Win7-64, 3+GHz i7, 32GB RAM, java heap maxed out, ...
I find the R2013a editor very slow to respond to keypresses on files that edit ok in R2012b.
The symptom is that keypressed get several characters ahead of the screen update, especially on inserts.
The editor start fine, edits ok, then the effect appears after a little editing, a few insertions, &c.
Yes, largish files, 2000 lines, callbacks & such generated by GUIDE so one file is sort of natural, &c.
Anyone found this & know anything that affects it?