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From "Sergey Dmitriev (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HARMONY-4039) [classlib][luni] Socket implementation is too slow
Date Fri, 08 Jun 2007 19:49:26 GMT

    [ https://issues.apache.org/jira/browse/HARMONY-4039?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12502909
] 

Sergey Dmitriev commented on HARMONY-4039:
------------------------------------------

I am just wondering about the difference of hysock_select_read() implememtation on Linux and
Windows.

On Windows we have a loop with hysock_select() inside and (quote):
    /* break out of the loop if we should not be looping (timeout is zero) or
      * if an error occured or data ready to be read */

On Linux we don't have such a loop - we have a single call of hysock_select().

Just an interesting fact.


> [classlib][luni] Socket implementation is too slow
> --------------------------------------------------
>
>                 Key: HARMONY-4039
>                 URL: https://issues.apache.org/jira/browse/HARMONY-4039
>             Project: Harmony
>          Issue Type: Bug
>          Components: Classlib
>            Reporter: Boris Kuznetsov
>            Assignee: Tim Ellison
>         Attachments: patch.txt, test.java
>
>
> I noticed that Harmony classlib works too slowly with MySQL (both on DRLVM and Jrockit).
> The reason is the socket implementation: availableStreamImpl uses 1 ms timeout for hysock_select_read().
> It leads to 0.015 sec wait on select call for every available().
> Here are the test which demonstrate the problem and proposed patch.
> harmony-jre-r533500\bin\java test
> estimatedTime 15625
> After patch applying:
> java test
> estimatedTime 10

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