#5317: non-linear complexity of :reload combined with :module in ghci
---------------------------------+------------------------------------------
Reporter: SimonHengel | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler
Version: 7.0.3 | Keywords:
Testcase: | Blockedby:
Os: Unknown/Multiple | Blocking:
Architecture: Unknown/Multiple | Failure: None/Unknown
---------------------------------+------------------------------------------
{{{ghci}}} shows non-linear time complexity for a sequence of
{{{:module}}} and {{{:reload}}} commands, say we do multiple times:
{{{
ghci> :module *Foo
ghci> :reload
}}}
Steps to reproduce:
{{{
$ time for i in {1..10}; do echo -e ':m Prelude\n:r'; done |ghci
$ time for i in {1..99}; do echo -e ':m Prelude\n:r'; done |ghci
}}}
On my system the first run uses 1 second of CPU time, the second 39
seconds.
(with GHC 7.0.3, Linux x86_64)
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5317>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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