Thx for the replies. @ Ivo Smits Initially I did think of Nan or Infinity, but then wouldn't these give a runtime exception? I couldn't find any trace when stepping through a debugger, though I didn't check all 16000 entries in the array. I've since tried testing directly for Nan (float.IsNaN) but nothing was found.
@ Rodrigo Kumpera Denormals, that sounds much more likely, especially as the values I got from the debugger were towards 1e-44. That would explain the performance drop. Trouble is I've since tried checking for these and simply zero-ing them (e.g. if(Math.Abs( x[i] ) < 1e-38 ) x[i] = 0;), but that appeared to have no effect? Indeed I found it was zero-ing values when the performance was running fine, so clearly the fluid sim is generating some very small values normally. However its the best explanation i've heard, it makes a lot of sense in the context of the code. -- View this message in context: http://mono.1490590.n4.nabble.com/Weird-performance-problems-possibly-due-to-floats-and-precision-issues-tp3829087p3829700.html Sent from the Mono - Dev mailing list archive at Nabble.com. _______________________________________________ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
