ITerm is great. It really is. But I wish more time was spent on optimizations. People these days seem to forget that terminals are often used for displaying huge amounts of rapidly scrolling text and that speed is of paramount importance. To put this in perspective, my computer has two CPUs with 4 cores each, 24GB RAM, a graphics card with 1600 Stream Processing Units (engine running at 850MHz) and 1GB of RAM, and ye…
While text performance is important, when I have to scroll through huge amounts of text it's usually because I made a mistake. If the output of my "fgrep -ri" is too long, it's also useless and I'd better pipe it to another grep or use a better regex.
urxvt's nice and responsive even while catting a million line file into one of the splits - I can use other terms and resize splits without a problem, hitting ^C stops cat instantly, and it's done displaying the lot inside 12 seconds.
Terminator takes 5 seconds just to respond to a ^C, and is otherwise completely unusable for over a minute.