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https://issues.apache.org/jira/browse/LUCENENET-647?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17052367#comment-17052367
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Elad Margalit commented on LUCENENET-647:
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maybe its because of compression by default.
https://stegard.net/2015/05/performance-of-stored-field-compression-in-lucene-4-1/
> Performance decreasement migrating from 3.0.3 to 4.8.0
> ------------------------------------------------------
>
> Key: LUCENENET-647
> URL: https://issues.apache.org/jira/browse/LUCENENET-647
> Project: Lucene.Net
> Issue Type: Improvement
> Environment: OS: Windows 10
> CPU: Intel Core i7-8700
> RAM: 32Gb
> Reporter: Mo Dje
> Priority: Major
>
> Hello,
> I'm currently migrating a project, that uses Lucene.Net, from .Net Framework
> to .Net Core.
> I had to migrate from 3.0.3 version of Lucene to 4.8.0 (beta0007) but I
> noticed performance decreasement while measuring response time while
> requesting the database. The response time using Lucene 4.8.0 is two to three
> times higher than 3.0.3 version.
> I read some forum topics where other users noticed this performance
> decreasement too. Are you aware about that? Do you plan to do something to
> improve performances of Lucene 4.8.0?
> Best regards
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