I have one particularly large class, and it's very helpful to have the .M file open in two windows at the same time, with window1 working on function1 and window2 working on, say, function6 (or whatever).
In Xcode 7.2 and earlier, this was problematic. Backspacing in one window caused the other to scroll, losing your place. It was annoying.
In Xcode 7.3, this seems to be completely impossible. Once I open the second window, two things happen:
1. Window 1 becomes almost completely unresponsive. It takes seconds for keystrokes to appear, scrolling is painfully slow, and autocomplete takes several seconds to appear.
2. Window 2 becomes unusable. It constantly re-scrolls up/down by about half a line. You can see the line numbers move, you can see the scroll bar jitter. But, the screen doesn't repaint properly. Sometimes you get lots of 1/2 line artifacts, sometimes the cursor just plain is on a different line than what is actually displayed. CTRL-L fixes the screen momentarily, but the within a few seconds, the scroll jitter will happen again.
I've rebooted, restarted xcode and reopened the project multiple times. It always happens when I open a file in a second window.
Google shows various other complaints about 7.3, but I can't find anyone describing these exact symptoms. I've opened a bug, but was wondering: can anyone else reproduce this, or is just me?
