D6746: perf: don't pass experimental argument in config for older Mercurial versions

[pulkit (Pulkit Goyal)]

pulkit added a comment.


  In D6746#99035 <https://phab.mercurial-scm.org/D6746#99035>, @martinvonz wrote:
  
  > When this patch is ready, could we fold this into `a11fd395e83f`? I have `extensions.perf=contrib/perf.py` in my config and it's pretty annoying to have any commit in the broken range checked out.
  
  Folding this into `a11fd395e83f`.

REPOSITORY
  rHG Mercurial

CHANGES SINCE LAST ACTION
  https://phab.mercurial-scm.org/D6746/new/

REVISION DETAIL
  https://phab.mercurial-scm.org/D6746

To: navaneeth.suresh, #hg-reviewers
Cc: martinvonz, pulkit, mercurial-devel