Screens with large numbers of PyDM widgets take a long time to close.
Expected behavior
Closing a PyDM screen should be somewhat fast, or at least much faster than it is now (~30s - 1 minute for my application). The operating system should be able to clean up most of the resources without too much special handling in Python.
Steps to Reproduce
Create an application with many, many, many PyDM widgets that connect to different PVs
Run the application and close it
I ran a profiler on the closure of pmps-ui, a particularly large applications. I'm attaching the output here, which unfortunately github does not display interactively as it does on my local computer. The full version and some related discussions can be found in the slac slack at https://slac.slack.com/archives/C03KJMEUY5S/p1699988522361479
Note the scale here: 100 samples per second = ~60 seconds to close.
Describe the bug
Screens with large numbers of PyDM widgets take a long time to close.
Expected behavior
Closing a PyDM screen should be somewhat fast, or at least much faster than it is now (~30s - 1 minute for my application). The operating system should be able to clean up most of the resources without too much special handling in Python.
Steps to Reproduce
I ran a profiler on the closure of pmps-ui, a particularly large applications. I'm attaching the output here, which unfortunately github does not display interactively as it does on my local computer. The full version and some related discussions can be found in the slac slack at https://slac.slack.com/archives/C03KJMEUY5S/p1699988522361479
Note the scale here: 100 samples per second = ~60 seconds to close.
My Platform
rhel7 python 3.9