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Fastest Ecommerce Platforms Compared (2026)

25 February 2026·PageDiag·10 min read

Key Takeaways

  • Shopify has the most consistent performance out of the box, with median LCP around 2.8 seconds
  • WooCommerce has the widest performance range - it can be the fastest or the slowest depending on hosting and configuration
  • BigCommerce performs similarly to Shopify but with slightly heavier theme JavaScript
  • Magento (Adobe Commerce) tends to have the slowest server response times without serious infrastructure investment
  • Squarespace is surprisingly competitive on smaller sites but struggles with large catalogues
  • Platform choice matters less than implementation - a well-optimised WooCommerce store beats a bloated Shopify store every time
  • Test your own store's performance →

"Which ecommerce platform is fastest?" is one of the most common questions in ecommerce. It's also one of the most misleading, because the answer depends almost entirely on how the platform is configured and what's been added to it.

A stock Shopify store with the Dawn theme and no apps will load in under 2 seconds. A Shopify store with 15 apps, a heavy premium theme, and unoptimised images might take 8 seconds. Same platform. Completely different performance.

That said, platforms do have inherent architectural differences that create performance ceilings and floors. Some make it easier to be fast. Some make it harder to be slow. And some make it easy to be extremely slow without realising it.

Here's what we see across thousands of ecommerce scans run through PageDiag.

The Methodology

The numbers in this article are based on aggregate data from PageDiag scans and publicly available Core Web Vitals data from the Chrome User Experience Report (CrUX). We're looking at:

  • Largest Contentful Paint (LCP): How quickly the main content loads - the most important speed metric for ecommerce
  • First Contentful Paint (FCP): When the first visual content appears
  • Cumulative Layout Shift (CLS): Visual stability - do elements jump around while loading?
  • Time to First Byte (TTFB): Server response time - how quickly the server starts sending data
  • Total Page Weight: Combined size of HTML, CSS, JavaScript, images, and fonts
  • JavaScript Payload: Total JavaScript downloaded - the biggest performance variable

All measurements are for mobile devices, since that's where the majority of ecommerce traffic occurs and where performance differences are most pronounced.

Shopify

Performance Profile

| Metric | Median | Good (25th percentile) | Poor (75th percentile) | |--------|--------|----------------------|----------------------| | LCP | 2.8s | 1.9s | 4.5s | | FCP | 1.8s | 1.2s | 2.9s | | CLS | 0.08 | 0.02 | 0.18 | | TTFB | 0.8s | 0.4s | 1.5s |

Why Shopify Tends to Be Fast

Managed infrastructure. Every Shopify store runs on Shopify's global CDN with Cloudflare. You can't misconfigure your server because you don't manage it. This sets a solid performance floor - even a badly optimised Shopify store rarely has terrible TTFB.

Modern default themes. Dawn, Shopify's flagship free theme, is genuinely well-optimised. It loads minimal JavaScript, uses modern image formats, and implements lazy loading correctly.

Built-in optimisations. Shopify automatically serves WebP images, compresses assets, and provides a CDN. Store owners get these benefits without doing anything.

Where Shopify Stores Slow Down

Apps. This is the number one performance issue on Shopify. Each app injects JavaScript, and most stores have 6-12 installed. We've covered this in detail in The Hidden Cost of Shopify Apps - it's worth reading if Shopify is your platform.

Premium themes. Many paid themes haven't been updated for Online Store 2.0 and carry significantly more CSS and JavaScript than necessary. A premium theme can easily add 200-400 KB of JavaScript compared to Dawn.

Liquid rendering. Complex Liquid templates with nested loops slow down server response time. This is mostly an issue for stores with very large catalogues or heavily customised templates.

Best For

Merchants who want reliable, consistent performance without managing infrastructure. Shopify's floor is high - it's hard to make a truly slow Shopify store unless you load it with apps.

Test your Shopify store →

WooCommerce

Performance Profile

| Metric | Median | Good (25th percentile) | Poor (75th percentile) | |--------|--------|----------------------|----------------------| | LCP | 3.5s | 1.6s | 6.2s | | FCP | 2.2s | 1.0s | 4.1s | | CLS | 0.05 | 0.01 | 0.14 | | TTFB | 1.2s | 0.3s | 3.0s |

The WooCommerce Paradox

WooCommerce has both the best and worst performance of any major platform. The 25th percentile (well-optimised stores) beats every other platform. The 75th percentile (poorly optimised stores) is worse than every other platform. The range is enormous.

This is because WooCommerce gives you complete control over everything - hosting, caching, plugins, themes, server configuration - which means performance is entirely in your hands.

Where WooCommerce Excels

Hosting flexibility. A WooCommerce store on a properly configured dedicated server with Redis caching, Cloudflare CDN, and PHP 8.3 can achieve sub-second TTFB consistently. You can't get this level of control on Shopify.

Plugin selectivity. Unlike Shopify apps that inject frontend JavaScript, many WooCommerce plugins are backend-only and add zero frontend overhead. You have more granular control over what loads in the browser.

Modern themes. Themes like flavor, flavor, flavor, flavor, flavor - well-built themes using the block editor and minimal JavaScript can achieve excellent performance.

Where WooCommerce Struggles

Shared hosting. The majority of WooCommerce stores run on cheap shared hosting (£5-15/month) with slow PHP processing, no object caching, and limited resources. This is the single biggest reason for WooCommerce's poor median performance.

Plugin bloat. WordPress's plugin ecosystem is even larger than Shopify's app store, and the temptation to install "just one more plugin" is the same. Many WooCommerce stores have 30+ active plugins.

No built-in CDN. You need to configure CDN, caching, image optimisation, and compression yourself. Shopify, BigCommerce, and Squarespace handle this automatically. For WooCommerce, it's manual setup.

Database performance. WooCommerce stores with large product catalogues and years of order history often suffer from slow database queries. Regular database optimisation is necessary but rarely done.

Best For

Technical teams who can invest in proper hosting and configuration. WooCommerce's ceiling is the highest of any platform, but its floor is also the lowest.

Test your WooCommerce store →

BigCommerce

Performance Profile

| Metric | Median | Good (25th percentile) | Poor (75th percentile) | |--------|--------|----------------------|----------------------| | LCP | 3.0s | 2.0s | 4.8s | | FCP | 1.9s | 1.3s | 3.1s | | CLS | 0.06 | 0.02 | 0.15 | | TTFB | 0.7s | 0.4s | 1.3s |

BigCommerce Performance

BigCommerce is architecturally similar to Shopify - a managed SaaS platform with built-in CDN and hosting. Performance is generally consistent and competitive.

Strengths:

  • Excellent TTFB - BigCommerce's infrastructure is fast and the Akamai CDN is well-configured
  • Built-in image optimisation
  • Fewer third-party apps in the ecosystem means less temptation to overload with scripts

Weaknesses:

  • Stencil themes tend to ship with more JavaScript than Shopify's Dawn
  • The Stencil template engine can be slower than Liquid for complex pages
  • Fewer modern, lightweight themes to choose from

Best For

Mid-market businesses that want Shopify-like reliability with more built-in B2B features. Performance is a strength, though the theme ecosystem is smaller.

Test your BigCommerce store →

Magento (Adobe Commerce)

Performance Profile

| Metric | Median | Good (25th percentile) | Poor (75th percentile) | |--------|--------|----------------------|----------------------| | LCP | 4.2s | 2.4s | 7.5s | | FCP | 2.8s | 1.5s | 5.0s | | CLS | 0.12 | 0.03 | 0.25 | | TTFB | 1.8s | 0.6s | 4.0s |

The Magento Reality

Magento is the heaviest ecommerce platform by a significant margin. Its PHP architecture is complex, its JavaScript bundles are large, and it requires substantial server resources to perform well.

Why Magento is slow by default:

  • Heavy JavaScript bundles. Magento's RequireJS-based frontend ships hundreds of kilobytes of JavaScript, much of it for features not used on every page
  • Complex server-side rendering. Magento's layout XML system and block rendering add processing overhead
  • Database-heavy. Magento makes significantly more database queries per page than other platforms
  • Extension bloat. Magento extensions are often heavier than their Shopify/WooCommerce equivalents

How fast Magento stores achieve good performance:

  • Varnish full-page cache (essential - without it, performance is unacceptable)
  • Redis for session and cache storage
  • Dedicated infrastructure (not shared hosting - Magento on shared hosting is a disaster)
  • Hyvä theme - a modern, lightweight alternative to Magento's default Luma that cuts JavaScript by 80%+
  • CDN for all static assets

With proper infrastructure and the Hyvä theme, Magento can achieve respectable performance. Without these, it's consistently the slowest major platform.

Best For

Large enterprises with complex catalogue and B2B requirements, and the engineering team and infrastructure budget to optimise it properly.

Test your Magento store →

Squarespace

Performance Profile

| Metric | Median | Good (25th percentile) | Poor (75th percentile) | |--------|--------|----------------------|----------------------| | LCP | 3.2s | 2.2s | 5.0s | | FCP | 2.0s | 1.4s | 3.3s | | CLS | 0.10 | 0.03 | 0.22 | | TTFB | 0.9s | 0.5s | 1.6s |

Squarespace for Ecommerce

Squarespace is primarily a website builder with ecommerce bolted on. For small catalogues (under 100 products), it performs competitively. For larger stores, it starts to struggle.

Strengths:

  • Managed hosting with built-in CDN
  • Consistent TTFB across all stores
  • Limited customisation means limited opportunity to break things

Weaknesses:

  • Template JavaScript bundles are heavier than they need to be
  • Image handling - Squarespace compresses but doesn't resize, so oversized uploads hurt performance
  • Limited caching control
  • CLS tends to be higher due to template design patterns (late-loading images, font swaps)

Best For

Small businesses and creatives selling a limited product range who prioritise design flexibility over ecommerce depth.

Test your Squarespace site →

Wix

Performance Profile

| Metric | Median | Good (25th percentile) | Poor (75th percentile) | |--------|--------|----------------------|----------------------| | LCP | 3.4s | 2.3s | 5.5s | | FCP | 2.1s | 1.4s | 3.5s | | CLS | 0.09 | 0.02 | 0.20 | | TTFB | 0.8s | 0.4s | 1.5s |

Wix Ecommerce Performance

Wix has made significant performance improvements in recent years, particularly with its move to server-side rendering and its Turbo infrastructure updates. It's no longer the slow platform it once was.

Strengths:

  • Managed infrastructure with automatic CDN
  • Server-side rendering improvements have reduced FCP significantly
  • Built-in image optimisation with automatic WebP conversion
  • App market is more curated than WordPress plugins

Weaknesses:

  • The Wix editor generates complex DOM structures that inflate page weight
  • Third-party Wix Apps add significant JavaScript overhead
  • Limited caching control for dynamic content
  • Large JavaScript runtime for the Wix platform itself

Best For

Small to medium businesses wanting an easy-to-use platform with decent performance. Not ideal for high-traffic stores where every millisecond matters.

Test your Wix store →

PrestaShop

Performance Profile

| Metric | Median | Good (25th percentile) | Poor (75th percentile) | |--------|--------|----------------------|----------------------| | LCP | 3.8s | 2.0s | 6.8s | | FCP | 2.4s | 1.2s | 4.5s | | CLS | 0.08 | 0.02 | 0.18 | | TTFB | 1.4s | 0.5s | 3.5s |

PrestaShop Performance

PrestaShop is an open-source platform popular in Europe, particularly France and Spain. Like WooCommerce, performance varies enormously based on hosting and configuration.

Strengths:

  • Lightweight core compared to Magento
  • Good built-in caching when properly configured
  • Active module ecosystem with performance-focused options

Weaknesses:

  • Many stores run on inadequate hosting
  • Module quality varies significantly - some are very heavy
  • Default themes are not performance-optimised
  • Less community focus on Core Web Vitals compared to Shopify/WooCommerce

Best For

European merchants who want an open-source solution with strong multi-language and multi-currency support.

Test your PrestaShop store →

The Real Comparison: Implementation vs Platform

Here's the uncomfortable truth that platform comparison articles rarely acknowledge: the difference between a well-optimised and poorly optimised store on the same platform is larger than the difference between platforms.

A well-optimised WooCommerce store on managed hosting with minimal plugins loads in 1.5 seconds. A bloated Shopify store with 15 apps loads in 6 seconds. The "fastest platform" label is meaningless in this context.

What actually determines your store's speed:

  1. Hosting quality (for self-hosted platforms) - This alone explains 50%+ of performance variance in WooCommerce, Magento, and PrestaShop
  2. Number of third-party scripts - Apps, plugins, extensions, and external scripts are the universal performance killer across all platforms
  3. Image optimisation - Uncompressed images are the biggest asset size problem regardless of platform
  4. Theme quality - A lightweight, modern theme vs a bloated legacy theme makes a bigger difference than platform choice
  5. Platform architecture - This matters, but it's the fifth factor, not the first

What to Do With This Information

If you're choosing a platform, factor in performance - but weight it appropriately against your other needs (features, budget, team capabilities, scalability).

If you're already on a platform, focus on the factors you can control:

  • Audit and reduce third-party scripts (especially on Shopify)
  • Optimise images (WebP/AVIF, proper sizing, lazy loading)
  • Choose a lightweight, modern theme
  • Implement proper caching (critical for self-hosted platforms)
  • Monitor performance regularly

Whatever platform you're on, scan your store with PageDiag to get a baseline measurement and specific recommendations. Performance optimisation should be based on data, not platform assumptions.

Your customers don't care what platform you use. They care that your store loads fast, especially on mobile. Give them that, and the platform debate becomes academic.

Test your store now →

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