M-R: Test performance impact (was: The dreaded M-R)

On Mon, 30 Jan 2006, "Simon Marlow" wrote:

Given the new evidence that it's actually rather hard to demonstrate any performance loss in the absence of the M-R with GHC, I'm attracted to the option of removing it in favour of a warning.

I also want to remove the M-R, because of various reasons that have been mentioned before. However, to stand on more solid ground I suggest that someone runs some performance tests, with and without -fno-monomorphism-restriction, to see whether the M-R has any great impact in practice. There are some performance test suites based on real code out there, right? Nofib? -- /NAD