fixup: cache build and fix cmd

Author: not-matthias

.github/workflows/codspeed.yml

@@ -25,6 +25,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           lfs: true
+      - uses: extractions/setup-just@v3
 
       # Skip installing package docs to avoid wasting time when installing build dependencies
       # See: https://github.com/actions/runner-images/issues/10977#issuecomment-2810713336
@@ -37,15 +38,24 @@ jobs:
           path-exclude /usr/share/info/*
           EOF
 
+      - name: Cache Valgrind build
+        uses: actions/cache@v4
+        id: valgrind-cache
+        with:
+          path: /tmp/valgrind-upstream
+          key: valgrind-${{ matrix.valgrind }}-${{ runner.os }}-build
+
       # Build and install Valgrind
       - name: Update apt-get cache
-        run: sudo apt-get update
+        if: steps.valgrind-cache.outputs.cache-hit != 'true'
+        run: | 
+          sudo apt-get update
 
-      # Remove any existing Valgrind installation to avoid conflicts
-      - name: Remove existing Valgrind installation
-        run: sudo apt-get remove -y valgrind || true
+          # Remove existing Valgrind installation
+          sudo apt-get remove -y valgrind || true
 
       - name: Install build dependencies
+        if: steps.valgrind-cache.outputs.cache-hit != 'true'
         run: |
           sudo apt-get install -y \
             build-essential \
@@ -58,8 +68,8 @@ jobs:
             docbook-xml \
             xsltproc
 
-      - uses: extractions/setup-just@v3
       - name: Build Valgrind (${{ matrix.valgrind }})
+        if: steps.valgrind-cache.outputs.cache-hit != 'true'
         run: just build ${{ matrix.valgrind }}
 
       - name: Verify Valgrind build
@@ -77,4 +87,4 @@ jobs:
           CODSPEED_PERF_ENABLED: false
         with:
           mode: walltime
-          run: ./bench/bench.py --cmd ${{ matrix.cmd }} --valgrind-path /usr/local/bin/valgrind
+          run: ./bench/bench.py --cmd "${{ matrix.cmd }}" --valgrind-path /usr/local/bin/valgrind