So I'm running a Shopify website with a purchased theme and custom designs.
We are being notified by the Shopify backend system that the site speed is rather slow (30/100).
What are ways to improve this?
I know the Lighthouse speed checker, but the data that this tool generates is very abstract. Are there Shopify solutions to this?
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TBH, you don't need to worry about site speed as much as you think you need to.
The reason is that there are limited things that you can really do or should do.
If you have developer go into the site they definitely can make a lot of optimizations, but it opens you up to issues down the road with maintenance and changes.
The best thing you can do is optimize your images by compressing them and serving the right size of the images to the right device size. Then just removing any unnecessary apps that your server may use. Look particularly for those that install code in your theme, because those are typically blocking your site from being functional until that script loads.
Otherwise, I personally don't recommend doing too much more unless you have a web developer on hand.
Easy way to improve your site speed is fix the 404 errors which are wasted requests. The fewer the requests the better is the name of the game for site speed 😉 . See screenshot below.
Also it seems you are not using lazy loading for your images and videos. Consider doing so, we have a video tutorial on lazyloading videos here https://www.youtube.com/watch?v=LxzdCCiWwSs&t=11s
Store speed depends on multiple factors
3) CSS and js handling(effect by using plugins)
we have faced the speed issue on modstudio last week, but now it is totally fixed and have 90+ score
You can take our service too.