So, for the sbt project we noticed significant resolution time improvements with the following patch:
https://github.com/sbt/ivy/pull/1 The reasoning: - A lot of artifacts being resolved use Maven's "dependencyManagement" conventions - Ivy appears to turn these into "exact matcher" rules - A ton of resolution time is spent filtering through these rules - The existing solution is O(n) for all overrides What the patch does: - Creates a key'd store for all "exact matcher" rules - When executing rules, ensure that we only traverse what we have to (non-exact, exact specific to our key and "default"). As I said, this represents a significant speed bump for sbt builds using Ivy. All existing tests pass, and I think they cover this aspect of ivy pretty well, from what I could see. What's the best mechanism to submit this back? Do you accept pull requests on github? Thanks! - Josh Suereth Tools Lead Typesafe, Inc.
