Re: [platform-swt-dev] Performance of event handling

[Leo Ufimtsev <Leonidas@xxxxxxxxxx>]

Hey ya,

I'm not aware of event-based performance tests being done in the last ~3 years or so. The eventTable code looks pretty old.

Sorting the event table upfront might indeed improve performance somewhat, but it might also increase code clutter.

I would be happy to review a patch if there is an accompanying snippet that shows improvement in performance across platforms.

Thank you

Leo

On Tue, Jul 18, 2017 at 3:36 AM, Thomas Singer <ts-swt@xxxxxxxxxxx> wrote:

Hello experts,

Are there already some researches regarding the performance of event handling in SWT for non-trivial applications? From time to time I need to debug our application through code of SWT event handling and depending on the control there are quite a large number of listeners and for each event it steps through all the listeners. Wouldn't it be more efficient if adding a listener would sort them by their event type, so the loop knows when it can abort earlier? Wouldn't it be better, to ensure to have just 1 (instead of multiple) listeners of the same type, so the array of all listeners could be binary searched?

--
Best regards,
Thomas Singer
=============
syntevo GmbH
http://www.syntevo.com
http://www.syntevo.com/blog
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Leo Ufimtsev

Software Engineer

Red Hat

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