[jira] [Resolved] (NETBEANS-3666) Excessive amount of CPU used in multitab UI

["Tomáš Procházka (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/NETBEANS-3666?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tomáš Procházka resolved NETBEANS-3666.
---------------------------------------
    Fix Version/s: 11.3
         Assignee: Karl Tauber
       Resolution: Fixed

PR was merged.

> Excessive amount of CPU used in multitab UI
> -------------------------------------------
>
>                 Key: NETBEANS-3666
>                 URL: https://issues.apache.org/jira/browse/NETBEANS-3666
>             Project: NetBeans
>          Issue Type: Bug
>          Components: ide - UI
>            Reporter: Laszlo Kishalmi
>            Assignee: Karl Tauber
>            Priority: Major
>              Labels: performance, pull-request-available
>             Fix For: 11.3
>
>          Time Spent: 1h
>  Remaining Estimate: 0h
>
> It seems there is a performance bottleneck in multitabs implementation.
> org.netbeans.core.multitabs.impl.TabDataRenderer.getPreferredWidth(Object) is being called several times spending considerable amount of time setting the text on a JLabel over and over:
>  
> [https://github.com/apache/netbeans/blob/06b3e677d9ea4dbd9987c8245fe5be776e8245f8/platform/core.multitabs/src/org/netbeans/core/multitabs/impl/TabDataRenderer.java#L144]
> The purpose of these calls is to properly measure the width of the rendered component.



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