tests/test-locate.out

dirstate.read: make 15% faster.
time to read dirstate for my kernel repo goes from 0.22s to 0.18s.

adding a
adding b
a
NONEXISTENT: No such file or directory
a
b
a: No such file or directory
NONEXISTENT: No such file or directory
b
a
NONEXISTENT: No such file in rev 14467d15ef43
a
b