Hi, i've had multiple ppl coming to me privately about this - Yes, performance with firefox has been steadily degrading in the past releases, since around 39 or so - i'm aware of this, but nobody is actually working on it - i won't/can't since this is way out my skills and i have no time nor motivation for that.
Debugging this requires profiling / running the browser within ktrace and figuring out why apparently it does way much more syscalls than before, which might be a clue, or not. Of course since you cant really use traditional tools like gdb, your toolbox is empty. Or that could be graphical stack regressions. Or so many other things. The builtin profiler needs specific code to work on OpenBSD. Anybody is welcome to look into it - or 5.9 will ship with firefox 43 as is. Landry
