[commit: Cabal] master: switch goal reordering off by default (91e1fcb)

[Ian Lynagh]

Repository : ssh://darcs.haskell.org//srv/darcs/packages/Cabal

On branch  : master

http://hackage.haskell.org/trac/ghc/changeset/91e1fcbc8e3cc16e19b13b0f0cdf11ed650d2a37

>---------------------------------------------------------------

commit 91e1fcbc8e3cc16e19b13b0f0cdf11ed650d2a37
Author: Andres Loeh <andres at well-typed.com>
Date:   Sun Jul 3 13:52:17 2011 +0000

    switch goal reordering off by default
    
    It surprised me somewhat, but goal reordering seems to slow things
    down, even for backtracking packages. It was supposed to speed things
    up, but it's possible that backjumping works so nicely that it more
    than compensates for the effects. More systematic testing might be
    needed.

>---------------------------------------------------------------

 .../Client/Dependency/Modular/Solver.hs            |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/cabal-install/Distribution/Client/Dependency/Modular/Solver.hs b/cabal-install/Distribution/Client/Dependency/Modular/Solver.hs
index 24a4e59..0852784 100644
--- a/cabal-install/Distribution/Client/Dependency/Modular/Solver.hs
+++ b/cabal-install/Distribution/Client/Dependency/Modular/Solver.hs
@@ -25,7 +25,7 @@ data SolverConfig = SolverConfig {
 
 defaultSolverConfig :: Bool -> SolverConfig
 defaultSolverConfig ar = SolverConfig {
-  preferEasyGoalChoices = True,
+  preferEasyGoalChoices = False,
   pStrategy             = PreferLatestForSelected, -- latest for goals only
   avoidReinstalls       = ar
 }