More about this laptop: 16GB RAM, 1TB SSD, case sensitive file system
Using activity monitor, I can see that I am not using any swap space.
I noticed recently that over time, deleting even small directories takes a longer time.
In order to try to be a little scientific about it, I started testing a single folder with 38 files that add up to 1.4MB. I have a process that can regenerate this folder after I delete it.
I am deleting from the terminal using:
time rm -rf <folder>
When I first reboot, deleting this folder takes just over 1 second.
Once I load up my regular suite of apps (browser, calendar, etc.), it starts to take longer.
I can see that after a while it takes 3 seconds to delete the same folder.
Eventually, it seems to cap at nearly 7 seconds.
Throughout my testing, I am somewhere between 10GB and 12GB in use of the available 16GB. At no time is swap space used.
Finally, once I get into this state of deletes taking a longer time, the only remedy seems to be to reboot. Even if I kill every running app (with the exception of the terminal), it still takes a longer time to delete the folder.
A few things I've tried based on other searches is to disable local Time Machine backups and turn off Time Machine altogether. I also ran Disk Utility and did
Verify Disk and there were no errors. Likewise, I did the
Verify Disk Permissions and there were no issues.