The problem I had to solve is how to make file processing as fast as possible. Having a bunch of files ( 500 to 2000+) I have to process them (let s call this scanning ). The sequential approach (one after another) proven to be too slow. Machines have more cores today and the idea to have this file scanning running in multiple threads is something that must speed up the entire process.-The problem I had to solve is how to make file processing as fast as possible. Having a bunch of files ( 500 to 2000+) I have to process them (let s call this　scanning ). The sequential approach (one after another) proven to be too slow. Machines have more cores today and the idea to have this file scanning running in multiple threads is something that must speed up the entire process.