id summary reporter owner description type status priority milestone component version resolution keywords cc launchpad_bug 452 slowdown in _validate_crypttext_hashtree for large files warner "I was testing a download of a very large (5GB) file, which involved about 38000 segments. I saw _validate_crypttext_hashtree take about 12 minutes, and the first few segments take 5 or 6 minutes. Take a closer look at !IncompleteHashTree.set_hashes, I'm suspicious of an O(n^2^) problem therein. " defect closed minor undecided code-encoding 1.0.0 duplicate performance