Hi, There seems to be a performance regression concerning "Show selected features" in the attribute table of recent QGIS versions. (See also https://twitter.com/DrChrisGeoSci/status/1288120808951312389)
I've tested this with the Natural Earth dataset ne_10m_populated_places layer. The expression "NAME" like 'A%' is close to instantaneous but switching to "Show selected features" takes forever and freezes QGIS master and 3.14 in a way that looks like it crashed (i.e. "not responding" on Windows). In 3.4 "Show selected features" is much faster. There's no freeze. Is this a known issue or should I open a ticket? Regards, Anita
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