[eluser]Pascal Kriete[/eluser]
Disk touching calls will always be slow. You're quite correct in your observation that there is no buffer. In fact, it does quite a bit that might be considered unnecessary, like check if the file exists every time. :: Check for file, get system time, open file, lock, append, unlock, close, chmod.
Not the most elegant solution, I'll give you that.
Logging is meant for development/debugging so you could argue that it doesn't really need to be fast. And the obvious counter to something like a log-buffer is that log messages can be used to trace where an app is failing. Although I'll take an xdebug stacktrace over the CI log any day.
