Shopify speed optimisation

Measure before anything is changed

"Slow" needs a number, and the right number comes from real visitors, not from a single test.

Google's Core Web Vitals are the three measurements used:

Google assesses each at the 75th percentile of page loads, so a store passes when three out of four visits are good, not when the owner's own phone feels fast.

There are three places to read them, and they do not agree with each other for good reasons.

WavX records all three before touching the store. If the field data is already good and only the Lighthouse score is low, there may be little worth paying for, and WavX says so.

What you control on Shopify

General advice on why a website is slow talks about hosting, server location and caching plugins. Little of that applies here. Shopify runs the servers and serves theme assets and images from its own CDN. What the merchant controls, in Shopify's own words, is the theme, the installed apps, and any third-party code added to the store, including tag managers and the tags inside them.

That narrows the work usefully. Shopify speed optimisation is an audit of what the store loads, followed by removing, deferring or rewriting it.

Where the time goes, and the fix for each

The cause that is easiest to overlook is accumulation: an app tried for a month and never removed, a tracking tag from a campaign that ended, a chat widget on every page of a store that answers chat on WhatsApp.

How WavX runs speed work

1. Baseline. Field and lab data for the home, collection, product and cart pages, on mobile. Screenshots are kept so the after-report compares like with like.
2. Inventory. Every app, every third-party script and every tag, with what it costs to load and who in the business uses it.
3. Decide with the owner. For each item: keep, restrict to certain pages, replace, or remove. This is a business decision, not a technical one. A reviews widget that slows the product page may still be worth it.
4. Work on a duplicate theme. Nothing is changed on the live theme until the copy has been tested.
5. Fix in order of effect. Removals first, then how images and scripts load, then the theme's own code.
6. Publish and measure. Lab results the same day; Shopify's reports within days; Google's field data after its 28-day window has turned over.
7. Report. The same measurements as the baseline, a list of what was changed, and a list of what was left and why.
8. Keep it fast. A short rule for the team: what to check before installing an app. For stores with a code repository, Shopify's Lighthouse CI action can test each theme change automatically.

Ongoing checks can be part of Shopify maintenance and support.

What speed work cannot do

• It cannot change Shopify's servers or checkout. Those are Shopify's.
• It cannot make a heavy app light. The choices are to load it later, load it on fewer pages, replace it or remove it.
• It cannot promise a score, a ranking or a conversion rate. Lighthouse scores vary between runs, and rankings and sales depend on much more than speed.
• It cannot show up in Google's field data overnight. The 28-day window has to pass.
• It does not last by itself. The next three apps installed without a check will undo it.

When you do not need to hire anyone

Start with the free steps, which an owner can do without a developer:

1. Open the web performance report in the Shopify admin and see which page type is rated poor.
2. Uninstall apps nobody has used this quarter.
3. Re-upload the home page banner at a sensible size and check it is not a video.
4. Remove old tags from the tag manager.
5. Update the theme if a newer version is available.

The general guide on how to speed up your website covers image and script basics that apply to any site. If the numbers are still poor after these steps, the remaining causes are usually in theme code, and that is developer work. The slow Shopify store page is a shorter diagnosis to read first.

It is also worth knowing when optimisation is the wrong purchase. A theme that is several years old, heavily edited and no longer receiving updates can cost more to repair than to replace. In that case WavX will recommend a current theme or a custom theme and say why.

Cost

Shopify speed work is quoted after the baseline, because the baseline shows how much there is to do. WavX's published guide on speeding up a website prints ₹20,000 to ₹50,000 for a basic audit and implementation on a small business website. That is a planning range, not a quote; a Shopify store with many apps and a heavily edited theme will differ. Speed work that is part of search performance more broadly sits under Core Web Vitals optimisation.