Hi there!
$ ps aux | grep Sublime
adrien 3259 97.1 8.9 3162944 372280 ?? R 12:02PM 5:15.92 /Applications/Sublime Text 2.app/Contents/MacOS/Sublime Text 2 -psn_0_1233197
I don’t know what is happening today but I got a real issue with ST2 
Is there a way to find what is slowing down ST2 ?
Plugins can cause this, you can reset to a vanilla state via www.sublimetext.com/docs/2/revert.html
Alternatively, adding large (100k+ files) folder trees to a window will trigger performance issues - these will be resolved in the next build
About the huge files, it’s not that since I already opened this same project several times without any kind of problems. And I sure know there is huuuge files in this project.
I revert to a Vanilla ST2 but still get this issue… Even with a 3-files project.
Can you let me know if this still occurs with the latest dev build? (sublimetext.com/dev)