We[1] used to think that you do not need to worry about lazyness, too - but ran into massive issues with large memory usage and massive GC pauses. We introduced

We[1] used to think that you do not need to worry about lazyness, too - but ran into massive issues with large memory usage and massive GC pauses. We introduced a policy that all fields of a data type must be strict (no Lists, no Maybe, no Either, ..., all custom strict types). That solved the issue for us. [1]: http://cpmed.de/ http://cpmed.de/