YSlow
A performance testing tool that grades websites hosted on servers, offering detailed insights and recommendations to improve speed, efficiency, and experience.
YSlow is a website performance analysis tool developed by Yahoo that evaluates web pages against a set of rules for high-performance websites and provides actionable recommendations for improvement. It analyses various aspects of your hosted site including file sizes, caching configurations, number of HTTP requests, CDN usage, JavaScript and CSS optimisation, and image compression. YSlow assigns grades for each performance category and an overall score, making it easy to identify areas needing attention. While newer tools like Google PageSpeed Insights and Lighthouse have become more popular, YSlow's principles remain relevant and many of its recommendations are still considered best practices for web performance. The tool helps you understand how your hosting configuration, file organisation, and code structure impact loading times and user experience. By following YSlow's suggestions, you can reduce server load, decrease bandwidth usage, improve page load times, and deliver better experiences to visitors regardless of their connection speeds or devices.
