[6.73] MIDI items delete slowly from arrange window when MIDI editor open (FIXED)

[inthevoid]

EDIT: Behaviour still the same in 6.75

Continuing a discussion from this General Discussion thread (https://forum.cockos.com/showthread.php?t=264725&page=3) with a more specific bug report. Several users on page 3 of that thread have replied with their ability to replicate this issue and their findings.

With the MIDI editor open, and with 'Active MIDI item follows selection changes in arrange view', 'Media item selection is linked to visibility', 'Selection is linked to editability' selected, and MIDI editor behaviour set to one MIDI editor per project and 'Open all selected MIDI items', multiple selected items delete slowly, one by one, from the arrange view.

To replicate the issue, using the example project I attached in this post (https://forum.cockos.com/showpost.ph...6&postcount=98), which contains no FX or MIDI notes, just tracks and MIDI items on them:

- Open the project up in a clean install of Reaper 6.73.

- Make sure 'Active MIDI item follows selection changes in arrange view', 'Media item selection is linked to visibility', 'Selection is linked to editability' are checked in Preferences > MIDI editor.

- Uncheck 'Close editor when the active item is deleted in the arrange view.'

- Hit Apply.

- Make sure 'Behavior for open MIDI items in built-in MIDI editor' > 'Open all selected MIDI items' is selected.

- Make sure the MIDI editor is set to 'One MIDI editor per project'.

- Scroll to the bottom of the arrange window, select the lowest purple MIDI item and open it up in the MIDI editor.

- Marquee select several MIDI items above it, up to the top of the orange items, for example.

- With the MIDI editor still open, hit Delete.

- The items delete slowly, one-by-one from top to bottom.

With the MIDI editor closed, the items delete instantaneously.

Edit:

Computer specs are as follows:
Windows 11 Pro (21H2)
Reaper 6.73 64-bit
RME Fireface UCX II
Intel i9-12900K 3.20GHz
64GB DDR5 RAM

Edit 2:

.gif examples of slow deletion (https://forum.cockos.com/showpost.ph...1&postcount=87)

[inthevoid]

For anyone coming across this thread, here's a custom action workaround for the slow deletion to replace 'Item: Remove items', though it seems to do funny things with the MIDI editor window placement on Windows (seems to work fine on Mac):

[requires SWS & me2beats 'Close all MIDI editors' from ReaPack:]

SWS: Save current track selection
me2beats: Close MIDI editor
Item: Remove items
Item: Unselect (clear selection of) all items
SWS/FNG: Insert MIDI item with note C4 of size 32nd
Item: Open in built-in MIDI editor (set default behavior in preferences)
SWS/S&M: Focus main window (only valid within custom actions)
Item: Remove items
SWS: Restore saved track selection

This now makes at least multiple MIDI item deletion instantaneous for me (while still keeping the MIDI editor open on my 2nd screen).

[inthevoid]

Anyone else had this issue and found anything that helps? Would love to find a better way to deal with this than the workaround above. Thanks in advance!

[dazod23]

I've noticed the same behaviour, can sometimes take almost a second when dealing with big orchestral templates. I haven't found a more elegant solution than your workaround, but surely there must be a way, somewhere somehow...

[HighVoltage]

This might be related:

https://forum.cockos.com/showthread.php?t=264690