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From "yuexiaojun (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HTTPCORE-350) improve httpcore perfomence and reduce memory usage
Date Mon, 23 Sep 2013 11:48:06 GMT

    [ https://issues.apache.org/jira/browse/HTTPCORE-350?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13774481#comment-13774481

yuexiaojun commented on HTTPCORE-350:

hi Oleg:
   thanks for your suggestion and I have prepared a httpclient patch for HttpClient 4.3 (trunk).
> improve httpcore  perfomence and reduce memory usage
> ----------------------------------------------------
>                 Key: HTTPCORE-350
>                 URL: https://issues.apache.org/jira/browse/HTTPCORE-350
>             Project: HttpComponents HttpCore
>          Issue Type: Improvement
>          Components: HttpCore
>    Affects Versions: 4.2.5, 4.3
>         Environment: all platform
>            Reporter: yuexiaojun
>              Labels: patch
>         Attachments: http-client.patch, image2013-9-15 12-55-55.png, image2013-9-15 12-57-20.png,
image2013-9-16 9-49-4.png, loadversion.patch
> when I new  DefaultHttpClient instance without defaultParams  and then getParams,It will
loadVersionInfo  by classloader from jar file everytime,this operation is slowly and unworthy;
So I add a hashmap to cache versioninfo at org.apache.http.util.VersionInfo#loadVersionInfo
and read the version only first time ;
> test case and result:
> case : create 100000 httpclient objects and recycle memory with Xmx512m Xms512m
> before: bring about 118 younggc and spent 84509ms
> after:  bring about 15 younggc and only spent 3352ms
> when physical memory is insufficient ,this issues may cause http response very slowly;

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