Commit 33683ba9 authored by Simon Peyton Jones's avatar Simon Peyton Jones

Extra comment about the fix to Trac #5113

parent d72044dd
......@@ -1641,6 +1641,12 @@ variables?
We have to take care to put any new interesting dictionary
bindings in the set.
We accidentally lost accurate tracking of local variables for a long
time, because cloned variables don't have unfoldings. But makes a
massive difference in a few cases, eg Trac #5113. For nofib as a
whole it's only a small win: 2.2% improvement in allocation for ansi,
1.2% for bspt, but mostly 0.0! Average 0.1% increase in binary size.
interestingDict :: SpecEnv -> CoreExpr -> Bool
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