Every merchant wants a fast site. But few know what fast really means in Google’s eyes.
Over the past few months, I wanted a clear answer to one question: What does “fast enough” actually look like for Shopify stores today?
So I built a benchmark from scratch.
The analysis covered 1,000 Shopify stores, testing each one through PageSpeed Insights for lab data and Chrome UX Report for real user data. Three Core Web Vitals were used to measure real-world performance:
- LCP (Largest Contentful Paint) shows how quickly the main content loads.
- INP (Interaction to Next Paint) shows how responsive it feels when users interact.
- CLS (Cumulative Layout Shift) shows how stable the layout is as it loads.
The results were then compared with Lighthouse performance data to reveal how Shopify stores are really performing, and how those numbers align with what shoppers experience every day.
The results
Most Shopify stores are slower than they think.
The average mobile LCP came in at 3.9 seconds, far above Google’s recommended 2.5 seconds. The average INP was 368 milliseconds, which is acceptable but leaves room for improvement. The average CLS was 0.13, which is good. Shopify’s platform handles layout stability better than most eCommerce platforms.
In short, Shopify merchants benefit from a solid foundation, but they often lose speed through unnecessary design elements, oversized hero images, and apps that load too much JavaScript.
Big Brands Are Not Always Faster
One surprise from the analysis was how little brand size matters.
Some of the biggest DTC names performed poorly. Beautiful designs, advanced tracking setups, and extra layers of personalization often led to slower load times.
Meanwhile, smaller brands that stuck with simple themes and limited third-party scripts performed far better.
Speed isn’t about resources. It’s about discipline and restraint.
Why speed matters more than ever
Performance affects visibility, conversions, and customer trust.
Fast sites rank higher, convert better, and are more likely to appear in AI-driven search experiences such as Google’s Search Generative Experience, ChatGPT, or Perplexity.
In 2026, speed will continue to directly influence how people, Google, and AI systems discover your brand.
A few quick truths:
- According to Cloudflare, a one-second delay can result in a 20% drop in conversions.
- Google’s crawlers prioritize pages that load efficiently.
- Customers are more likely to stay and buy when the experience feels instant.
What should merchants improve right now?
Improving speed is not about chasing a perfect PageSpeed score. It’s about fixing the handful of things that consistently drag performance down across almost every Shopify store tested.
Here’s where the data points to real gains:
1) Reduce hero image weight and prioritization errors
- More than 60 percent of tested sites had hero images larger than one megabyte.
- Compress and resize to under 500 KB.
- Use the “priority hints” attribute (fetchpriority="high") on your LCP image so browsers load it first.
- Avoid loading background videos or carousels above the fold unless absolutely necessary.
2) Clean up unused third-party apps and scripts
- On average, stores loaded scripts from 18 different domains, even on pages that didn’t need them.
- Remove legacy tracking scripts left behind after old integrations.
- Consolidate analytics tags inside Google Tag Manager and defer their load until after the main content paints.
- For live chat, use conditional logic so it loads only on support or cart pages.
3) Use Shopify’s native lazy loading and preloading tools properly
- Enable the loading="lazy" attribute on product images and review widgets below the fold.
- Add <link rel="preload"> tags for hero images and critical fonts to reduce LCP by up to 500 milliseconds on average.
- Preconnect to critical CDNs (for example, fonts.shopifycdn.com or your primary image domain) to improve time to first byte. A one-second delay can drop conversions by up to twenty percent.
4) Simplify your theme’s JavaScript and CSS
- Many custom themes have duplicated or blocking code left from older versions.
- Minify and combine CSS files where possible.
- Audit the theme.js bundle and remove legacy functions not used by current templates.
- Disable unused Shopify sections on pages that don’t need them.
5) Leverage native image delivery and compression features
- Shopify’s CDN already converts images to WebP automatically, but only if URLs use the .jpg or .png extensions without optimization parameters.
- Remove redundant “image optimization” apps that reprocess what Shopify already serves faster.
6) Make performance a shared KPI across teams
- High-performing stores share one common trait: someone owned speed internally.
- Track LCP and INP in Google Search Console and review them monthly.
- Treat Core Web Vitals like conversion metrics: measurable, reportable, and worth improving incrementally.
- Customers are more likely to stay and buy when the experience feels instant.
But the most important thing is to treat speed as an ongoing practice, not a one-time project. Every new feature, image, or app can affect performance. Keep it part of your regular workflow.
The Benchmark Report
The full 2025 Shopify Speed Benchmarks report is now live on the Shero Commerce site. It includes all 1,000 data points, comparisons, and recommendations.
👉 Read the full report here: Shopify Speed Benchmarks 2025 by Shero Commerce
Final Thought
Every second counts. A faster site isn’t just better for SEO. It’s better for your customers, your brand, and your bottom line.
The faster your store feels, the more trustworthy your business becomes. And that trust is what drives real growth.
This article first appeared on the Shero Commerce Blog. If you cite this in your content, please let us know so we can thank you! 👇
