GTmetrix Performance Blog News, updates and guides on GTmetrix and general web performance Tag: vulnerability Meltdown/Spectre & GTmetrix: How patched servers affected us – and potentially you. General / January 4, 2018 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. Search the Blog Categories Case Studies Changes General How to Guides Optimization Explained Using GTmetrix Recent Posts How to use History Graphs API v2.0 and Custom Plans Now Available How to test with Cookies Why is my GTmetrix Performance Score different from PageSpeed Insights, WebPageTest, and web.dev? Which location should I test from?