<div class="gmail_quote">On Tue, Dec 20, 2011 at 13:03, Matthew Knepley <span dir="ltr"><<a href="mailto:knepley@gmail.com">knepley@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
3) Ignore duplicates on traversal. This would be fast, its just a question of the memory overhead</blockquote></div><br><div>If I'm on the same page, this is likely a problem because it's common to have O(100) duplicates.</div>