perf: lessen wasting time for pubsub (#229) #545

Job	Run time
NAT-ted Environments	1m 6s
Main (7.0, 3.2)	1m 10s
Main (7.0, 3.2, compose.ssl.yaml)	1m 31s
Main (7.0, 3.2, hiredis)	1m 6s
Main (7.0, 3.2, hiredis, compose.ssl.yaml)	1m 19s
Main (7.0, 3.2, 2, compose.replica.yaml)	1m 9s
Main (7.0, 3.2, compose.auth.yaml)	1m 0s
Main (6.2, 3.1)	54s
Main (6.2, 3.0)	52s
Main (5.0, 2.7)	1m 10s
Main (jruby)	2m 0s
Main (truffleruby)	1m 18s
Main (test_cluster_state, 7.0, 2, compose.replica.yaml)	3m 3s
Main (test_cluster_state, 6.2, 2, compose.replica.yaml)	2m 51s
Main (test_cluster_broken, 7.0, no)	2m 3s
Main (test_cluster_broken, 6.2, no)	2m 2s
Main (test_cluster_scale, 7.0, compose.scale.yaml)	1m 50s
Main (test_cluster_scale, 6.2, compose.scale.yaml)	1m 51s
Lint	9s
Benchmark	2m 48s
Massive Cluster	2m 35s
Profiling (single)	37s
Profiling (excessive_pipelining)	34s
Profiling (pipelining_in_moderation)	38s
	35m 36s

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