Misconfigured patches can eat up memory at an exponential rate, killing your compositions. Or the problem can lurk more subtly, making the compositions jumpy or just slow. Unlike the built-in profiling tools, Performance Inspector performs a patch-by-patch analysis of the performance of your compositions while they're running, providing you with detailed information on which patches, exactly, are slowing your composition down. Technical info and purchase info available from kineme.net, as always.