Trace mode slow? Test this patch.

[Ryan Schmidt]

On Jan 30, 2022, at 12:25, Clemens Lang wrote:
> 
> Hi developers,
> 
> I recently noticed that trace mode was significantly slower on modern
> macOS than it used to be, and found some time to investigate the root
> cause.
> 
> If you saw the same, please test the current master branch state with
>  https://github.com/macports/macports-base/commit/3b949ccfe7a309bce1cc7041cdf56871890b784d
> It should return your trace mode to previous speeds (about a 6-8x
> improvement compared to how slow it currently is).
> 
> I've also done some benchmarking and have a few more patches in my
> pipeline that should bring a bit more (but rather minor compared to
> this) improvements.
> 
> HTH,
> Clemens
> 
> P.S.: I have not reported this problem to Apple. If somebody wants to
> verify that it occurs with all uses of copyfile(3), it would be nice if
> they could let them now.

Thanks Clemens. It's much faster now!