.331ms	55.663ms	0 B	0 B	32.4 MiB	1.9x faster	1.9x slower
Workspace staticlib link, Warm	30.053ms	33.647ms	7.321ms	0 B	0 B	46.6 MiB	n/a	4.1x faster
Rust rustc
Build, Cold	1.472s	2.660s	1.546s	0 B	1.0 MiB	2.9 MiB	1.7x faster	1.1x slower
Build, Warm	1.400s	871.992ms	16.9ms	0 B	1.0 MiB	3.0 MiB	51.6x faster	82.8x faster
Check, Cold	618.774ms	1.715s	851.593ms	0 B	104 KiB	378 KiB	2.0x faster	1.4x slower
Check, Warm	618.942ms	879.972ms	14.99ms	0 B	104 KiB	515 KiB	58.7x faster	41.3x faster
C++ sibling git remap
Sibling-workspace no __FILE__, Warm	5.220s	135.877ms	15.329ms	0 B	1.7 MiB	1.2 MiB	8.9x faster	340.5x faster
Sibling-workspace with __FILE__, Warm	5.293s	7.651s	15.603ms	0 B	1.8 MiB	1.2 MiB	n/a	339.2x faster
Emscripten sibling git remap
Sibling-workspace, Warm	5.030s	146.267ms	16.344ms	0 B	1.8 MiB	2.3 MiB	8.9x faster	307.7x faster
Rust sibling git remap
Sibling-workspace, Warm	1.388s	901.139ms	21.892ms	0 B	1.0 MiB	3.4 MiB	41.2x faster	63.4x faster

Environment

Runner: Linux-7.0.0-1017-azure-x86_64-with-glibc2.39
Benchmark command: soldr --no-cache cargo test --release -p zccache --test perf_bench_test -- perf_c_zccache_vs_bare --nocapture --ignored --test-threads=1 ; soldr --no-cache cargo test --release -p zccache --test perf_bench_test -- perf_c_archive_link --nocapture --ignored --test-threads=1 ; soldr --no-cache cargo test --release -p zccache --test perf_bench_test -- perf_warm_cache_zccache_vs_sccache --nocapture --ignored --test-threads=1 ; soldr --no-cache cargo test --release -p zccache --test perf_bench_test -- perf_response_file --nocapture --ignored --test-threads=1 ; soldr --no-cache cargo test --release -p zccache --test perf_bench_test -- perf_cpp_sibling_remap_warm --nocapture --ignored --test-threads=1 ; soldr --no-cache cargo test --release -p zccache --test perf_bench_test -- perf_cpp_driver_link --nocapture --ignored --test-threads=1 ; soldr --no-cache cargo test --release -p zccache --test perf_bench_test -- perf_emcc_warm_cache_zccache_vs_sccache --nocapture --ignored --test-threads=1 ; soldr --no-cache cargo test --release -p zccache --test perf_bench_test -- perf_emcc_sibling_remap_warm --nocapture --ignored --test-threads=1 ; soldr --no-cache cargo test --release -p zccache --test perf_bench_test -- perf_emcc_link --nocapture --ignored --test-threads=1 ; soldr --no-cache cargo test --release -p zccache --test perf_bench_test -- perf_rustc_zccache_vs_sccache --nocapture --ignored --test-threads=1 ; soldr --no-cache cargo test --release -p zccache --test perf_bench_test -- perf_rustc_sibling_remap_warm --nocapture --ignored --test-threads=1 ; soldr --no-cache cargo test --release -p zccache --test perf_bench_test -- perf_rust_workspace_link --nocapture --ignored --test-threads=1
soldr: soldr broker endpoint: ci=github_actions executable=/home/runner/.soldr/broker/soldr-broker logical=/home/runner/.soldr/broker/soldr-broker.sock bind=/home/runner/.soldr/broker/soldr-broker.sock log=/home/runner/.soldr/broker/broker-spawn.log
rustc: rustc 1.95.0 (59807616e 2026-04-14)
clang: Ubuntu clang version 18.1.3 (1ubuntu1)
sccache: sccache 0.18.0