Better perf?

I’m getting this perf improvement from T5837, which is type-function heavy. Is anyone else seeing this bytes allocated value is too low: (If this is because you have improved GHC, please update the test so that GHC doesn't regress again) Expected T5837(normal) bytes allocated: 48507272 +/-10% Lower bound T5837(normal) bytes allocated: 43656544 Upper bound T5837(normal) bytes allocated: 53358000 Actual T5837(normal) bytes allocated: 42384144 Deviation T5837(normal) bytes allocated: -12.6 % Its good, but I’d quite like to know which patch made the difference. Could it be commit 03541cbae50f0d1cdf99120ab88698f29a278159 Author: Simon Peyton Jones Date: Fri Sep 9 17:42:42 2016 +0100 Be less picky about reporing inaccessible code Seems implausible, but possible I suppose. Simon