i18n: detect UI language without POSIX-style locale variable on Windows (BC) On Windows, it isn't common to set LANG environment variable. This patch makes gettext honor Windows-style UI language [1] if no locale variables are set. Because of this change, LANG=C or HGPLAIN must be set in order to disable translation on non-English Windows. [1]: http://msdn.microsoft.com/en-us/library/dd374098(v=VS.85).aspx

locate: use ctx.matches instead of ctx.walk On mozilla-central, which is around 100,000 files, best of 5: $ hg --time locate > /dev/null before: real 1.460 secs (user 1.140+0.000 sys 0.320+0.000) after: real 0.620 secs (user 0.610+0.000 sys 0.020+0.000) $ hg --time locate README > /dev/null before: real 0.630 secs (user 0.330+0.000 sys 0.290+0.000) after: real 0.120 secs (user 0.110+0.000 sys 0.020+0.000) Larger repositories see correspondingly larger performance gains.

context: add a method to efficiently filter by match if possible For non-working contexts, walk and matches do the same thing. For working contexts, walk stats all the files and looks for unknown files, while matches just filters the dirstate by match.

dirstate: add a method to efficiently filter by match Current callers that require just this data call workingctx.walk, which calls dirstate.walk, which stats all the files. Even worse, workingctx.walk looks for unknown files, significantly slowing things down, even though callers might not be interested in them at all.

purge: prefer util.unlink instead over own removefile

keyword: bump copyright year