X-Plane 11.50 release candidate 2 is out. We changed a very, very small amount of code from RC1. If you think your performance changed radically from RC1 to RC2, there’s a good chance it’s an unrelated factor, because we didn’t change code that would affect performance.
The big change in this build is a pair of fixes to two crashes, both of which were related to texture paging and could happen more with orthophotos. One of those crashes was in the betas and was a result of a timing bug; in RC1 I cleverly fixed the timing – causing the crash to happen way more often. This is now fixed, so if RC1 was way worse than the betas for you crash-wise, RC2 should fix it.
The other was a crash we’d see after long flights that has been plaguing mostly Mac users (but sometimes Windows users too) for a while – we finally chased it down.
We do have a handful of issues we are still looking at, and I expect we’ll do an 11.51 bug fix patch, as we have done a bug fix patch on all of our big updates; there’s always something we find after we ship.