Docker inter-container communication painfully slow (Mac OS X) -

i've got angularjs application running on nginx in container1. when hits "/api" gets proxied on docker container2 (a php api running on apache). php api accesses database running locally on mac os x. docker containers ubuntu.

communication between containers slow. idea why?

boot2docker start docker run -d -h docker --name container2 -v ~/container2dir/:/var/www -p 5000:80 seanbollin/image2 docker run -d -h docker --link name:api -v ~/somefolder/:/var/www/anotherfolder/ -p 5001:80 seanbollin/image1