dsimcha, el 15 de julio a las 19:23 me escribiste: > == Quote from Bane (branimir.milosavlje...@gmail.com)'s article > > Anyway, I'm here bitching myself :) Just want to say that idea to have more > > than > one GC type to chose when compiling would be very interesting thing, if single > implementation can't be good for all cases. > > > If I had to chose one topic with most bitchin' on this newsgroup I have > impression it would be the one about GC. They usually goes from 'GC managed > programs are slow, D ain't good enough', to 'language X has better GC than > D', to > ' GC that D has is bad at Z'. > > > > > > Why not make D summer of code - write your own GC optimized for special > > > case > of XYZ, send it, bundle all up in D with compiler switch '--useGC=XYZ'. That > is > only way to really compare what is best for special case. > > > > > If/when we have enough manpower to write/maintain multiple GC's, here are > some GC > designs that can be either optimizations or pessimizations depending on use > case: > > 1. Precise heap scanning (i.e. in the absence of copying/heap compaction). > If > you allocate mostly small objects, you're probably very seldom bitten by false > pointers and the O(1) overhead per block needed to store type info may be > significant. If you allocate mostly large objects, you've probably been eaten > alive by false pointers and the O(1) per block overhead is negligible to you. > > 2. Concurrent collection. If you use threads for concurreny/latency reasons, > this can be a boon. If you use threads for parallelism/throughput reasons, or > write single-threaded code, this is a complete waste.
Not completely, if you have a multi-core, suddenly your program becomes multi-threaded and uses more than 1 core. In that case, a concurrent GC could improve the overall performance of the application. -- Leandro Lucarella (AKA luca) http://llucax.com.ar/ ---------------------------------------------------------------------- GPG Key: 5F5A8D05 (F8CD F9A7 BF00 5431 4145 104C 949E BFB6 5F5A 8D05) ---------------------------------------------------------------------- - Tata Dios lo creó a usté solamente pa despertar al pueblo y fecundar las gayinas. - Otro constrasentido divino... Quieren que yo salga de joda con las hembras y después quieren que madrugue. -- Inodoro Pereyra y un gallo
