D477: revlog: add option to mmap revlog index

[durin42 (Augie Fackler)]

durin42 accepted this revision.
durin42 added a comment.


  I'm landing this, but we should plan to figure out the right tradeoff values and get it on by default or discard the extra complexity at some point. That doesn't have to be before 4.4, but it'd be nice to have that sorted out by 4.5.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D477

To: mbthomas, #fbhgext, indygreg, #hg-reviewers, durin42, quark
Cc: durham, quark, durin42, simonfar, mercurial-devel