Since 6.54, project that contain too many items runs really slow

[dsyrock]

https://drive.google.com/file/d/1ges...TMMuwczJtbG3hl

I uploaded a project that contain 37352 empty items. Try opening it, then drag an item quickly. If you are using any version that later then 6.54(including the latest dev), you will see the item is moving much slower than your mouse. There tow ways to fix, delete those empty items, or hide the tracks that contain too many items.

Actually any items(audio, midi, etc) can make a project slow, only if they are more enough.

If you do this in 6.53, it is as smoothe as usual.

[Justin]

ah yes, an old optimization for many overlapping 1px-wide items was removed, re-adding!

[dsyrock]

Originally Posted by Justin

ah yes, an old optimization for many overlapping 1px-wide items was removed, re-adding!

Thank you Justin. But I tested again in the latest dev, still very laggy when draging an item, comparing to doing it in an empty project.


Maybe I'm misunderstanding, but I just placed an empty item(about 4s length), duplicated it again and again, so they are not overlapping and not short items.

[Justin]

Originally Posted by dsyrock

Thank you Justin. But I tested again in the latest dev, still very laggy when draging an item, comparing to doing it in an empty project.

Using +dev0430 and your project above it is very fast here on both Windows and macOS. Perhaps post your reaper.ini, there could be a setting that affects this?

Maybe I'm misunderstanding, but I just placed an empty item(about 4s length), duplicated it again and again, so they are not overlapping and not short items.

in screen-space, they are very short (1 pixel) and overlapping

[dsyrock]

Originally Posted by Justin

Using +dev0430 and your project above it is very fast here on both Windows and macOS. Perhaps post your reaper.ini, there could be a setting that affects this?



in screen-space, they are very short (1 pixel) and overlapping

Thanks. I uploaded my reaper.ini, please let me know if there is any option affecting this.

[Hey Lee]

+1 same problem

[schwa]

What color theme are you using? If it's not the 6.0 default, does the behavior change if you switch to the 6.0 default theme, using +dev0430 or later?

[dsyrock]

Originally Posted by schwa

What color theme are you using? If it's not the 6.0 default, does the behavior change if you switch to the 6.0 default theme, using +dev0430 or later?

I have tested in the default theme, but it was still laggy.