cache valgrind and don't run apt-get update for cargo-codspeed

Author: Boshen

action.yml

@@ -91,3 +91,26 @@ runs:
       if: ${{ inputs.tools }}
       with:
         tool: ${{ inputs.tools }}
+
+    # `cargo codspeed run` takes time to download `valgrind-codspeed` (20MB), cache it.
+    # https://github.com/CodSpeedHQ/runner/blob/v4.0.1/src/run/runner/valgrind/setup.rs
+    - name: Cache Valgrind .deb package
+      uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # 4.3.0
+      id: cache-valgrind
+      if: ${{ runner.os == 'Linux' && contains(inputs.tools, 'cargo-codspeed') }}
+      with:
+        path: ~/valgrind-codspeed.deb
+        key: valgrind-3.24.0-0codspeed1-ubuntu-24.04
+
+    - name: Download Valgrind
+      if: ${{ runner.os == 'Linux' && contains(inputs.tools, 'cargo-codspeed') && steps.cache-valgrind.outputs.cache-hit != 'true' }}
+      shell: bash
+      run: |
+        curl -L https://github.com/CodSpeedHQ/valgrind-codspeed/releases/download/3.24.0-0codspeed1/valgrind_3.24.0-0codspeed1_ubuntu-24.04_amd64.deb \
+          -o ~/valgrind-codspeed.deb
+
+    # `cargo codspeed run` takes 1-2 minutes to run `cargo-codspeed`
+    - name: Install Valgrind
+      if: ${{ runner.os == 'Linux' && contains(inputs.tools, 'cargo-codspeed') }}
+      shell: bash
+      run: sudo apt-get install --allow-downgrades -y ~/valgrind-codspeed.deb