I'd like to add my voice to the list of issues that have been raised by others (search for freeze)
CLion is just a pain on bigger code bases - it will intermittently hang, sometime without apparent cause (ie no mouse click, no keyboard shortcut other than typing etc).
I've logged an issue on YouTrack and I am only one of many. I received no updates. I don't have high hopes if I log more issues...
Perhaps it is impossible to have a JavaVM performant enough to handle the intricacies of parsing and maintaining an internal model of a large C/C++ project,but I think that the issues are not related to this since the cases when I can see the hanging, there's plenty of memory left (I've allocated 8G and only 4G are used according to the indicator) and the CPUs are not all maxed out (I'm on a shared dev box so it's rather beefy) but who knows?
What bothers me is that there is no public official acknowledgement of this - this is very different from my experience with Intellij IDEA, which I've been using since 2002 (this is not a typo). Although there are instructions on how to collect CPU/memory dumps, I see no follow up on the issues themselves.
Jetbrains used to be proud of using the phrase 'eat your own dog food' and the result was a set of tools second to none in my opinion, but
not in this case.
For tools that are supposed to aid our productivity, these freezes are a serious setback.
Just my 2c.