quark added a comment. It seems `mdiff.textdiff` used by `perfbdiff` won't actually use xdiff. Maybe `perfunidiff --config experimental.xdiff=1` should be used instead? REPOSITORY rHG Mercurial REVISION DETAIL https://phab.mercurial-scm.org/D2627 To: indygreg, #hg-reviewers, quark Cc: mercurial-devel