https://bugs.kde.org/show_bug.cgi?id=457562

Dmitry Kazakov <[email protected]> changed:

           What    |Removed                     |Added
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                 CC|                            |[email protected]

--- Comment #6 from Dmitry Kazakov <[email protected]> ---
Just a few notes about the technical size of the feature:

1) We update thumbnail preview every 500ms, including during the stroke.
2) Exact bounds calculation might be slow (slower than thumbnail calculation),
so, in theory it can interfere with the stroke responsiveness
3) Exact bounds has a cache which is reset only at the end of the stroke.
Therefore no thumbnail updates will be issued by then.

So idea solution would be to refactor the thumbnail generation code not to
request thumbnail updates during the stroke, but do that only at the end of
every stroke. That way it would be safe to update thumbs with exact bounds
only.

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