feat: Add some benches and integrate with Cosdpeed

Author: larseggert

.github/workflows/rust.yml

@@ -6,6 +6,7 @@ on:
   pull_request:
     branches: ["main"]
   merge_group:
+  workflow_dispatch: # allows CodSpeed to trigger backtest performance analysis
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
@@ -30,7 +31,7 @@ jobs:
           tools: cargo-llvm-cov
           token: ${{ github.token }}
       - name: Run tests and determine coverage
-        run: cargo llvm-cov test --codecov --output-path codecov.json
+        run: cargo llvm-cov test --all-targets --codecov --output-path codecov.json
       - uses: codecov/codecov-action@671740ac38dd9b0130fbe1cec585b89eea48d3de # v5.5.2
         with:
           files: codecov.json
@@ -41,6 +42,32 @@ jobs:
         env:
           CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }} # zizmor: ignore[secrets-outside-env]
 
+  benchmarks:
+    name: Benchmarks (${{ matrix.mode }})
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      id-token: write # for OpenID Connect authentication with CodSpeed
+    strategy:
+      matrix:
+        mode: [simulation, memory]
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+      - uses: mozilla/actions/rust@b6b1031d2072eb8c2b181887cb5e194ebcc5caab # v1.0.4
+        with:
+          tools: cargo-codspeed
+          token: ${{ github.token }}
+      - name: Build benchmarks
+        run: cargo codspeed build --bench happy_eyeballs
+      - name: Run benchmarks
+        uses: CodSpeedHQ/action@1c8ae4843586d3ba879736b7f6b7b0c990757fab # v4.12.1
+        with:
+          run: cargo codspeed run
+          mode: ${{ matrix.mode }}
+          token: ${{ secrets.CODSPEED_TOKEN }} # zizmor: ignore[secrets-outside-env]
+
   rustfmt:
     uses: mozilla/actions/.github/workflows/rustfmt.yml@b6b1031d2072eb8c2b181887cb5e194ebcc5caab # v1.0.4