In the evolving and highly competitive digital world, web page performance is a crucial factor that can create or damage the success of your online presence. Whether you’re running a personal blog, an e-commerce site, or a corporate website, you must improve web page performance and speed of your website. It plays a significant role in user experience and search engine rankings.

The presentation starts by suggesting that JavaScript is typically the #1 place to look for making a website faster. My anecdotal experience supports this hypothesis, but I wanted to try to do some quantitative verification. As often happens, I turned to WebPagetest.

I wanted to test the Alexa Top 100 URLs with and without JavaScript. To load these sites withOUT JavaScript I used WebPagetest’s “block” feature. I entered “.js” which tells WebPagetest to ignore every HTTP request with a URL that contains that string. Each website was loaded three times and the median page load time was recorded. I then found the median of all these median page load times.