Re: ENB: pyzo syntax coloring: progress and a big mystery

['Terry Brown' via leo-editor]

2. Are the proper QDocument and QTextEdit being used? The present prototyping 
code uses an instance of pyzo's CodeEditorBase as way of instantiating the 
pyzo's syntax colorer.  Maybe the highlighter must be attached to Leo's actual 
QTextEdit body widget. The pyzo colorizer uses QDocument to do crucial caching. 
Two different QTextEdit's or QDocument's might create the performance bug.

Can you check that the cache is being hit, by reporting / counting hits?  If 
it's never being used, or being asked to cache the same values repeatedly, then 
some communication issue must be effectively disabling the cache.  I don't know 
how much pyzo relies on it for speed, but a broken cache could certainly slow 
things down. 
Cheers -Terry

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