In release 181, Construct 2 has become unusable for my large project - I'm on a very powerful machine, but doing any actions in the layout view OR the event sheet view causes constant 0.5-1 second freezes. My laptop fan flares up like crazy during these freezes.
I've tested both r180 and r181 with the same project, on the same machine, one right after the other, with no other apps running. The difference is huge.
I've uploaded a video to show you what the freezes look like.
Here's the video.
Operating System and Service Pack
Win 8.1 64bit
Construct 2 Version ID