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Opened by Vaibhav Sagar@vaibhavsagarReporter

Performance regression when using the GHC API to evaluate code compared to 8.4

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 #ghcbut I thought this was worth reporting as a bug.

To reproduce this on a Linux installation with Nix:

  1. git clone https://github.com/gibiansky/IHaskell
  2. cd IHaskell
  3. git checkout 6058cd4fac01a2023dbd09d174f1f8d4c36e7475
  4. Comment out --enable-executable-dynamic in release-8.6.nix
  5. nix-build release-8.6.nix
Edited by Vaibhav Sagar