On 26 Feb 2016 9:45 am, "Walter Bright via Digitalmars-d" < digitalmars-d@puremagic.com> wrote: > > On 2/26/2016 12:20 AM, Iain Buclaw via Digitalmars-d wrote: >> >> I thought that mulithreaded I/O did not change anything, or slowed compilation >> down in some cases? >> >> Or I recall seeing a slight slowdown when I first tested it in gdc all those >> years ago. So left it disabled - probably for the best too. > > > > Running one test won't really give much useful information. I also wrote: > > "On a machine with local disk and running nothing else, no speedup. With a slow filesystem, like an external, network, or cloud (!) drive, yes. I would also expect it to speed up when the machine is running a lot of other stuff."
Ah ha. Yes I can sort of remember that comment. One interesting line of development (though would be difficult to implement) would be to do all three semantic passes asynchronously using fibers. If I understand correctly, sdc already does this with many cases that need ironing out.
