Performance checklist
Magento Checkout Performance Checklist
Use this when checkout feels slow, payment steps are unreliable, or frontend and backend latency are affecting conversion-critical journeys.
30-minute call | senior technical lead | no sales handoff
Fit
Who this is for
- Teams seeing slow checkout, cart delays, payment friction, or frontend bloat
- Stores preparing a Hyva/frontend performance programme
- Commercial owners who need performance work tied to conversion-critical paths
Signals
Warning signs
- Checkout initialisation takes seconds before customers can interact
- Payment methods load slowly, fail silently, or block the next checkout step
- Core Web Vitals look acceptable on generic pages but weak on high-intent journeys
Checklist
Practical checks to work through
Measure checkout TTFB, customer section load time, shipping-information, and payment-information calls
Profile quote table size, customer-data sections, payment method availability checks, and carrier API calls
Audit third-party scripts on checkout and defer anything not needed before interaction
Check cache, Varnish, Redis, OPcache, PHP-FPM, and database resource constraints
Test checkout on throttled mobile profiles, not only office desktop connections
Record before/after metrics and confirm no payment, shipping, or order regression after changes
Target state
What good looks like
- The checkout bottleneck is traced to a specific frontend, backend, integration, or infrastructure cause
- Performance fixes are validated against checkout and payment success, not only Lighthouse scores
- Release checks protect against new latency or JavaScript regressions
Watch-outs
Common risks
- Optimising category pages while checkout remains the actual conversion bottleneck
- Disabling scripts or payment modules without validating tracking and order capture
- Treating hosting changes as the answer before profiling Magento-specific causes
Escalate
When to ask for senior help
- Checkout speed or payment friction is affecting orders
- Performance issues span frontend, backend, hosting, and extensions
- You need a safe Hyva or checkout remediation plan with before/after validation
Senior Magento review
Need a senior engineer to review the risk?
Share the blocker, affected area, urgency, and any useful logs or screenshots. We will help you identify the safest next step.
30-minute call | senior technical lead | no sales handoff