#14519: Exponential runtime performance regression in GHC 8.2 + Data.Text.Lazy + Text.RE.TDFA -------------------------------------+------------------------------------- Reporter: ntc2 | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.2.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: Runtime | Test Case: performance bug | https://github.com/ntc2/ghc-8.2.1 | -regex-lazy-text-bug Blocked By: | Blocking: Related Tickets: 13745 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by ntc2): As suggested by @nomeata, I'm going to try bisecting GHC between 8.0.2 and 8.2.0 to discover when the performance regression was introduced. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14519#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler