On 08/17/2011 06:49 PM, David W Noon wrote:
Perhaps the slower execution speed of CIL (.NET, Mono) byte code masks the context switching overheads and makes this practice look less inefficient.
I doubt that this is the case. AFAIK, CIL code is not necessarily much slower than native code. (Of course it can be much slower, especially when garbage collection is necessary.)
But when using a parallel loop "decently" i.e. for doing not too short unrelated calculations with only so many parallel threads as processors are available, this is supposed to grant a good speedup. AFAIK with prism the parallel loop automatically is broken into as many parallel threads as available processors, thus avoiding additional context switches.
-Michael _______________________________________________ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
