MIDI editor: Deleting events is terribly slow and may even freeze REAPER (FIXED)

[juliansader]

The standard action for deleting events in the MIDI editor, "Edit: Delete events", is terribly slow:

* Deleting all CCs in a large MIDI take with hundreds of thousands of events may take a whole minute.

* Trying to delete millions of events across several editable takes will cause REAPER to hang (seemingly) forever.

(v5.70 and all previous versions)

[_Stevie_]

Yep, confirmed, very unpleasant.

[TonE]

It could be useful if Reaper could just assign a 'delete flag', then only continue deleting when Reaper shows no activity or less activity, thus not interrupting current workflow. It would delete in 1 minute, or 2 minutes, but in the end those events will get deleted and that 'delete flag' again removed. Just an idea. Especially for such cc deletion/thinning cases.

[FnA]

This seems far worse than that even:
SWS/BR: Delete all events in last clicked lane

The Eraser mouse mod works faster than the Reaper Delete action starting at the end of the item. A lot slower from the front, than the back. Tried with 50000. Cut doesn't work good either. I'll say at least 5 seconds for Edit: Delete. Breeder's action hangs at least 5 minutes before I shut it down.

[ivansc]

What happens if you do a rmb lasso and then press Del?
Still really low?
I am not seeing this even on pretty large dense MIDI data

[Tod]

Yes, I can confirm this, on more than one occasion I've had to shut Reaper down using the Task Manager.

Also large amounts of CC events is the only thing I've seen that truly slows things down in Reaper. I use the delete or remove duplicates, quite often.

Copying/Pasting CCs is also painfully slow.

[Justin]

Fixing. Any other CC/note deleting related actions that are slow?

[juliansader]

"Delete notes" is much faster (presumably because the number of notes is usually much lower than the number of CCs, if an item has lots of CC expression).

"Delete all notes of the less than X" can get a bit slow if the number of small notes is unusually high, but since it only affects the active take, it doesn't completely freeze REAPER. However, if this action is ever expanded to all editable takes, the slowness may cause trouble.

[Justin]

Originally Posted by juliansader

"Delete notes" is much faster (presumably because the number of notes is usually much lower than the number of CCs, if an item has lots of CC expression).

"Delete all notes of the less than X" can get a bit slow if the number of small notes is unusually high, but since it only affects the active take, it doesn't completely freeze REAPER. However, if this action is ever expanded to all editable takes, the slowness may cause trouble.

Cool we can make this one faster too, thanks.