diff --git a/internal/stupidgcm/benchmark.bash b/internal/stupidgcm/benchmark.bash
new file mode 100755
index 0000000..d2678a7
--- /dev/null
+++ b/internal/stupidgcm/benchmark.bash
@@ -0,0 +1,7 @@
+#!/bin/bash
+
+set -eu
+
+cd "$(dirname "$0")"
+
+go test -bench .