turn off lazy evaluation in haskell

Question

Is it possible to turn off lazy evaluation in Haskell?

Is there a specific compiler flag of library to facilitate this?

I wanted to try something new with a old program that I had written a while back, to see if I can improve performance.

Answer 1

There are a number of ways to turn a lazy thing strict. You can:

1. Explicitly insert a spurious pattern match.
2. Use seq or its close relative ($!).
3. Use BangPatterns.
4. Use strictness annotations on your types.

More information here.