update benchmarks

benchmark/lib/set-get-delete-string/v4.js

@@ -0,0 +1,20 @@
+import { createClient } from '@node-redis/client';
+
+export default async (host, { randomString }) => {
+    const client = createClient({ host });
+
+    await client.connect();
+
+    return {
+        benchmark() {
+            return Promise.all([
+                client.set(randomString, randomString),
+                client.get(randomString),
+                client.del(randomString)
+            ]);
+        },
+        teardown() {
+            return client.disconnect();
+        }
+    };
+};