[GitHub] [shardingsphere] TeslaCN opened a new issue #13848: Consider replacing java.util.stream with for each in high frequency codes

Mon, 29 Nov 2021 00:35:12 -0800 


TeslaCN opened a new issue #13848:
URL: https://github.com/apache/shardingsphere/issues/13848


   ## Refactor
   
   ## Testing
   
   Using BenchmarkSQL (adapts ShardingSphere JDBC) connects to single node 
openGauss.
   ShardingSphere JDBC sharding data to 1 shards, which means the data was not 
sharded.
   
   Terminals: 696 
   Runs for 5 min.
   
   ## Measured tpmC
   
   ### Connects to openGauss directly
   
![image](https://user-images.githubusercontent.com/20503072/143833791-4a5d7d47-eaf4-4207-b994-5a33050db8b8.png)
   
   ### ShardingSphere JDBC master branch
   commit 93f116da950ea0173b1c8d9faec20d9f91e04846
   
![image](https://user-images.githubusercontent.com/20503072/143833814-6bb70be5-f73f-4c9f-8b8c-80361268ada5.png)
   
   ### ShardingSphere JDBC reduced stream
   Refer to #13845 
   
![image](https://user-images.githubusercontent.com/20503072/143833837-f3da3527-60be-46fe-9f51-fcbd4b3c9f03.png)
   
   
   ## Profiling
   
   ### Master branch
   commit 93f116da950ea0173b1c8d9faec20d9f91e04846
   
   #### Samples of `org.apache.shardingsphere`
   
![image](https://user-images.githubusercontent.com/20503072/143833010-02634a80-3eef-4b92-ba57-11d57923647d.png)
   
   #### Samples of `java.util.stream`
   
![image](https://user-images.githubusercontent.com/20503072/143833136-a8cc149d-bd60-4f99-b81f-f7b0e8d2623e.png)
   
   ### Replaced stream with for each
   
   #### Samples of `org.apache.shardingsphere`
   
   
![image](https://user-images.githubusercontent.com/20503072/143833174-e2993464-49c7-4d44-a5b5-0623b8fd8ad3.png)
   
   


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