dirstate: speed up read and write
read:
- single call to len(st)
- fewer assignments for position tracking
- don't split apart tuple from unpack
- use a literal for the unpack spec
write:
- localize variables and functions
- avoid copied function call
- use % for string concatenation
#!/bin/sh
mkdir t
cd t
hg init
echo a > a
hg add a
hg commit -m "test" -d "1000000 0"
hg verify
hg parents
hg status
hg rollback
hg verify
hg parents
hg status