5c15ed64de
Now that the treap is first-fit, we can make a nice optimization. Mainly, since we know that span splitting doesn't modify the relative position of a span in a treap, we can actually modify a span in-place on the treap. The only caveat is that we need to update the relevant metadata. To enable this optimization, this change introduces a mutate method on the iterator which takes a callback that is passed the iterator's span. The method records some properties of the span before it calls into the callback and then uses those records to see what changed and update treap metadata appropriately. Change-Id: I74f7d2ee172800828434ba0194d3d78d3942acf2 Reviewed-on: https://go-review.googlesource.com/c/go/+/174879 Run-TryBot: Michael Knyszek <mknyszek@google.com> Reviewed-by: Austin Clements <austin@google.com> |
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