Why is my Shopify Dawn theme speed low despite optimized images?

[zamanhasanov96]

I test Geometrix Test. It is excellent. But Shopify give my website bad score

I use only WEBP image 5-6 pcs in the home page

And I created a few product image in the product page

How I resolve this issue? It is important for me

[Mac]

Hi, @zamanhasanov96!

Thanks for reaching out in our Community forums and for sharing your concern, I’d be happy to point you in the right direction.

I understand the importance of having a fully optimized store to have the highest score possible. As you may be aware, there are many variables that we need to consider when it comes to increasing website speed. We have to keep in mind that the online store speed score is calculated based on similar stores. For example, if a few similar stores optimize their images and remove unused apps, then the number of stores that are faster than yours might increase, lowering your comparative ranking.

I ran your store through a PageSpeed Insights test and noticed that your store is great for the desktop version but is scoring poorly through the mobile test. Your store has two main opportunities for improvement: Reduce unused JavaScript and to Reduce initial server response time. Based on the diagnostics, it seems like your site has a lot of third party code as well. I'd recommend reviewing our resources on online store speed and our helpful guide on the balance between online store features and speed to learn more about the factors affecting this.

You can also speak with Shopify Experts. This is a marketplace that connects you to professionals in a variety of fields related to your e-commerce business. Doing so will allow you to outline your exact requirements and specifications to speed up your store. If you would like to know more about finding the right Expert, please click here. 

Feel free to let me know if you have more questions!

[zamanhasanov96]

I understood. But ı use only 4-5 WEBP image my home page. Why google speed give me 33 rank in mobile and my product page have 8-10 (Total 800 kb) images, 1-2 gif(2, 3 mb) and text. This page rank is 10. Dekspot is ok. I use dawn thema. I do not use many app. I only use reviews, marketing and live chat app. I used premium thema ı change my thema to free dawn but problem not resolved. For test ı open a new shopify store and install dawn thema with zero app. And test google speed light it is give me 43 rank. With 0 apps, 0 images 44 ranks. It is terrible. I need more help resolve this problem

[Artzen_tech · Accepted solution]

@Zamanhasanov96
I can understand your concern about speed when you have 0 app, 0 images on another store and when you have few apps and few images on another store.

1. Shopify uses PageSpeed Insights(PI) tool to show the average speed of your store in the backend. Both Gtmetrix and PI use some different parameters to test the speed and show speed accordingly. that's why both could show different speeds numbers for a webpage.

2. Achieving speed 40+ in google mobile is very difficult as compared to desktop. so if you have 40+ mobile speed,  then your store has far better speed as compared to many other stores.
3. if you want to have 50+ speed in PI mobile then you will have to reduce the content on pages and use very few apps.
4. Also you can put the scripts in condition for example if something is not required on the homepage then do not include it on the homepage.

[zamanhasanov96]

I get my performance in mobile 47-55 sametimes 70. It is ok. I think that my speed should be 90+. Thank you for reply. If 40+ good. My problem resolved

[Mac]

Hi, @zamanhasanov96!

Thank you for providing that additional context, @Artzen_tech! I would like to add that when doing tests on both desktop and mobile, I did not notice any speed or loading issues. 

It's great to see that you're constantly looking to improve your store for your customers, so feel free to let us know if you have any further questions or concerns.

Cheers! 

[oreoorbitz]

Do you have a link to that test store?
Dawn is one the best performing shopify themes,
I tested the dawn theme I use for experimenting, with 0 apps, and the same hero image you have, and the score on mobile was 70-80.

The apps you have aren't exactly light, it's not a case of 10 apps equals minus 10 points, 
One app can weight 1mb and tank your Time to Interactive and Total Blocking time scores.

Your worse performing page is the product page, right?
It seems you had custom coding done (by https://bluish.io/ according to the comment) which is resulting in a horrible PSI score. Not saying that their code itself is bad, but the technical choices they made are horrible for performance.
Also, GIF's are Horrible for performance, a GIF, on average, is 2mb. Your GIFs are wrecking your PSI score.

On the topic of PSI score, and if what you have is good, check your competitors, if they have  a better PSI score than you, consider improving your site's performance.