diff --git a/src/bin/cpubench.ts b/src/bin/cpubench.ts
index b1629ee..e53d5c3 100644
--- a/src/bin/cpubench.ts
+++ b/src/bin/cpubench.ts
@@ -77,6 +77,7 @@ const proc = spawn(
         "--rebuild=1",
         "-i=1",
         `--work_dir=${workdir}`,
+        `--perf=1`,
     ],
     { cwd: cpubenchDir }
 );