in reply to Using threads to process multiple files
Downvoted: Because the OP stated that his non-threaded version works fine; and he's trying to use threading to speed it up.
How could moving from his two memory-based hashes, to disk-based tied hashes "speed things up", when they are at least 1000 times slower.
Upvotes all around, sirs ... (as BrowserUK excellently describes)
Downvotes all around you, sir ...
for being obsequious.