How to figure out, what slows down docker?

Question

My problem is the following - I have Docker on OSX with containers containing Redis, NginX, PHP 7 and Unison. Mapped to php-container I have volume with Symfony 3.1.7.

Everything works, but Symfony's "Welcome" page taked ~1.5 second loading time on average. At the same time same setup without docker gives me 0.2 second loading time. Same difference I got for Symfony's console commands, so, I guess, it's not the problem with NginX, and Unison should've negated all issues related to Docker files sync on OSX problem.

Right now I've ran out of ideas what can I do to speed things up and how to figure out what creates that 1.5s delay.

I have same issue on my second MBP, but such thing does not happen on colleagues laptop, which is similar to the one I have, but we were unable to find any difference between two setups.

Everything is running on my MBP with 2.5 GHz i5, 8 Gb RAM and SSD.

Docker 1.12.3, OSX 10.12.1 (Sierra)

docker-compose.yml:

mydockerbox-redis:
  image: phpdockerio/redis:latest
  container_name: mydockerbox-redis

mydockerbox-webserver:
  image: phpdockerio/nginx:latest
  container_name: mydockerbox-webserver
  volumes:
      - ..:/var/www/mydockerbox
      - ./nginx/nginx.conf:/etc/nginx/conf.d/default.conf
  ports:
   - "80:80"
  links:
   - mydockerbox-php-fpm

unison:  
  image: leighmcculloch/unison:latest  
  environment:  
    - UNISON_WORKING_DIR=/unison  
  volumes:
    - ../mydockerbox:/var/www/mydockerbox
  ports:  
    - "5000:5000"

mydockerbox-php-fpm:
  build: .
  dockerfile: php-fpm/Dockerfile
  container_name: mydockerbox-php-fpm
  volumes_from:  
    - unison  
  volumes:
    - ./php-fpm/php-ini-overrides.ini:/etc/php/7.0/fpm/conf.d/99-overrides.ini
  links:
    - mydockerbox-redis

UPD And here is Dockerfile for php-fpm container:

FROM phpdockerio/php7-fpm:latest

# Install selected extensions and other stuff
RUN apt-get update \
    && apt-get -y --no-install-recommends install  php7.0-mongodb php7.0-redis php7.0-igbinary \
    && apt-get clean; rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* /usr/share/doc/*


WORKDIR "/var/www/mydockerbox"

Answer 1

I suggest you to use the docker-machine-driver-xhyve:

docker-machine/libmachine driver plugin for xhyve/hyperkit (native macOS hypervisor.framework)

You can simply install with brew (I hope you have already installed docker&Co with brew also, otherwise unlink and install them with brew!):

brew install docker-machine-driver-xhyve
sudo chown root:wheel $(brew --prefix)/opt/docker-machine-driver-xhyve/bin/docker-machine-driver-xhyve
sudo chmod u+s $(brew --prefix)/opt/docker-machine-driver-xhyve/bin/docker-machine-driver-xhyve

Then you can create a docker machine as:

docker-machine create --driver xhyve --xhyve-experimental-nfs-share my-xhyve-docker-machine

and use it for run your container