View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0009568 | ardour | bugs | public | 2023-12-07 17:59 | 2023-12-13 17:46 |
| Reporter | automaciej | Assigned To | |||
| Priority | normal | Severity | minor | Reproducibility | always |
| Status | new | Resolution | open | ||
| Platform | Debian GNU | OS | Linux | OS Version | (any) |
| Product Version | 8.1 | ||||
| Summary | 0009568: Slow operations on markers | ||||
| Description | Initially discussed in https://discourse.ardour.org/t/slow-operations-on-markers/109587 A session with 0000010:0000030 regions and 0000102:0000120 markers is slow to make operations on markers. Slow operations: Session load Opening the side panel with the list of markers (shift+L) Adding / removing markers | ||||
| Steps To Reproduce | Import/open the attached session. Open the side panel (shift+L). Try adding a marker and/or removing a marker. Expected: Operation is near instantaneous. Observed: There's a spike in CPU usage / one saturated core, for a good few seconds. The desktop opes a dialog saying that Ardour is not responding and asking if I want to force-quit or wait. | ||||
| Additional Information | Ardour generally works, and it's enough to wait for the marker to be created or removed. I couldn't reproduce the issue by creating a new session and tapping Tab 120 times. The issue remained after I removed all the tracks and all the audio sources from the session. I couldn't pinpoint what exactly about the markers and/or regions makes them slow, because the slowness built up gradually over time. But the slowness is persistent, and I verified that does persist in the session archive I'm uploading. | ||||
| Tags | performance | ||||
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Thanks for the session. That helped to track down the issue. The Slowdown problem is now fixed since Ardour 8.1.156. It was caused by a significant amount of Section and Location Markers. There is still an issue with your session when undoing a marker change. That apparently results in an endless loop. |
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I downloaded Ardour-8.1.164 and I can confirm that adding and removing markers are now fast. Thank you! I'll avoid undoing marker changes for now. |
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I worked some more using Ardour 8.1.164. - Loading the session is much faster - Adding and removing markers is fast just like in an new/empty session - Opening the markers pane (shift+L) is still slow - Undoing a marker change is indeed still slow and/or maybe doesn't even work at all, I'm not sure. I realized that I can't avoid undoing marker changes - if I work with markers, and I need to undo a sequence of steps, there's no way other than trying to undo a marker change. Today I tried to undo a chance, I eventually gave up on the undo and instead used an earlier saved session and redid a small amount of work. |
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It helps significantly if you never show the Location list or the sidebar. Then undo/redo works just fine. Once the location UI and/or the sidebar version is shown, here, it can take up to 15 sec here with your session to re-populate that pane. |
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The location UI is important to my workflow, I use it to navigate around the session. But fortunately I don't use the undo option too often, and I try to separate the times when I work with markers (which don't need undo generally) and when I work with regions (where I need to undo quite often). I'm wonder what is it about my session that is a challenge for Ardour? It's not like it's millions of markers or millions of regions. Is it about some sort of relationship between the two? |
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It's just that GTK performance sucks if there are more than 64 elements in a box - It's entirely a GUI issue. undo/redo restores the whole state and if locations were added/removed the LocationUI is repopuplated, which can take ages. Perhaps use the mini-timeline at the top to navigate? I've checked with a few thousand locations and everything's fine as long as I never show the Location List, and I don't see a way to fix the UI performance of that right now. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2023-12-07 17:59 | automaciej | New Issue | |
| 2023-12-07 17:59 | automaciej | Tag Attached: performance | |
| 2023-12-07 17:59 | automaciej | File Added: Slow markers repro.ardour-session-archive | |
| 2023-12-08 16:17 | x42 | Assigned To | => x42 |
| 2023-12-08 16:17 | x42 | Status | new => assigned |
| 2023-12-08 16:44 | x42 | Note Added: 0028400 | |
| 2023-12-09 15:47 | automaciej | Note Added: 0028402 | |
| 2023-12-09 21:57 | automaciej | Note Added: 0028403 | |
| 2023-12-10 03:48 | x42 | Note Added: 0028404 | |
| 2023-12-13 13:40 | automaciej | Note Added: 0028415 | |
| 2023-12-13 17:46 | x42 | Note Added: 0028416 | |
| 2023-12-13 17:46 | x42 | Assigned To | x42 => |
| 2023-12-13 17:46 | x42 | Status | assigned => new |
