GTmetrix Performance Blog News, updates and guides on GTmetrix and general web performance Tag: security 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 GTmetrix Bookmarklet – Start a Test from your Bookmarks Bar! Throttling updates and CDN additions How to test with Custom Connection Speeds with GTmetrix Black Friday/Cyber Monday 2017: Performance Blips and Blunders of Top Online Retailers Meltdown/Spectre & GTmetrix: How patched servers affected us – and potentially you.