Google PageSpeed Insights vs. SpiderNow

If you notice your site is taking a long time to load, then you should first use PageSpeed Insights to see what can quickly be optimized (also check your file sizes, hosting server, NGINX and other common sources of slow speed, too.) And, if you've notice gradually fewer Organic Search visits, PageSpeed Insights might be able to help. As Google is reducing the prevalence of slow sites, you could be losing traffic. Speed up your page load times by finding what is blocking renders, slowing down contentful paints, and other critical page speed signals.

Incentivized

• Measure page loading time
• Compared loading times against Google's benchmarks
• Identifies opportunities for web page performance improvements
• Identifies sub-optimal web page attributes that slow down page loading
• Compare performance on mobile and desktop devices easily

Incentivized

• The suggestions for improvement can be technical for non-developers.

Incentivized

It's a free, easy to use tool

Incentivized

There is no support from Google for the tool.

Incentivized

I think GTmetrix has some feedback that PageSpeed doesn't provide, but Google's tool is easier overall and has a better user experience; also offers compressed images, CSS, and javascript files if that's the case. Also, Google has extensive documentation to help you better understand what can be done to improve your grade.

Incentivized

• Faster loading site, give results faster to visitors
• Buyers can get to the end of the buying cycle faster

Incentivized