5
High
Performance
Verified by measurement
Heavy third-party script load
The homepage loads 63 scripts, which is the usual root cause of slow interaction readiness on mobile.
scroll ↕ — this is the live page
⚠ Heavy third-party script loadThe homepage loads 63 scripts (41 inline and 22 external) totaling 697 KB of HTML. This heavy script load delays interaction readiness, especially on …
Defer non-critical scriptsRemove duplicate pixelsPrioritize essential scripts
Homepage Performance
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FixAudit all third-party tags and remove any duplicated analytics or marketing pixels. Defer non-critical scripts so they load after the main content, and prioritize essential scripts to improve perceived performance. This reduces the initial load burden and speeds up interaction readiness, leading to a smoother user experience and higher conversion rates.
Evidence
Observed on the live site Verified by measurement
✓ Flagged independently by 1 of 7 analysts
- Measured on the live homepage: 41 inline and 22 external <script> tags, 697 KB of HTML.
Business case
If this change wins
$35,381 – $176,904
annual opportunity if it wins
Medium
Effort — 2-5 days
not testable at current traffic
A/B test duration
Prioritisation
PXL score: 5 / 10
| Question | Answer | Points |
|---|---|---|
| Is the change above the fold? | Yes | 1 |
| Is the change noticeable in under 5 seconds? | Yes | 2 |
| Does it add or remove an element? | Yes | 1 |
| Does it run on a high-traffic page? | No | 0 |
| Discovered via user testing? | No | 0 |
| Discovered via qualitative feedback (survey, support)? | No | 0 |
| Supported by heatmaps or session recordings? | No | 0 |
| Found via digital analytics or real-user field data? | No | 0 |
| Verified by direct technical measurement? | Yes | 1 |
Implementation
Hand this to your developer
- Surface
- Performance — SITE-WIDE PERFORMANCE
- Problem
- The homepage loads 63 scripts, which is the usual root cause of slow interaction readiness on mobile.
- Current state
- notes: 63 scripts, 697 KB HTML
- Change
- notes: Audit third-party tags, defer non-critical scripts, and remove duplicated analytics or marketing pixels.
- Acceptance criteria
- GIVEN a first-time visitor on the affected page
WHEN the change is live
THEN Audit third-party tags, defer non-critical scripts, and remove duplicated analytics or marketing pixels, with no regression at 375px and 1280px widths. - Tracking
- event: cro_heavy_third_party_script_load on interaction with the changed element; verify it fires in BOTH variants before opening traffic.
- Success metric
- conversion rate on the affected step
- QA checklist
- Chrome / Safari / Firefox · 375px + 1280px · keyboard reachable · screen-reader name present · no CLS introduced
- Effort
- Medium — 2-5 days
- Test plan
- 299,882 visitors per variant (95% significance, 80% power); not testable at current traffic.
- Rollback
- Feature-flag the change; revert the flag if the primary metric drops for 3 consecutive days.