After upgrading to build 3047 from build 3033 I've noticed the speed of opening files has decreased significantly on Linux (Ubuntu). While opening the file Sublime Text becomes unresponsive for half a second.
I've tested on Mac and Windows and files open near instantaneously like before.
Sublime Text freezes while typing into the quick open menu (Ctrl+P), navigating the file list in said menu and opening files from the sidebar. There is no freeze when opening a file that is already open in another tab.