I installed kdiff3 on my m1 mac using homebrew but it seems that it doesn't have an apple m1 optimized version and hence takes 2-3 secs to open. Does anyone know of a file comparison tool similar to kdiff3 that is fast on m1?
A app called FileMerge is included with Apple's Xcode developer tools. It's a GUI app with a command-line variant called
opendiff. FileMerge is optimized for M1 Macs. If you install Xcode, you'll find FileMerge at the path shown below and in the screenshot (it's a quick Spotlight search away as well):