quick performance measurements

[Richard Eisenberg]

On Feb 12, 2016, at 3:28 PM, Simon Peyton Jones <simonpj at microsoft.com> wrote:

> cd testsuite/tests/perf; make

But that tells me only about failures. What if I have a tweak that makes an average 1% improvement over lots of files? That would be a nice improvement, but we don't have an easy way to collect this info, I think, other than perf.haskell.org.