[[!comment format=mdwn
 username="joey"
 subject="""comment 5"""
 date="2017-10-30T17:12:00Z"
 content="""
IIRC once git checks the work tree file one time and realizes it's not
really changed, it then avoids the unncessarily expensive operation
happening again.

These inneficiencies can't be fixed without changes to git. It's all
discussed in [[todo/smudge]] in detail.
"""]]