PageGym

About PageGym

PageGym is a website speed testing and optimization tool. It analyzes page load behavior, measuring time to first byte (TTFB), detecting render-blocking resources, and identifying layout shift problems to help pinpoint performance bottlenecks.

The tool includes a comparison feature that lets users test a page before and after changes and view a side-by-side breakdown of the performance impact. It also offers an experimentation feature that allows users to test optimization changes without modifying their site's code, to see what improves or hurts performance before implementing changes.

Additional tools include a Fallback Optimizer, Cache-Control tool, and BotMode. The product is aimed at developers and website owners who want to test, compare, and improve page load performance.

Key features

• Tests website load speed and page performance
• Measures Time to First Byte (TTFB)
• Detects render-blocking resources
• Identifies layout shift problems
• Compares test results side-by-side to measure performance impact of changes
• Runs optimization experiments without modifying site code

Frequently asked questions