From mboxrd@z Thu Jan  1 00:00:00 1970
From: Junio C Hamano <junkio@cox.net>
Subject: Re: [Census] So who uses git?
Date: Tue, 31 Jan 2006 18:31:58 -0800
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To: Linus Torvalds <torvalds@osdl.org>
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Linus Torvalds <torvalds@osdl.org> writes:

> They're fast, because they are purely in the cache (well, git-update-index 
> obviously isn't, but the new op wouldn't be any _slower_ than the old 
> one).
>
> Looks simple enough. The big thing to remember is to clear that 
> "implicitly up-to-date" flag whenever we make changes (ie we'd probably 
> make "add_cache_entry()" always clear it, possibly with a flag to add it 
> as "pre-verified" which would set it).
>
> Comments? Junio, what do you think?

Somehow this reminds me of a "feature" we added quite a long
time ago to support "update-index without working tree".

I think this should work fine as a mechanism, but I am a bit
worried about the convenience and safety aspect.  It _might_
make sense to do what RCS does; check out read-only copy by
default and set the "assume unchanged" flag, to prevent people
from accidentally modifying the working tree copy without
telling the index about it.