Thoughts on file ids

[John Arbash Meinel]

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On 05/06/2011 03:42 PM, Martin Pool wrote:
> Yeah, I was thinking of wt access possibly being simpler and faster by
> name, but you're right this will need testing and may well be a problem
> for committed trees.
> 

I think right now any api which is performance sensitive takes a "path"
hint. And I know we make use of it in many places. dirstate itself
prefers to lookup by path, because it stores things by path. If you pass
a file-id it reads all entries and creates a file_id => path mapping.

We do this because WT level operations are, indeed, generally done by
path (status path, commit path, etc.) but repository level operations
are generally done by file-id (log over history of a file, diff, etc.)

John
=:->

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