On Sep 29, 2016, at 00:15 , Gerriet M. Denkmann <g...@mdenkmann.de> wrote: > > dispatch_apply( nbrOfThreads, queue, ^void(size_t idx) > > As my computer has just 8 CPUs, I thought that using nbrOfThreads > 8 would > be silly: adding overhead without gaining anything. > > Turns out this is quite wrong. One function (called threadHappyFunction) > works more than 10 times faster using nbrOfThreads = a few ten-thousand (as > compared to nbrOfThreads = 8). > > This is nice, but I would like to know why can this happen.
What makes you think “nbrOfThreads” represents a number of threads? > Why are the threads seemingly blocking each other? > What is going on here? > How can I investigate this? Isn’t this what Instruments is for? _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
