https://bugs.kde.org/show_bug.cgi?id=364184
Bug ID: 364184 Summary: Navigating Canvas is slow (Pan, Rotate, Zoom) Product: krita Version: 3.0 Platform: MS Windows OS: MS Windows Status: UNCONFIRMED Severity: normal Priority: NOR Component: usability Assignee: krita-bugs-n...@kde.org Reporter: os...@jadamspam.pl I noticed that in v3.0 I have really worse performance in navigating the Canvas (Pan, Rotate, Zoom) compared to v2.9.10ae. On both versions I used 'Instant Preview' and 'OpenGL' and 'Scaling Mode >> High Quality Filtering". In v3.0 helps a lot (for me) turning off 'Display >> Use texture buffer' but still I get really worse performance than I have in v2.9.10ae. My PC: Intel Dual Core 2,2 Ghz, 4 GB Ram, Nvidia GeFroce G 103M, Win 7 64bit. >From IRC (discussion about these issue): <boud> it might be a change in Qt5 -- where Qt now forces double-buffering <boud> it's so incredibly hard... <boud> we started porting over a year ago, but only now we're really seeing the regressions, other than the most obvious ones! <eliotJ> Even on small resolution of image I have slow down... <boud> what I think is also going is that 3.0 has memory problems compared to 2.9 Reproducible: Always -- You are receiving this mail because: You are watching all bug changes.