Store speed matters when it helps customers see products, interact and complete orders. Start with real shopping pages and fix the largest measured obstacle. One test cannot represent every device and network, and a high score cannot compensate for broken checkout.
Choose pages that represent buying
Test the homepage, category, product, cart and checkout using a representative phone and network. Include first and repeat visits and products with different image counts. Record the URL, date and test settings.
Use Lighthouse for lab diagnosis and real-user data, when available, to understand experience over time. The two can differ because their measurement conditions differ.
Understand the metric before fixing it
Core Web Vitals cover main-content loading with LCP, interaction responsiveness with INP and visual stability with CLS. Published good thresholds are LCP up to 2.5 seconds, INP up to 200 milliseconds and CLS up to 0.1, assessed at the 75th percentile in field data.
Use them to prioritize. Identify the actual LCP resource rather than compressing every image indiscriminately, and investigate interaction work rather than hiding controls shoppers need.
The twelve checks
Scroll the table horizontally to see all columns.
| No. | Improvement | Verification |
|---|---|---|
| 1 | Right-sized images | Detail clarity and download size |
| 2 | Reserved image dimensions | No loading jumps |
| 3 | Main-image priority | Inspect actual LCP resource |
| 4 | Lazy loading below the fold | Do not delay the first image |
| 5 | Necessary fonts and weights | Readable Arabic rendering |
| 6 | Less unnecessary JavaScript | Responsive menus and variants |
| 7 | Review third-party scripts | Purpose and impact |
| 8 | Appropriate caching | Fresh price and stock |
| 9 | Usable touch targets | No overlap or accidental taps |
| 10 | Mobile checkout inputs | Appropriate keyboard and errors |
| 11 | No document overflow | Page fits the viewport |
| 12 | Post-release order test | Working purchase journey |
Use a test release and verify the whole flow
Make changes in a reversible release and rerun the same scenario. Preserve image clarity, readable text and usable variant controls. Compression that obscures product details is not a useful improvement.
Retest shipping, payment and confirmation after changing scripts. Delaying analytics can change reporting, while removing a functional script can prevent purchases. Identify a resource’s purpose before altering it.
Monitor after publication
Verify the deployed version and routes, then monitor page and checkout errors alongside speed. Field data needs time to accumulate; avoid attributing an immediate sales change to a single fix.
Appropriately sized imagery and clear catalog content support a Mollkom storefront. Merchant-dashboard performance and shopper-storefront performance serve different tasks, so evaluate each against its own workflow.
Common questions
Must every test score be 100?
Aim for a fast, working and measurable experience. Lab scores vary and do not guarantee checkout success or search rankings.
Should I remove all analytics?
Review each tool’s purpose and impact and choose an appropriate loading strategy. Reliable measurement helps evaluate the change itself.
Your next step
Continue with the store setup solution, or register and start your store. Apply the process to a small sample before expanding.
Sources and references
Information reviewed on 27 September 2026. Service availability and provider terms can change.