Is there a fast way to parse through a large file with regex?

Question

Problem: Very very, large file I need to parse line by line to get 3 values from each line. Everything works but it takes a long time to parse through the whole file. Is it poss

Answer 1

Memory Mapped Files and Task Parallel Library for help.

1. Create persisted MMF with multiple random access views. Each view corresponds to a particular part of a file
2. Define parsing method with parameter like IEnumerable, basically to abstract a set of not parsed lines
3. Create and start one TPL task per one MMF view with Parse(IEnumerable) as a Task action
4. Each of worker tasks adds a parsed data into the shared queue of BlockingCollection type
5. An other Task listen to BC (GetConsumingEnumerable()) and processes all data which already parsed by worker Tasks

See Pipelines pattern on MSDN

Must say this solution is for .NET Framework >=4