update benchmarks

benchmark/lib/ping/ioredis.js

@@ -0,0 +1,19 @@
+import Redis from 'ioredis';
+
+export default async (host) => {
+    const client = new Redis({
+        host,
+        lazyConnect: true
+    });
+
+    await client.connect();
+
+    return {
+        benchmark() {
+            return client.ping();
+        },
+        teardown() {
+            return client.disconnect();
+        }
+    }
+};