view tests/test-diff-issue2761.t @ 18815:a18919de61e5

dirstate.walk: fast path none-seen + match-always case for step 3

This case is a common one -- e.g. `hg diff`.

For a repository with 170,000 files, this speeds up perfstatus from 0.95
seconds to 0.88.

Test issue2761

  $ hg init

  $ touch to-be-deleted
  $ hg add
  adding to-be-deleted
  $ hg ci -m first
  $ echo a > to-be-deleted
  $ hg ci -m second
  $ rm to-be-deleted
  $ hg diff -r 0

Same issue, different code path

  $ hg up -C
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ touch does-not-exist-in-1
  $ hg add
  adding does-not-exist-in-1
  $ hg ci -m third
  $ rm does-not-exist-in-1
  $ hg diff -r 1