Taking out the Slow Parts, Again

While looking up something else, I came across Brad Martinez’s article on extending the functionality of the TreeView control. One of his points about how to load the TreeView more quickly caught my eye:

Make sure the parent Node's Sorted property is set to False: If Sorted = True, the TreeView must sort every Node as it is added under the parent Node. Make Sorted = True after all child Nodes are added.

I wondered how much of an improvement it would make, so I changed some generic TreeView loading code I use in lots of places to follow his advice. Loading 1,329 nodes dropped from 4.128 to 0.533 seconds, which is almost eight times faster!

As I’ve said before, I love taking out the slow parts!