#15646: ghci takes super long time to find the type of large fractional number -------------------------------------+------------------------------------- Reporter: Johannkokos | Owner: | JulianLeviston Type: bug | Status: new Priority: normal | Milestone: 8.6.1 Component: GHCi | Version: 8.4.3 Resolution: | Keywords: newcomer Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by JulianLeviston): Chatted a bit more with osa1 about this now on IRC. Seems TH has the same issue(s), because the use-sites for `mkFractionalLit` includes the `cvtOverLit :: Lit -> CvtM (HsOverLit GhcPs)` function from hsSync/Convert.hs... the `cvtOverLit (RationalL r)` clause, which reads: ``` cvtOverLit (RationalL r) = do { force r; return $ mkHsFractional (mkFractionalLit r) } ``` -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15646#comment:27 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler