#13080: Memory leak caused by nested monadic loops -------------------------------------+------------------------------------- Reporter: Feuerbach | Owner: Type: bug | Status: new Priority: normal | Milestone: 8.2.1 Component: Compiler | Version: 8.0.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by nomeata): In the blog post you write
Let’s change (“eta-expand”) the poll code as if then had arity 4, without actually changing then or thenIO or their runtime arities:
and that this fixes the space leak. Isn’t this eta-expansion exactly what the state hack is about? So why does it not not work here? Ah, becuase `poll` is not at type `IO a` but rather for an arbitrary `Monad`… yeah, then it’s harder. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13080#comment:11 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler