diff --git a/.github/workflows/benchmark.yml b/.github/workflows/benchmark.yml
index 364c2cb7..f6b18d46 100644
--- a/.github/workflows/benchmark.yml
+++ b/.github/workflows/benchmark.yml
@@ -20,5 +20,11 @@ jobs:
         uses: mobiledevops/xcode-select-version-action@v1
         with:
           xcode-select-version: 15.2
+      - name: macOS version
+        run: sw_vers
+      - name: disk write
+        run: time dd if=/dev/zero bs=1024k of=tstfile count=1024
+      - name: disk read
+        run: dd if=tstfile bs=1024k of=/dev/null count=1024
       - name: Run benchmark
         run: sh benchmark.sh