patch applied (packages/base): Cache for powers of 10

[Simon Marlow]

Sun Oct 24 12:07:07 PDT 2010  Daniel Fischer <daniel.is.fischer at web.de>
  * Cache for powers of 10
  Add a cache for commonly needed powers of 10 to speed up floatToDigits.

    M ./GHC/Float.lhs -1 +10

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=packages/base;a=darcs_commitdiff;h=20101024190707-a0d69-c93d4a2f0c62e727d2f651fe35df1a893ce3c4ca.gz