Git gutter freeze for a few seconds on first load

[benwainwright]

When I use git-gutter, as soon as I scroll to a part of the file where there are any differences, I get an immediate 1-3 second freeze the very first time. This has made the package unusable to me so I'm using diff-hl for now even though I'd prefer not to. Anyone got any ideas how to debug this?

[gonewest818]

You can use the built-in profiler commands profiler-start, profiler-report, and profiler-stop.

So for instance, do M-x profiler-start. Then open a file. Scroll to a place where there are diffs. Assuming you get the 3 second pause, then type M-x profiler-report and you'll see a new buffer that shows where the time was spent. Type M-x profiler-stop to stop the profiler from measuring any further.