Performance of .NET's BitVector32 is disappointing and having to declare access to (interfaced) variables in interface classes seems to hit performance too.
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Didn't you talk about BitVector class about a year ago Alexei?
Surely you have moved on since then?Comment
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Originally posted by DundeegeorgeI shall carry them in my heart all day tomorrow.
Probably.Comment
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Originally posted by AtWPerformance of .NET's BitVector32 is disappointing and having to declare access to (interfaced) variables in interface classes seems to hit performance too.
MS are agressive and well marketed, but often not the best. As an example, COM is widely used, and has helped me earn a living. But IMO it can be fiendishly difficult to maintain, especially for those unskilled in the technology. And the debugging support is awful. It's as if MS are creating a demand for geeks with specialist MS knowledge.Comment
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Perhaps you can be more specific about what is wrong with the BitVector32 class and I'll see if we can fix it for you?Comment
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Nothing is wrong, its just not as fast as doing bitshifts yourself - it sure is annoying to create bitmasks manually but its a LOT faster - with luck compiler will also inline those shifts, something it definately won't do for normal BitVector32 operations that use indexer - function calls are not cheap on x86.
Now interface really annoyed me by requiring to use accessors for variables (that were declared in interface) - rather annoying since I can't see any good reason for that.Comment
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You mean this?
public int this[BitVector32.Section section]
{
get
{
return (int) ((this.data & (section.Mask << (section.Offset & 0x1f))) >> (section.Offset & 0x1f));
}
set
{
value = value << (section.Offset & 0x1f);
int num1 = (0xffff & section.Mask) << (section.Offset & 0x1f);
this.data = (uint) ((this.data & ~num1) | (value & num1));
}
}Comment
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Originally posted by FungusI once wrote two programs to manipulate maps and lists. The first used STL, the second MFC. Guess which was fastest? Yup. The STL program was twice as fast as the MS one.
Frankly I've always thought STL was needlessly over complicated, and that the MFC container classes are much easier to use.
It's as if MS are creating a demand for geeks with specialist MS knowledge.Will work inside IR35. Or for food.Comment
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