on Just Publishing Advice:
If your blog is slow, you will lose readers fast. It will also have a negative effect on your SEO.
Here are 9 free website speed test tools for you to make sure your website or blog is delivering fast page load times for your readers.
Each one has different ways of measuring website performance so it is important that you never trust only one tool for definitive speed test results.
The best way to check your page load time is to use a range of tools and to test from multiple locations.