Apache Benchmark for your Heroku app

First, install Dockhero addon and CLI plugin

$ heroku plugins:install dockhero
$ heroku addons:create dockhero  # installation will take some time

Now you can run Apache Benchmark remotely like this (replace https://docker.io/ with the website you want to benchmark, e.g. your Heroku app url):

$ heroku dh:docker run jordi/ab ab -v 2 https://www.docker.com/

This command will be launched in a Docker container in AWS, in the same availability zone where your Heroku app is hosted.