On Thu, Feb 9, 2012 at 9:22 AM, dsimcha <dsim...@yahoo.com> wrote: > I wonder how much it helps to just optimize the GC a little. How much > does the performance gap close when you use DMD 2.058 beta instead of > 2.057? This upcoming release has several new garbage collector > optimizations. If the GC is the bottleneck, then it's not surprising that > anything that relies heavily on it is slow because D's GC is still fairly > naive. > > > On Thursday, 9 February 2012 at 15:44:59 UTC, Sean Kelly wrote: > >> So a queue per message type? How would ordering be preserved? Also, how >> would this work for interprocess messaging? An array-based queue is an >> option however (though it would mean memmoves on receive), as are >> free-lists for nodes, etc. I guess the easiest thing there would be a >> lock-free shared slist for the node free-list, though I couldn't weigh the >> chance of cache misses from using old memory blocks vs. just expecting the >> allocator to be fast. >> >> On Feb 9, 2012, at 6:10 AM, Gor Gyolchanyan <gor.f.gyolchan...@gmail.com> >> wrote: >> >> Generally, D's message passing is implemented in quite easy-to-use >>> way, but far from being fast. >>> I dislike the Variant structure, because it adds a huge overhead. I'd >>> rather have a templated message passing system with type-safe message >>> queue, so no Variant is necessary. >>> In specific cases Messages can be polymorphic objects. This will be >>> way faster, then Variant. >>> >>> On Thu, Feb 9, 2012 at 3:12 PM, Alex Dovhal <alex dov...@yahoo.com> >>> wrote: >>> >>>> Sorry, my mistake. It's strange to have different 'n', but you measure >>>> speed >>>> as 1000*n/time, so it's doesn't matter if n is 10 times bigger. >>>> >>>> >>>> >>> >>> >>> -- >>> Bye, >>> Gor Gyolchanyan. >>> >> > > dmd 2.057: received 100000000 messages in 192034 msec sum=4999999950000000 speed=520741 msg/sec received 100000000 messages in 84118 msec sum=4999999950000000 speed=1188806 msg/sec received 100000000 messages in 88274 msec sum=4999999950000000 speed=1132836 msg/sec
dmd 2.058 beta: received 100000000 messages in 93539 msec sum=4999999950000000 speed=1069072 msg/sec received 100000000 messages in 96422 msec sum=4999999950000000 speed=1037107 msg/sec received 100000000 messages in 203961 msec sum=4999999950000000 speed=490289 msg/sec Both versions would inexplicably run at approximately half the speed sometimes. I have no idea what is up with that. I have no java development environment to test for comparison. This machine has 4 cores and is running Windows. Regards, Brad Anderson
