[RFC] store inventory in tab-separated file

[Aaron Bentley]

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Alexander Belchenko wrote:

> 0) Does my work have sense to continue?

I think it may not make sense to continue.  Martin is working on a new
inventory format, which improves speed by dividing things by subtree.
Because it's a different data structure, we expect it will improve
performance more than a faster format would.

> 2) Why we are using 2 similar formats v5 and v6? Why for working inventory
> used v5 -- for speed-up reasons? Does I need implement v7 and v8 formats,
> or I need one rich format a-la v6?

I'm pretty sure the working inventory of WorkingTree3 is v5.  v6 is used
for the basis inventory, and that's because I expected we'd be switching
to knit2 quickly, and it's more efficient to retrieve a basis from a
knit2 in v6 format.

Short answer: only one format needed.

Aaron
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