version 4.0.0 less responsive

[Linden6]

Version 4.0.0 is less responsive than earlier versions. Zooming in and out - and sometimes when panning - is more jerky. When zooming right in or out the picture stalls for a second or two before jumping to the correct zoom level. This is for a moderately sized jpeg image (about 15,000 pixels square) saved locally.

Accessing an image from my slow network leads to this version being even more unresponsive - stalling for longer and often crashing.

When run from the command line this error warning sometimes appears:
Gdk-WARNING **: 11:07:27.138: vkAcquireNextImageKHR(): A swapchain no longer matches the surface properties exactly, but can still be used to present to the surface successfully. (VK_SUBOPTIMAL_KHR) (1000001003)

Thanks

[jcupitt]

There's an improvement to libvips which should help this:

libvips/libvips#4604

Not merged yet, but it should be soon, I hope.

[jcupitt]

(that issue has a couple of videos to show the speedup)

[Linden6]

Great - once the improvement's been merged into libvips master I'll recompile vipdisp with it, and hopefully everything will be smooth once again. Thanks