diff --git a/.github/workflows/benchmark.yml b/.github/workflows/benchmark.yml
index 2920016057e..675020f6ae4 100644
--- a/.github/workflows/benchmark.yml
+++ b/.github/workflows/benchmark.yml
@@ -25,6 +25,10 @@ jobs:
         run:
           npm ls -a -p | wc -l | tr -d ' \n' > .delta.dependencyCount && echo " (Dependency count)" >>
           .delta.dependencyCount
+      - name: Get TypeScript conversion progress
+        run:
+          grep -r --exclude-dir="node_modules" --include="*.mts" "@ts-expect-error" . | wc -l | xargs >
+          .delta.tsConversion && echo " (TypeScript conversion progress)" >> .delta.tsConversion
       - name: Save PR number
         if: github.event_name == 'pull_request'
         run: echo ${{ github.event.number }} > ./pr_number