If there was one thing that disappointed me about ST2 it was that it wasn't very competent with massive log files and the like. ATM I use an ide for Java, ST2 for nearly everything else (other languages, random text) and less / vi / others for logs and other massive files.
Would love to be able to kill off another tool.
For fun I tried some other editors (this is on OS X):
BBEdit 10.5: instant
vim 7.3: instant
TextEdit 1.8: instant
Textmate 2.0.0a9351: hung the entire app for 15 seconds
ST2: 9 seconds
So yeah, ST3 still seems to fare pretty poorly in this regard.
If he worked out a robust way to have file open performance on par with the likes of vim then I'd upgrade in a heartbeat.
"How well large files are supported is mostly a function of the syntax definition being used. Sublime Text 3 does have performance improvements compared to Sublime Text 2 here, but not significantly so."
Big disappointment for a lot of us.
If I work with many small SQL/XML/whatever files, then I want it to look pretty; but if I open a 100+ mb datadump, then Sublime should be able to open it as plain text without waiting for half an hour.
There are valid text files floating around with sizes above 1gb - why shouldn't I be able to open it, run searches and browse the contents? The computing power can do it, you can map it to memory if needed, I can spare 10gb ram if working on that size of data; but it needs to work reasonably fast.
Turning syntax off helps; simply it's a real pain to switch it on/off manually every time, as I'm working both with small and large files of the same type. I'd like the software to do that automagically based on file size or loading time estimates.
Vim does perfectly fine for the odd occasion I need to do something like that (very large files often mean you're Doing It Wrong™)