ci: Add benchmark run

.github/workflows/bench.yml

@@ -0,0 +1,43 @@
+name: Bench
+on:
+  workflow_run:
+    workflows: ["CI"]
+    types: [completed]
+env:
+  CARGO_TERM_COLOR: always
+  RUST_BACKTRACE: 1
+
+jobs:
+  bench:
+    name: Benchmark
+    runs-on: self-hosted
+    if: ${{ github.event.workflow_run.conclusion == 'success' }}
+    steps:
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: stable
+          # components: rustfmt, clippy, llvm-tools-preview
+
+      - name: Use sccache
+        uses: mozilla-actions/[email protected]
+
+      - name: Enable sscache
+        run: |
+          echo "SCCACHE_GHA_ENABLED=true" >> "$GITHUB_ENV"
+          echo "RUSTC_WRAPPER=sccache" >> "$GITHUB_ENV"
+
+      - name: Install dependencies (Linux)
+        env:
+          DEBIAN_FRONTEND: noninteractive
+        run: |
+          sudo apt-get install -y --no-install-recommends gyp mercurial ninja-build lld
+          echo "RUSTFLAGS=-C link-arg=-fuse-ld=lld" >> "$GITHUB_ENV"
+
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Build
+        run: |
+          cargo bench --features ci,bench
+

Cargo.toml

@@ -21,3 +21,8 @@ license = "MIT OR Apache-2.0"
 # Don't increase beyond what Firefox is currently using:
 # https://firefox-source-docs.mozilla.org/writing-rust-code/update-policy.html#schedule
 rust-version = "1.74.0"
+
+[profile.bench]
+# Inherits from the "release" profile, so just provide overrides here:
+# https://doc.rust-lang.org/cargo/reference/profiles.html#release
+debug = true