The Practical Guide To Speeding Up Your Shopify Store

Shopify hosts the store, serves the images from a CDN and handles the checkout. The parts you control are the theme, the apps and the scripts you added yourself. That is also where every slow store we have audited lost its time. The platform is rarely the problem.

Start by measuring the right thing

A single score out of a hundred is a poor guide. Measure the metrics that describe what a person experiences: how long until the main content appears, how long until the page responds to a tap, and how much the layout shifts while it loads. Then measure them on a mid range phone on a normal connection, not on the office wifi.

Where the time goes

• Apps. Every app that renders on the storefront ships JavaScript to every page, often whether or not the page uses it. An app you stopped using six months ago may still be loading.
• Images. Oversized files, images without dimensions set, and hero media loading before anything else. Shopify will resize for you if the theme asks it to.
• Theme code. Sections that load libraries for a feature used on one template. Fonts loaded twice. Sliders on pages with one slide.
• Third party scripts. Analytics, chat, reviews, pixels. Each one is a request and a script, and nobody ever removes the old ones.

What to fix first

Uninstall apps you do not use, and check that their code left with them. Many leave snippets in the theme after removal. Then look at the largest element on your slowest page, which is almost always an image, and make sure it is sized correctly and loaded eagerly while everything else waits. Those two jobs, done properly, tend to beat weeks of micro optimisation.

Audit your apps twice a year. A store’s app list only ever grows unless someone makes it their job to prune it.

What makes less difference than people think

Chasing a perfect score. Minifying assets that were already small. Switching themes because the new one demos faster with three products in the catalogue. And speed apps, which usually add a script in order to defer other scripts, and produce a better score without producing a faster page.

When speed is a build problem

If your catalogue is large, your collection pages carry heavy filtering, or your storefront depends on several apps that each render on the page, the fix stops being a checklist and becomes a build decision. That is where theme architecture work, and occasionally a headless front end, earns its cost. Bring the store to a call and we will tell you which of the two you need, and when the honest answer is neither.