Catalog search is VERY slow.

[mkatzpdp]

I have 723756 items in the index.

The original launchy could search this in less than a second, it takes this version 10 seconds to find the word disk. about 3 seconds to echo the d.

I am running on an Intel I7-4960X Extreme CPU (over clocked to 4GHz) with 64GB of DDR3 memory. This is a powerful CPU so I don't think I'm CPU bound.

Since you are building an index rather than just searching the directory paths you could build some kind of data base structure like R-Tree, or keep the index sorted and do a binary search.