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> and removes the population of an object via a constructor which is slower 
> than populating an object via setters.

For clarification, is this optimization the much smaller of the 2?  Naively - 
I'd hope construction would beat setters, but - if not - be _very close_.  If 
this latter bit was significant, my faith in the jvm is duly shaken.

- John Sirois


On Feb. 10, 2016, 5:15 p.m., Zameer Manji wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/43457/
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> 
> (Updated Feb. 10, 2016, 5:15 p.m.)
> 
> 
> Review request for Aurora, Maxim Khutornenko and Bill Farner.
> 
> 
> Repository: aurora
> 
> 
> Description
> -------
> 
> Profiling master indicated that the bottleneck was MyBatis populating 
> ResultSets and populating the resulting objects. This patch removes 
> subselects, which reduces the number of ResultSets and removes the population 
> of an object via a constructor which is slower than populating an object via 
> setters.
> 
> 
> Diffs
> -----
> 
>   
> src/main/java/org/apache/aurora/scheduler/storage/db/views/DbAssginedPort.java
>  PRE-CREATION 
>   
> src/main/java/org/apache/aurora/scheduler/storage/db/views/DbAssignedTask.java
>  93722395ed9fcd22dcb12e34e648e6e410952d43 
>   
> src/main/java/org/apache/aurora/scheduler/storage/db/views/DbScheduledTask.java
>  502a1fa6fc141df498f0f09af292ce24e269731d 
>   
> src/main/resources/org/apache/aurora/scheduler/storage/db/TaskConfigMapper.xml
>  b1394cf44b7ddafcbc47bb1968306d0b33293380 
>   src/main/resources/org/apache/aurora/scheduler/storage/db/TaskMapper.xml 
> ea469cce31544221c34ae05a1c65f71271985655 
> 
> Diff: https://reviews.apache.org/r/43457/diff/
> 
> 
> Testing
> -------
> 
> Master:
> Benchmark                                      (numTasks)   Mode  Cnt   Score 
>    Error  Units
> TaskStoreBenchmarks.DBFetchTasksBenchmark.run       10000  thrpt    5  44.052 
> ± 14.689  ops/s
> TaskStoreBenchmarks.DBFetchTasksBenchmark.run       50000  thrpt    5   0.179 
> ±  0.052  ops/s
> TaskStoreBenchmarks.DBFetchTasksBenchmark.run      100000  thrpt    5   0.087 
> ±  0.022  ops/s
> 
> This Patch:
> Benchmark                                      (numTasks)   Mode  Cnt   Score 
>   Error  Units
> TaskStoreBenchmarks.DBFetchTasksBenchmark.run       10000  thrpt    5  51.531 
> ± 7.236  ops/s
> TaskStoreBenchmarks.DBFetchTasksBenchmark.run       50000  thrpt    5   7.370 
> ± 1.320  ops/s
> TaskStoreBenchmarks.DBFetchTasksBenchmark.run      100000  thrpt    5   2.143 
> ± 1.234  ops/s
> 
> 
> Thanks,
> 
> Zameer Manji
> 
>

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