"David Ferguson" <[EMAIL PROTECTED]> wrote: > > Certainly in this test (large array, constant value) it > does appear to be slower (not significantly, but a little). > > >By value, dynamically reallocated | >By value, preallocated > | (with pause between test) > >----Test 0 | >----Test 0 > >Elapsed 640 ms | >Elapsed 661 ms > >----Test 1 | >----Test 1 > >Elapsed 590 ms | >Elapsed 651 ms > >----Test 2 | >----Test 2 > >Elapsed 691 ms | >Elapsed 651 ms > >----Test 3 | >----Test 3 > >Elapsed 621 ms | >Elapsed 651 ms > >----Test 4 | >----Test 4 > >Elapsed 601 ms | >Elapsed 651 ms > ---------------------- ------------------------------ > average 629 average 653
But the variance is pretty huge on your first column there. I think the different of 24ms is swamped by the uncertainty in the measurements. So with your data I came to the same conclusion as I did with my data: it's difficult to tell which, if either, is faster, without more extensive measurement and careful analysis. This is what you would expect - the difference in allocation count for preallocation will only amount to a fairly small number (these arrays grow themselves exponentially, so the number of allocations is small). So you'd expect it to be too small to measure easily. -- Ian Griffiths DevelopMentor You can read messages from the Advanced DOTNET archive, unsubscribe from Advanced DOTNET, or subscribe to other DevelopMentor lists at http://discuss.develop.com.
