On Mon, Jan 7, 2013 at 4:06 AM, Joachim Breitner
I’m wondering if the use of deepseq to avoid unwanted lazyness might be a too large hammer in some use cases. Therefore, I’m looking for real world programs with ample use of deepseq, and ideally easy ways to test performance (so preferably no GUI applications).
I never use deepseq, except when setting up benchmark data where it's a convenient way to make sure that the data is evaluated before the benchmark is run. When removing space leaks you want to avoid creating the thunks in the first place, not remove them after the fact. Consider a leak caused by a list of N thunks. Even if you deepseq that list to eventually remove those thunks, you won't lower your peak memory usage if the list was materialized at some point. In addition, by not creating the thunks in the first place you avoid some allocation costs. -- Johan