Add CI for benchmarks

.github/workflows/benchmarks.yml

@@ -0,0 +1,63 @@
+name: Benchmarks
+
+on:
+  workflow_dispatch:
+    inputs:
+      dataset_name:
+        description: 'The name of the dataset used to benchmark (songs or wiki)'
+        required: false
+        default: 'songs'
+
+jobs:
+  benchmarks:
+    name: Run and upload benchmarks
+    runs-on: self-hosted
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          override: true
+
+      # Set variables
+      - name: Set current branch name
+        shell: bash
+        run: echo "##[set-output name=name;]$(echo ${GITHUB_REF#refs/heads/})"
+        id: current_branch
+      - name: Set normalized current branch name # Replace `/` by `_` in branch name to avoid issues when pushing to S3
+        shell: bash
+        run: echo "##[set-output name=name;]$(echo ${GITHUB_REF#refs/heads/} | tr '/' '_')"
+        id: normalized_current_branch
+      - name: Set shorter commit SHA
+        shell: bash
+        run: echo "##[set-output name=short;]$(echo $GITHUB_SHA | cut -c1-8)"
+        id: commit_sha
+      - name: Set file basename with format "dataset_branch_commitSHA"
+        shell: bash
+        run: echo "##[set-output name=basename;]$(echo ${{ github.event.inputs.dataset_name }}_${{ steps.normalized_current_branch.outputs.name }}_${{ steps.commit_sha.outputs.short }})"
+        id: file
+
+      # Run benchmarks
+      - name: Run benchmarks - Dataset ${{ github.event.inputs.dataset_name }} -  Branch ${{ steps.current_branch.outputs.name }} - Commit ${{ steps.commit_sha.outputs.short }}
+        run: |
+          cd benchmarks
+          cargo bench --bench ${{ github.event.inputs.dataset_name }} -- --save-baseline ${{ steps.file.outputs.basename }}
+
+      # Generate critcmpf files
+      - name: Install critcmp
+        run: cargo install critcmp
+      - name: Export cripcmp file
+        run: |
+          critcmp --export ${{ steps.file.outputs.basename }} > ${{ steps.file.outputs.basename }}.json
+
+      # Upload benchmarks
+      - name: Upload to DO Spaces # DigitalOcean Spaces = S3
+        uses: BetaHuhn/do-spaces-action@v2
+        with:
+          access_key: ${{ secrets.DO_SPACES_ACCESS_KEY }}
+          secret_key: ${{ secrets.DO_SPACES_SECRET_KEY }}
+          space_name: ${{ secrets.DO_SPACES_SPACE_NAME }}
+          space_region: ${{ secrets.DO_SPACES_SPACE_REGION }}
+          source: ${{ steps.file.outputs.basename }}.json
+          out_dir: critcmp_results