Why is GHC so much worse than JHC when computing the Ackermann function?

Joachim Breitner mail at joachim-breitner.de
Sat Apr 20 22:12:31 CEST 2013


Am Samstag, den 20.04.2013, 13:03 -0700 schrieb Edward Z. Yang:
> I don't seem to get the leak on latest GHC head.  Running the program
> in GC debug mode in 7.6.2 is quite telling; the program is allocating
> *a lot* of megablocks.  We probably fixed it though?

it’s confirmed that it is fixed in HEAD. But it’d be really interesting
to know what the bug was and how it was fixed. Could someone who has a
setup for running bisect at his fingertips find out?


Joachim "nomeata" Breitner
Debian Developer
  nomeata at debian.org | ICQ# 74513189 | GPG-Keyid: 4743206C
  JID: nomeata at joachim-breitner.de | http://people.debian.org/~nomeata

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