Got an error that I could find for a while. It was when parsing a lot of
files.
Turn out it was the Thread Pool or something because if I run on 1 core,
it's ok.
Different thing in this commit, I just want to freeze a state that
benchmark work.
Before I was parsing all files, getting the max index then parsing from
0 to the max.
Byt now that I delete empty files, I need to parse only existing one.
