diff --git a/jmh/run.sh b/jmh/run.sh
new file mode 100644
index 0000000..236dc2d
--- /dev/null
+++ b/jmh/run.sh
@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+# Build and run the JMH benchmarks (the numbers worth defending).
+#   ./run.sh                -> all benchmarks
+#   ./run.sh MaskedBench    -> one class
+set -euo pipefail
+cd "$(dirname "$0")"
+mvn -q -B clean package
+java --add-modules jdk.incubator.vector -jar target/benchmarks.jar "$@"