Performance decreasement migrating from 3.0.3 to 4.8.0

[apache]

Performance decreasement migrating from 3.0.3 to 4.8.0

[clambertus]

I faced the same performance degradation.
Shad Storhaug , I saw some commits on this issue, any chance to release newer beta?

by eladmarg

[clambertus]

maybe its because of compression by default.
https://stegard.net/2015/05/performance-of-stored-field-compression-in-lucene-4-1/

by eladmarg

[clambertus]

Yes I read this article. There is a little improvement by doing the hack presented in this article but there is still a serious gap with the previous version in terms of response time.

by mo dje

[clambertus]

Thanks for the report.

However, without more information there isn't much we can do on our end. Specifically, what is slow? Searching, indexing, analyzing?

Without seeing some code, it is hard to put together any advice on what to do about it. Could you please provide a sample configuration that runs fast in Lucene.NET 3.0.3 and is measurably slower when running with Lucene.NET 4.8.0?

Also, can you please confirm you are using 4.8.0-beta00007? It has several performance improvements over the previous betas.

Elad Margalit - Yes, there are some additional performance improvements in the trunk that haven't been released yet. Most of them only apply to very specific configurations, though. I am hoping to eliminate the "Support" namespace on ICU4N before doing that release.

by nightowl888

[clambertus]

Shad Storhaug, the slowness issue is for searching operation.

Here is an example of a piece of code used to do a search :

var queryBuilder = new QueryBuilder(new MyAnalyzer());

var scoreDocs = indexSearcher.Search(queryBuilder.CreateBooleanQuery(field, value), 1).ScoreDocs;

I confirm that I am using 4.8.0 beta00007.

by mo dje

[NightOwl888]

Closing this because there is nothing here that can be reproduced and we have approximately doubled performance since this was reported.