[ https://issues.apache.org/jira/browse/LUCENENET-541?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14014896#comment-14014896 ] 

Itamar Syn-Hershko commented on LUCENENET-541:
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Looking at this again, we can't really remove the IOException catch blocks, I'll bring that back.

> Performance issue with IOException in FastCharStream.
> -----------------------------------------------------
>
>                 Key: LUCENENET-541
>                 URL: https://issues.apache.org/jira/browse/LUCENENET-541
>             Project: Lucene.Net
>          Issue Type: Improvement
>          Components: Lucene.Net Core
>    Affects Versions: Lucene.Net 3.0.3, Lucene.Net 3.6, Lucene.Net 4.0
>            Reporter: Christopher Haws
>            Assignee: Itamar Syn-Hershko
>            Priority: Minor
>              Labels: performance
>         Attachments: Lucene541Sample.zip
>
>   Original Estimate: 0h
>  Remaining Estimate: 0h
>
> The Refill() method of the FastCharStream class contains logic based on an IOException being thrown. This logic degrades the performance of every query by about 10x from my testing.



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