ci: initial benchmarking workflows

Signed-off-by: NotAShelf <raf@notashelf.dev>
Change-Id: I367444097eafbd1020c02707c42351bf6a6a6964

.github/workflows/hotpath-comment.yml

@@ -0,0 +1,57 @@
+name: Hotpath Comment
+
+on:
+  workflow_run:
+    workflows: ["Hotpath Profile"]
+    types:
+      - completed
+
+permissions:
+  pull-requests: write
+
+jobs:
+  comment:
+    runs-on: ubuntu-latest
+    if: ${{ github.event.workflow_run.conclusion == 'success' }}
+    
+    steps:
+      - name: Download profiling results
+        uses: actions/download-artifact@v4
+        with:
+          name: hotpath-results
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          run-id: ${{ github.event.workflow_run.id }}
+      
+      - name: Read PR number
+        id: pr
+        run: echo "number=$(cat pr_number.txt)" >> $GITHUB_OUTPUT
+      
+      - name: Setup Rust
+        uses: actions-rust-lang/setup-rust-toolchain@v1
+      
+      - name: Install hotpath CLI
+        run: cargo install hotpath
+      
+      - name: Post timing comparison comment
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          hotpath profile-pr \
+            --repo ${{ github.repository }} \
+            --pr-number ${{ steps.pr.outputs.number }} \
+            --head-json head-timing.json \
+            --base-json base-timing.json \
+            --mode timing \
+            --title "⏱️ Hotpath Timing Profile"
+      
+      - name: Post allocation comparison comment
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          hotpath profile-pr \
+            --repo ${{ github.repository }} \
+            --pr-number ${{ steps.pr.outputs.number }} \
+            --head-json head-alloc.json \
+            --base-json base-alloc.json \
+            --mode alloc \
+            --title "📊 Hotpath Allocation Profile"

.github/workflows/hotpath-profile.yml

@@ -0,0 +1,63 @@
+name: Hotpath Profile
+
+on:
+  pull_request:
+    branches: [ "main" ]
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  profile:
+    runs-on: ubuntu-latest
+    
+    steps:
+      - name: Checkout PR HEAD
+        uses: actions/checkout@v4
+      
+      - name: Setup Rust
+        uses: actions-rust-lang/setup-rust-toolchain@v1
+      
+      - name: Run timing profiling on HEAD
+        env:
+          HOTPATH_JSON: "true"
+        run: |
+          cargo run --features='hotpath' 2>&1 | grep '^{"hotpath_profiling_mode"' > head-timing.json
+      
+      - name: Run allocation profiling on HEAD
+        env:
+          HOTPATH_JSON: "true"
+        run: |
+          cargo run --features='hotpath,hotpath-alloc-count-total' 2>&1 | grep '^{"hotpath_profiling_mode"' > head-alloc.json
+      
+      - name: Checkout base branch
+        uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.pull_request.base.sha }}
+      
+      - name: Run timing profiling on base
+        env:
+          HOTPATH_JSON: "true"
+        run: |
+          cargo run --features='hotpath' 2>&1 | grep '^{"hotpath_profiling_mode"' > base-timing.json
+      
+      - name: Run allocation profiling on base
+        env:
+          HOTPATH_JSON: "true"
+        run: |
+          cargo run --features='hotpath,hotpath-alloc-count-total' 2>&1 | grep '^{"hotpath_profiling_mode"' > base-alloc.json
+      
+      - name: Save PR number
+        run: echo "${{ github.event.number }}" > pr_number.txt
+      
+      - name: Upload profiling results
+        uses: actions/upload-artifact@v4
+        with:
+          name: hotpath-results
+          path: |
+            head-timing.json
+            head-alloc.json
+            base-timing.json
+            base-alloc.json
+            pr_number.txt
+          retention-days: 1