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Re: [Texmacs-dev] qt TeXmacs is deadly slow

From: Gubinelli Massimiliano
Subject: Re: [Texmacs-dev] qt TeXmacs is deadly slow
Date: Thu, 31 Mar 2011 12:04:03 +0200

due to limitations of the Qt API we are not able to reproduce exactly the TeXmacs-X11 fluid experience when typesetting require long computations (essentially I cannot probe for user-related events interrupting long computations). This is the case with very long documents while editing at the beginning. I'm studying possible workarounds.

Thanks for the report.

On 31 mars 11, at 09:49, Sam Liddicott wrote:

With --enable-qt I'm finding teXmacs will go to 100% CPU for a second or more when I do mild things like insert a blank line near the beginning of a medium document. (Even with Document, Page, Type, Automatic).

The delay is the pagination changes, and is very short at the end of the document.

As an example, try importing this into TeXmacs: http://en.wikipedia.org/wiki/Gun_laws_in_the_United_States_%28by_state%29 it is about 600K long in the html

Pressing ENTER near the top of the page uses 100% CPU for about a second, inserts the line and then paints a corrupt screen.

I compiled non-qt and everything is great! (except the stinking file dialogs).

Does qt support non-event-loop based painting? (If that's the problem)?


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