I am using uVision V5.18.0.0 running under Windows 10, building code for various STM32F parts.
My problem is that the IDE stops responding at various places for a long time, sometimes over 5 minutes, occasionally over 10, but eventually recovers.
This happens mostly at the completion of a build, occasionally on entering a debug session and occasionally when leaving a debug session.
While it isn't responding, a quick look at the Windows task manager shows the IDE is still consuming processor time, around 20%, and using a lot of memory, anything up to 2 GB!
It is becoming an issue that I have to wait for so long after running a build, and I would really appreciate a fix to this problem.
Then you'll have to live with whatever quirks that are present. You could use a faster or multi-core system, more memory or an SSD.
V5.28 does seem to have a short dwell after build completion, but that's only a few seconds on a QC Xeon as the IDE collects itself. Perhaps as the entire memory space has been tainted by the build and translation/generation on transient data held in cache or write-back queue.