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https://issues.apache.org/jira/browse/UIMA-6136?focusedWorklogId=332866&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-332866
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ASF GitHub Bot logged work on UIMA-6136:
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Author: ASF GitHub Bot
Created on: 23/Oct/19 20:41
Start Date: 23/Oct/19 20:41
Worklog Time Spent: 10m
Work Description: mischor commented on pull request #13: [UIMA-6136] fix
hashcode and equals for FsIndexComparatorImpl
URL: https://github.com/apache/uima-uimaj/pull/13
please see if this fixes the performance issue
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Issue Time Tracking
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Worklog Id: (was: 332866)
Remaining Estimate: 0h
Time Spent: 10m
> FSIndexComparatorImpl.equalsWithoutType() gets slow for many CASes with the
> same TS
> -----------------------------------------------------------------------------------
>
> Key: UIMA-6136
> URL: https://issues.apache.org/jira/browse/UIMA-6136
> Project: UIMA
> Issue Type: Bug
> Components: UIMA
> Affects Versions: 3.1.0SDK
> Reporter: Richard Eckart de Castilho
> Priority: Minor
> Attachments: 2019-10-21_22-23-37.png, 2019-10-21_22-44-25.png,
> Uima6136Test.java
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> When creating several hundred CASes with the same type system, the
> `shareExisting` mechanism which is designed to save on memory starts eating
> into CPU time quite a lot.
> This screenshot shows that in my particular case, the method is called ~11mio
> times and takes the bulk of the processing time. The call hierarchy is a bit
> messed up though - actually this happens when the CASes are initialized.
> !2019-10-21_22-44-25.png|width=100%!
> The second screenshot shows the actual call hierarchy, but for some reason,
> the profile doesn't properly dive into the `equals` method here and doesn't
> count the time spent in `equalsWithoutType`.
> !2019-10-21_22-23-37.png|width=100%!!
> So either the method shouldn't be called that often - or - it should be way
> faster.
> In the example, I have like 1800 CAS instances and their type system has
> upwards of 200 types.
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