Just tried this out on some of our code bases. It appears to fail to generate snippets/highlights for all files that contain non-Unicode text, e.g. "Müller" in ISO-8859-1. Known issue?
Many queries times out for me although I'm running it on a pretty beefy AWS c5 instance with SSDs. Queries such as "type:diff" doesn't seem to work at all on my code bases. It also does not appear to cache any data from previous runs of "git log", so attempting to do the suggested reload doesn't really workaroudn the issue. Are you working on improving the performance?