Stats file has wrong numbers
The summary numbers in the file generated with the -S flag cannot be right. Here's an example:
1,943,795,468 bytes allocated in the heap 17,587,189,232 bytes copied during GC
The corresponding numbers with ghc 7.2 are
193,859,474,520 bytes allocated in the heap 17,766,908,288 bytes copied during GC
While it's theoretically possible that allocation has improved that much, I don't believe it.