improve encodeCommand performance, add set-get-delete-string benchmark

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

@@ -0,0 +1,19 @@
+import Redis from 'ioredis';
+
+const client = new Redis({ lazyConnect: true });
+
+export function setup() {
+    return client.connect();
+}
+
+export function benchmark({ randomString }) {
+    return Promise.all([
+        client.set(randomString, randomString),
+        client.get(randomString),
+        client.del(randomString)
+    ]);
+}
+
+export function teardown() {
+    return client.disconnect();
+}