#12665: Make Read instances faster, and make them fail fast -------------------------------------+------------------------------------- Reporter: dfeuer | Owner: dfeuer Type: feature request | Status: new Priority: high | Milestone: 8.2.1 Component: Core Libraries | 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 dfeuer): So I don't forget: when we improve `Read Integer` and `Read Natural`, we probably want to make the radix-doubling thing start out coarser. I think we basically want to start with base `10^19` for decimal, etc., so that we work with chunks that fit in a `Word`. Essentially, start by parsing to a list of `Word`s, each of which represents a base-`10^19` digit, and then apply an appropriate algorithm to combine these all into an `Integer` or `Natural`. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12665#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler