ruby on rails 4 - Load testing results on blitz.io and new relic for the same config show different queuing times -


i testing rails 4.0 app on blitz.io , new relic..

blitz: 200 users, 4000 timeout, in 60sec. heroku: 20 dynos (2x standard dynos). database: postgresql 200 connections plan using unicorn @ 7 processes(new relic shows app uses 140mb, 2x standard dyno, 1gb, , 1024/140 7. link ref in below line) ref: http://blog.bignerdranch.com/2188-how-to-improve-rails-application-performance-on-heroku/

for same config , multiple tests see response queuing in new relic ranging 240ms 443ms. know why varying much. else should monitoring. how can reduce atleast 50ms? ideal response queuing time?

thanks


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