[PATCH 1 of 4] manifest: make lru size configurable

[Pierre-Yves David]

On 02/03/2015 03:19 AM, Durham Goode wrote:
> # HG changeset patch
> # User Durham Goode <durham at fb.com>
> # Date 1422061563 28800
> #      Fri Jan 23 17:06:03 2015 -0800
> # Node ID 83bf8c0ecb425fb64903d93918227c162bca111d
> # Parent  8b88870cbd1eeefaee0af053ae36728f8c0a1847
> manifest: make lru size configurable
>
> On machines with lots of ram, it's beneficial to increase the lru size of the
> manifest cache.  On a large repo, configuring the lru to be size 10 can shave a
> large rebase (~12 commits) down from 95s to 70s.

The option for this appears to be

'ui.manifestcachesize' this is hardly a 'ui' option. We currently do not 
have a good section to fit this. (not really format, not really ui). 
maybe we could rename the `workers` section to `ressources` or 
`performances` or `tuning`. And put them both there.

Patch code looks good otherwise (and feature is cool)


-- 
Pierre-Yves David