#14052: Significant GHCi speed regression with :module and `let` in GHC 8.2.1 -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: osa1 Type: bug | Status: patch Priority: high | Milestone: 8.4.2 Component: GHCi | Version: 8.2.1-rc2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime | Unknown/Multiple performance bug | Test Case: Blocked By: | Blocking: Related Tickets: #11547 | Differential Rev(s): Phab:D4478 Wiki Page: | -------------------------------------+------------------------------------- Comment (by Ömer Sinan Ağacan <omeragacan@…>): In [changeset:"98c7749cd360293bee96034056e260d70224cef6/ghc" 98c7749/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="98c7749cd360293bee96034056e260d70224cef6" Revert "GHCi: Don't remove shadowed bindings from typechecker scope." This reverts commit 59d7ee53906b9cee7f279c1f9567af7b930f8636 and enables the test for #14052. (See #14052 for the discussion) Reviewers: bgamari Reviewed By: bgamari Subscribers: rwbarton, thomie, carter GHC Trac Issues: #14052 Differential Revision: https://phabricator.haskell.org/D4478 }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14052#comment:21> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler