#15524: Performance regression when using the GHC API to evaluate code compared to 8.4 -------------------------------------+------------------------------------- Reporter: vaibhavsagar | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.6.1 Component: Compiler | Version: 8.6.1-beta1 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: -------------------------------------+------------------------------------- I've been in the process of updating IHaskell to support GHC 8.6 and the test suite has become agonisingly slow as compared to GHC 8.4 and below. I've been able to work around this by using `--enable-executable-dynamic` as suggested by `christiaanb` on `#ghc`but I thought this was worth reporting as a bug. I am using `ghc-8.6.1-alpha2` so it's possible that this has been fixed in `beta1`. To reproduce this on a Linux installation with Nix: 1. `git clone https://github.com/gibiansky/IHaskell --branch support- ghc-8-6 repro` 2. `cd repro` 3. Comment out `--enable-executable-dynamic` in `release-8.6.nix` 4. `nix-build release-8.6.nix` -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15524 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler