Javalobby - Discussion View [Threaded] "Version 0.0.7 of GNU Trove, a high-performance implementation of the java.util Collections api, has been released at SourceForge. Their benchmark results suggest that this is potentially very significant work, improving performance by as much as 500% and using about half the memory of the standard Java implementations. Trove is released under the LGPL, and the homepage says a simple "sed" script can switch back and forth between Trove and JDK implementations."