[GitHub] [james-project] chibenwa opened a new pull request #541: [PERFORMANCE] DropWizardMetricFactory: optimize wrapping monos

Wed, 14 Jul 2021 22:02:47 -0700 


chibenwa opened a new pull request #541:
URL: https://github.com/apache/james-project/pull/541


   ## Before
   
   ![Screenshot from 2021-07-15 
11-54-37](https://user-images.githubusercontent.com/6928740/125730891-2b7d7474-99c2-44c7-bf57-bbe722fdfa29.png)
   
   A good part of applicative CPU is used calling cancels on fluxes to get back 
a mono.
   
   Zoom:
   
   ![Screenshot from 2021-07-15 
11-55-55](https://user-images.githubusercontent.com/6928740/125730978-ebc5c0cf-0931-4bc4-8d43-17a7b8b2df24.png)
   
   Here is the associated gatling result:
   
   ![Screenshot from 2021-07-15 
11-56-43](https://user-images.githubusercontent.com/6928740/125731036-af039d73-57f5-458b-940f-6d14be1f9029.png)
   
   ## After
   
   Most of the cancels are gone (remains the ones of the authentication 
strategy)
   
   ![Screenshot from 2021-07-15 
11-57-45](https://user-images.githubusercontent.com/6928740/125731125-dd39b597-da91-4685-90b3-57712bfa8a0a.png)
   
   Which translates with better gating perfs (~10% mean time and ~7% p99 
decrease, ~0.5% throughput increase)


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