GTmetrix Performance Blog
News, updates and guides on GTmetrix and general web performance
GTmetrix Bookmarklet – Start a Test from your Bookmarks Bar!
Quickly start a GTmetrix test on any page using our convenient bookmarklet. Read on for instructions on how to set it up!
Throttling updates and CDN additions
Now offering Broadband (slow, normal, fast) and LTE connection speeds for GTmetrix reporting, Custom Connection speeds for Developer Toolkit users, and new CDN additions.
How to test with Custom Connection Speeds with GTmetrix
Test your page load on customized connection speeds with GTmetrix. Useful if you want to test how a unique connection speed (high speed broadband, corporate fibre connection, etc.) may affect your site’s load performance.
Black Friday/Cyber Monday 2017: Performance Blips and Blunders of Top Online Retailers
We monitored over 50 sites from the UK and the United States to see how they held up with the online retail rush that is Black Friday and Cyber Monday.
Meltdown/Spectre & GTmetrix: How patched servers affected us – and potentially you.
On December 28th, 2017, our test servers were patched to protect against Meltdown and Spectre vulnerabilities. Upon reboot, we noticed an increase in job runtime – roughly a 10% increase to the norm.
Recent Posts
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GTmetrix Bookmarklet – Start a Test from your Bookmarks Bar!
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Throttling updates and CDN additions
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How to test with Custom Connection Speeds with GTmetrix
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Black Friday/Cyber Monday 2017: Performance Blips and Blunders of Top Online Retailers
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Meltdown/Spectre & GTmetrix: How patched servers affected us – and potentially you.