Thanks for that! I enabled TRIM for my Samsung 840 EVO as soon as I installed the 10.10.4 update, but I disabled it for now, at least until Samsung addresses this issue. If they don't, I'll probably just buy a Crucial MX200, seeing as those don't seem to have the TRIM issue.
See this post by Temptin
https://forums.macrumors.com/thread...ved-performance.1891936/page-10#post-21469307