Re: [QGIS-Developer] QGIS 3.0 Sluggish on MacOS 10.13 with Retina Display

Hi Nyall, On Wed, Feb 21, 2018 at 6:51 PM, Nyall Dawson wrote: > > > I'm just saying that there's nothing QGIS specific there - so there's > no clues there wherever it's a generic Qt issue or a QGIS regression. > I'm using xcode's instruments, but I've never really

Re: [QGIS-Developer] QGIS 3.0 Sluggish on MacOS 10.13 with Retina Display

On 21 February 2018 at 07:31, Jeremy Palmer wrote: > Hi Nyall, > > On 21/02/2018 10:12, "Nyall Dawson" wrote: > > There's not much to go on in that stack - it's all Qt internals. > > > What would you like to see? I'm just saying that there's nothing

Re: [QGIS-Developer] QGIS 3.0 Sluggish on MacOS 10.13 with Retina Display

Hi Nyall, On 21/02/2018 10:12, "Nyall Dawson" wrote: There's not much to go on in that stack - it's all Qt internals. What would you like to see? Are you sure this isn't solely due to the fact that QGIS is painting so many more pixels? I'd like to see a test where

Re: [QGIS-Developer] QGIS 3.0 Sluggish on MacOS 10.13 with Retina Display

On 21 February 2018 at 06:34, Jeremy Palmer wrote: > Hi All, > > For some time I've been noticing that QGIS 3.0 on MacOSX has sluggish canvas > redraw speeds. When comparing between QGIS 2.18 and 3.0 I see ~4x more CPU > activity in 3.0 when performing the same set of

[QGIS-Developer] QGIS 3.0 Sluggish on MacOS 10.13 with Retina Display

Hi All, For some time I've been noticing that QGIS 3.0 on MacOSX has sluggish canvas redraw speeds. When comparing between QGIS 2.18 and 3.0 I see ~4x more CPU activity in 3.0 when performing the same set of operations on the same dataset. My test case was using a single raster VRT with