Brian Goff b200f85ceb Use imageStore.Children instead of whole the Map ...

daemon cache was getting the whole image map and then iterating through
it to find children. This information is already stored in the image
store.

Prior to this change building the docker repo with a full cache took 30
seconds.
After it takes between 15 seconds or less (As low as 9 seconds).
This is an improvement on docker 1.9.1 which hovered around 17 seconds.

Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Upstream-commit: 1350e8b7b8025d73056b800963c001fb9619a85c
Component: engine

2016-01-26 14:12:56 -05:00

..

engine

Use imageStore.Children instead of whole the Map

2016-01-26 14:12:56 -05:00