added cahcing

.github/workflows/ci-bench.yml

@@ -28,7 +28,17 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - uses: actions-rust-lang/setup-rust-toolchain@v1
-
+    # From: https://github.com/actions/cache/blob/main/examples.md#rust---cargo
+    - uses: actions/cache@v4
+      with:
+        path: |
+          ~/.cargo/bin/
+          ~/.cargo/registry/index/
+          ~/.cargo/registry/cache/
+          ~/.cargo/git/db/
+          target/
+        key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+
     - name: Run benchmark
       run: |
         cd examples