Performance
· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
1.66 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.78 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
23 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.000
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.13 s
Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.
3.31 s
Page Load Progression
FPage Weight BudgetAction3.2 MB transferred, 66 requestsFIX
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.
Source: web.dev
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
Source: web.dev
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS BundlesAction18 scripts, 908 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 0 KB | 177 KB (49%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 362 KB | 177 KB (49%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 362 KB | 177 KB (49%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-MLD3XV4L>m=4e64h1 | 161 KB | 87 KB (54%) | ✓ | 3rd |
| https://www.coca-cola.com/onexp-theme/a0a44e9273faa9d6b40f7e0ced094dab7c06c127eb83ca95124fe72946943e03/theme.js | 100 KB | 73 KB (73%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-NBWPCZW | 207 KB | 69 KB (33%) | ✓ | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202510.2.0/otBannerSdk.js | 124 KB | 66 KB (53%) | ✓ | 3rd |
| https://cdn.global.gcds.coke.com/emea/sdk/latest.js?v6 | 73 KB | 52 KB (72%) | ✓ | 3rd |
| https://www.coca-cola.com/etc.clientlibs/cep/clientlibs/clientlib-cwr.lc-085b194b52d77cc30f6cc60ab771e406-lc.min.js | 53 KB | 29 KB (56%) | ✓ | 3rd |
| https://www.coca-cola.com/etc.clientlibs/core/wcm/components/commons/datalayer/v2/clientlibs/core.wcm.components.commons.datalayer.v2.lc-1e0136bad0acfb78be509234578e44f9-lc.min.js | 1 KB | — | ✓ | 3rd |
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
FPage Weight InventoryAction66 resources · 3.2 MB · 908 KB savings availableFIX
~908.1 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 66 resources | 3.2 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization23 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
BJS Execution Cost946ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 191ms | 150ms | 25ms | 3rd |
| https://www.coca-cola.com/es/es | 169ms | 3ms | 1ms | 3rd |
| Unattributable | 161ms | 60ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-NBWPCZW | 142ms | 124ms | 16ms | 3rd |
| https://www.coca-cola.com/onexp-theme/a0a44e9273faa9d6b40f7e0ced094dab7c06c127eb83ca95124fe72946943e03/theme.js | 129ms | 3ms | 0ms | 3rd |
| https://www.coca-cola.com/onexp-theme/a0a44e9273faa9d6b40f7e0ced094dab7c06c127eb83ca95124fe72946943e03/splide.esm.js | 80ms | 22ms | 0ms | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202510.2.0/otBannerSdk.js | 74ms | 48ms | 13ms | 3rd |
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading4 fonts (175 KB)PASS
Web fonts
4
175 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
Optimization checklist
- Preload critical fonts (priority=high)
- Use woff2 format for all fonts
- Set font-display to swap, optional, or fallback
- Subset large fonts (≤100 KB each)
Fixing the unchecked items could save ~6 KB and ~12 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
Network Waterfall66 requests over 2019msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.gstatic.com www.gstatic.com | Other | 191ms | 0 KB | 49% | €2/mo | Optional |
www.coca-cola.com www.coca-cola.com | Other | 169ms | 22 KB | — | €2/mo | Optional |
Unattributable Unattributable | Other | 161ms | 0 KB | — | €2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 142ms | 207 KB | 33% | €2/mo | Optional |
www.coca-cola.com www.coca-cola.com | Other | 129ms | 100 KB | 73% | €1/mo | Optional |
www.coca-cola.com www.coca-cola.com | Other | 80ms | 17 KB | — | €1/mo | Optional |
OneTrust cdn.cookielaw.org | Consent | 74ms | 124 KB | 53% | €1/mo | Essential |
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.
Learn more ▾ ▴
Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.
Source: web.dev
73% of www.coca-cola.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
53% of OneTrust's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev