#2790: Use -fregs-graph by default
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Reporter: igloo | Owner: benl
Type: task | Status: new
Priority: high | Milestone: 6.14.1
Component: Compiler | Version: 6.8.3
Keywords: | Difficulty: Unknown
Os: Unknown/Multiple | Testcase:
Architecture: Unknown/Multiple | Failure: None/Unknown
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Comment(by benl):
Runtimes for vector benchmarks on x86. This is with -fregs-graph and
-fregs-iterative forced on for the entire build.
{{{
linear (ms) graph(ms)
listRank 31.274 28.033 (-11%)
rootFix 2.367 2.147 (-10%)
leafFix 2.007 1.798 (-11%)
awshcc 56.747 52.288 (-8%)
hybcc 5.836 5.314 (-10%)
quickhull 11.354 11.402 (+10%)
tridiag 2.402 2.362 (-0.1%)
}}}
I'm not sure what's going on with quickhull. In successive runs its
between 5% and 10% slower, but this is using criterion with 100 samples
each. Numbers for the other benchmarks are stable between runs.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2790#comment:21>
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