tests: run benchmarks in separate CI check (#238)

.github/workflows/rust.yml

@@ -45,6 +45,23 @@ jobs:
       - name: Run doc tests
         run: just doctest
 
+  bench:
+    name: Run benchmarks
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v4
+
+      - name: Install Rust toolchain
+        uses: moonrepo/setup-rust@v1
+        with:
+          bins: cargo-nextest,just
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Run benchmarks in test mode
+        run: just test-bench
+
   test-book:
     name: Test Book
     runs-on: ubuntu-latest

justfile

@@ -19,14 +19,25 @@ test:
     --exclude *-js \
     --exclude pyaugurs
 
-# Run all unit and integration tests, plus examples and benchmarks, except for those which require `iai` (which isn't available on all platforms) and the Prophet benchmarks which require a STAN installation.
+# Run all unit and integration tests, plus examples, except for those which require `iai` (which isn't available on all platforms) and the Prophet benchmarks which require a STAN installation.
 test-all:
   cargo nextest run \
     --all-features \
     --all-targets \
     --workspace \
     --exclude *-js \
     --exclude pyaugurs \
+    -E 'not (binary(/iai/) | binary(/prophet-cmdstan/) | kind(bench))'
+
+# Run benchmarks in "test mode" (but with optimizations) using nextest.
+test-bench:
+  cargo nextest run \
+    --release \
+    --all-features \
+    --benches \
+    --workspace \
+    --exclude *-js \
+    --exclude pyaugurs \
     -E 'not (binary(/iai/) | binary(/prophet-cmdstan/))'
 
 doctest: