PageSpeed Insights version 5 is now based on another speed tool developed by Google called Lighthouse to evaluate the speed of your site. You can read more about this here.
PageSpeed Insights v5 places a different level of importance on various factors affecting speed when generating a score compared to v4.
While there are some positives to this change, there are some updates that just don’t make sense for merchants like yourself.
My scores dropped, is my shop slower?
No. Your shop is no slower than it was before this change.
Many merchants who previously had strong PageSpeed scores have seen notable drops, especially in mobile scores.
How does Plug in Speed help?
Plug in Speed will continue to help your real-world speed the same as it always has.
Image and code optimizations continue to be a key component of maintaining a healthy speed and ensuring that your customers have a faster experience on your site.
Why does my score appear differently on PageSpeed insights vs. Plug in Speed?
This variation is normal.
Google has addressed this, saying that a PageSpeed score can vary each time it is measured despite nothing on your site changing. view source This happens because speed can be influenced by a number of factors that Google is unable to control.
Since the v5 update, we have seen the PageSpeed score for a single shop vary by as much as 20 points each time speed was measured. While the current PageSpeed scores can provide helpful insights into the speed of your shop, we don’t recommend using them as a concrete benchmark for evaluating speed improvements.
What else can I do?
Some common speed issues that we’ve seen are:
- Using too many Shopify apps
- Using heavyweight Shopify apps which load many resources
- Displaying a large amount of content on a page
- Dimensionally large images (we optimize file size but do not resize dimensions in order not to break themes)
- Loading too many webfont variations in your theme
Many of these speed issues are complex need to be resolved on a case-by-case basis with a developer.
If you'd like a free analysis of which apps and other factors are having the most significant impact on your speed email us at firstname.lastname@example.org. We’d be happy to provide you with a personalised report.
Any other questions? Just email us, we’re here to help.