ci: add async-redis to iterations per second for a benchmark

Gemfile

@@ -3,6 +3,7 @@
 source 'https://rubygems.org'
 gemspec name: 'redis-cluster-client'
 
+gem 'async-redis'
 gem 'benchmark-ips'
 gem 'hiredis-client', '~> 0.6'
 gem 'memory_profiler'

test/ips_single.rb

@@ -1,5 +1,6 @@
 # frozen_string_literal: true
 
+require 'async/redis/cluster_client'
 require 'benchmark/ips'
 require 'redis_cluster_client'
 require 'testing_constants'
@@ -20,6 +21,7 @@ def run
       envoy: envoy,
       cproxy: cluster_proxy
     )
+    async_bench(make_async_client)
   end
 
   def make_client
@@ -44,6 +46,11 @@ def make_client_for_cluster_proxy
     ).new_client
   end
 
+  def make_async_client
+    endpoints = TEST_NODE_URIS.map { |e| ::Async::Redis::Endpoint.parse(e) }
+    ::Async::Redis::ClusterClient.new(endpoints)
+  end
+
   def print_letter(title)
     print "################################################################################\n"
     print "# #{title}\n"
@@ -75,6 +82,26 @@ def bench(**kwargs)
       x.compare!
     end
   end
+
+  def async_bench(cluster)
+    Benchmark.ips do |x|
+      x.time = 5
+      x.warmup = 1
+
+      x.report('single: async') do
+        Async do
+          ATTEMPTS.times do |i|
+            key = "key#{i}"
+            slot = cluster.slot_for(key)
+            client = cluster.client_for(slot)
+            client.get(key)
+          end
+        end
+      end
+
+      x.compare!
+    end
+  end
 end
 
 IpsSingle.run