Web performance checking with sitespeed.io

Sometimes tools are that awesome that you just want to spread the word. I guess I should do that more often. One fantastic tool is sitespeed.io. Sitespeed.io is a set of open source tools that will help you to analyze your website and gives you helpful advices to make your website faster.

Sitespeed.io docker container

You can install sitespeed.io via npm, but it is also shipped as docker container. I will try that docker container with my own blog.

Pull the docker container

We can pull the docker container with the following command.

docker pull sitespeedio/sitespeed.io
Using default tag: latest
latest: Pulling from sitespeedio/sitespeed.io

6bbedd9b76a4: Pull complete
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9c04650dded8: Pull complete
Digest: sha256:9a4de44562d3b35b9901f06a4397a7f468c714ce0581a00687923e8565c87d97
Status: Downloaded newer image for sitespeedio/sitespeed.io:latest

Run the docker container

We can run the docker container with the following command. The following example runs with Firefox, but Chrome is also possible.

docker run --rm -v "$(pwd)":/sitespeed.io sitespeedio/sitespeed.io https://gordonlesti.com/ -b firefox
Google Chrome 54.0.2840.71
Mozilla Firefox 49.0.2
[2016-11-25 08:36:48] Versions OS: linux 3.16.0-4-amd64 nodejs: v6.9.1 sitespeed.io: 4.0.7 browsertime: 1.0.0-beta.11 coach: 0.29.0
[2016-11-25 08:36:49] Starting firefox for analysing https://gordonlesti.com/ 3 time(s)
[2016-11-25 08:36:49] Testing url https://gordonlesti.com/ run 1
[2016-11-25 08:36:56] Testing url https://gordonlesti.com/ run 2
[2016-11-25 08:37:03] Testing url https://gordonlesti.com/ run 3
[2016-11-25 08:37:12] 6 requests, 359.33 kb, DOMContentLoaded: 1.51s (±353.45ms), Load: 1.62s (±318.09ms), rumSpeedIndex: 728 (±54.10) (3 runs)
[2016-11-25 08:37:12] Render HTML for 1 page(s)
[2016-11-25 08:37:13] HTML stored in /sitespeed.io/sitespeed-result/gordonlesti.com/2016-11-25-08-36-48
[2016-11-25 08:37:13] Finished analysing https://gordonlesti.com/

Web performance results

The results can be found in the directory sitespeed-result/gordonlesti.com/2016-11-25-08-36-48/, cause I have started my tests at 2016-11-25 08:36:48. Here for example the overview for my blog. I guess I have to improve a few things, but that should be no problem with the helpful advices of sitespeed.io.

Summary of the sitespeed.io result
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