Extracting info from large structured text files

Question

I need to read some large files (from 50k to 100k lines), structured in groups separated by empty lines. Each group start at the same pattern \"No.999999999 dd/mm/yyyy ZZZ

Answer 1

It would be easier to help if you had a specific concern. Performance will depend greatly on the efficiency of the particular regex engine you are using. 100K lines in a single file doesn't sound that big, but again it all depends on your environment.

I use Expresso in my .NET development to test expressions for accuracy and performance. A Google search turned up Kodos, a GUI Python regex authoring tool.