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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
89
GRADE
B
FIX
1
REVIEW
3
PASS
11
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
66
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
76
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

2.95 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

7.72 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

215 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.

3.36 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.

8.28 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
17
11 PASS 3 REVIEW 1 FIX
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

C
Image Optimization
Action
25 images, 0 KB saveable
REVIEW
25 images, 0 KB saveable
Warning::
https://kiwislot.co.nz/wp-content/webp-express/web... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://kiwislot.co.nz/wp-content/webp-express/web... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://kiwislot.co.nz/wp-content/webp-express/web... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://kiwislot.co.nz/static/img/general/cork-170... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://kiwislot.co.nz/static/img/general/cork-360... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.dmca.com/Badges/dmca-badge-w150-5x1... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://kiwislot.co.nz/wp-content/webp-express/web... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://kiwislot.co.nz/wp-content/webp-express/web... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://kiwislot.co.nz/wp-content/webp-express/web... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://kiwislot.co.nz/wp-content/webp-express/web... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
//:0 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://kiwislot.co.nz/static/img/general/cork.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
25 images 517 KB
0 oversized -0 KB
6 legacy format
12 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

C
JS Execution Cost
Action
1867ms total JS execution
REVIEW
1867ms total JS execution
Warning::
https://kiwislot.co.nz/: 589ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-RBCZ...: 507ms CPU time
Warning::
https://kiwislot.co.nz/static/js/all.js?ver=174282...: 350ms CPU time
Warning::
Unattributable: 284ms CPU time
Info::
https://kiwislot.co.nz/wp-content/plugins/webp-exp...: 137ms CPU time
Info::
Third-party scripts: 791ms (42% of total)

Main Thread Breakdown

Script Evaluation 37% Other 21% Style & Layout 21% Script Parsing & Compilation 13% Rendering 6%
ScriptTotalScriptingParse/CompileParty
https://kiwislot.co.nz/589ms9ms4ms1st
https://www.googletagmanager.com/gtag/js?id=G-RBCZXBH0WL507ms305ms196ms3rd
https://kiwislot.co.nz/static/js/all.js?ver=1742828382350ms273ms36ms1st
Unattributable284ms7ms0ms3rd
https://kiwislot.co.nz/wp-content/plugins/webp-express/js/lazysizes.min.js137ms82ms1ms1st
B
JS Bundles
9 scripts, 119 KB unused
REVIEW
9 scripts, 119 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-RBCZ...: 63 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://kiwislot.co.nz/static/js/all.js?ver=174282...: 56 KB unused (63%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 119 KB
119 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-RBCZXBH0WL144 KB63 KB (44%)✓3rd
https://kiwislot.co.nz/static/js/all.js?ver=174282838289 KB56 KB (63%)✓1st
https://images.dmca.com/Badges/DMCABadgeHelper.min.js1 KB—✓3rd
https://kiwislot.co.nz/wp-content/plugins/universal-banner-popup/resources/js/ajax.js?ver=1.01 KB—✓1st
https://kiwislot.co.nz/wp-content/plugins/webp-express/js/lazysizes.min.js4 KB—✓1st
https://kiwislot.co.nz/wp-content/plugins/wp-tt-second-offer-links/script.js?ver=1.2.41 KB—✓1st
https://kiwislot.co.nz/static/js/custom.js?ver=17428283825 KB—✓1st
https://kiwislot.co.nz/static/js/user.js?ver=17428283821 KB—✓1st
https://static.cloudflareinsights.com/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da177152312451611 KB—✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

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.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

A
Page Weight Budget
934 KB transferred, 46 requests
PASS
934 KB transferred, 46 requests
Info::
Page weighs 1.5 MB (934 KB transferred)
Info::
46 HTTP requests
Info::
Estimated 0.19 g CO2 per page load
934 KB / 2.4 MB budget
934 KB transferred
46 requests
0.19 g CO2 per page load
Images 516.6 KiB 55%
JavaScript 256.4 KiB 27%
Fonts 106.9 KiB 11%
CSS 34.0 KiB 4%
HTML 13.0 KiB 1%
Other 4.2 KiB 0%
Other 1.8 KiB 0%
Other 548 B 0%
0 2.4 MB 4.9 MB
Under budget
A
Third-Party Impact
29% third-party, 0 ms blocking
PASS
29% third-party, 0 ms blocking
Info::
Third-party code accounts for 29% of page weight (267.9 KiB of 933.5 KiB)
Info::
Third-party blocking time is low (0 ms)
71%
29%
First-party Third-party
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
5 fonts (107 KB)
PASS
5 fonts (107 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

107 KB total

Render-blocking

0

of 5

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s FCP 3.0 s LCP 7.7 shttps://fonts.gstatic.com/s/lato/v14/S6u9w4BMUTPHh7USSwiPGQ.woff2S6u9w4BMUTPHh7USSwiPGQ.... https://fonts.gstatic.com/s/lato/v14/S6u9w4BMUTPHh7USSwiPGQ.woff2 — 22.7 KiB — 37 ms — font-display: swaphttps://fonts.gstatic.com/s/lato/v14/S6uyw4BMUTPHjx4wXg.woff2S6uyw4BMUTPHjx4wXg.woff2 https://fonts.gstatic.com/s/lato/v14/S6uyw4BMUTPHjx4wXg.woff2 — 22.8 KiB — 27 ms — font-display: swaphttps://fonts.gstatic.com/s/lato/v14/S6u9w4BMUTPHh6UVSwiPGQ.woff2S6u9w4BMUTPHh6UVSwiPGQ.... https://fonts.gstatic.com/s/lato/v14/S6u9w4BMUTPHh6UVSwiPGQ.woff2 — 22.3 KiB — 35 ms — font-display: swaphttps://fonts.gstatic.com/s/arsenal/v3/wXKrE3kQtZQ4pF3D51jcAA.woff2wXKrE3kQtZQ4pF3D51jcAA.... https://fonts.gstatic.com/s/arsenal/v3/wXKrE3kQtZQ4pF3D51jcAA.woff2 — 17.2 KiB — 36 ms — font-display: swaphttps://fonts.gstatic.com/s/lato/v14/S6u9w4BMUTPHh50XSwiPGQ.woff2S6u9w4BMUTPHh50XSwiPGQ.... https://fonts.gstatic.com/s/lato/v14/S6u9w4BMUTPHh50XSwiPGQ.woff2 — 21.9 KiB — 6 ms — font-display: swap
S6u9w4BMUTPHh7USSwiPGQ.... woff2 swap
Size 23 KB
Load time 37 ms
Start 726 ms
Risk FOUT — text flashes from fallback to web font
S6uyw4BMUTPHjx4wXg.woff2 woff2 swap
Size 23 KB
Load time 27 ms
Start 727 ms
Risk FOUT — text flashes from fallback to web font
S6u9w4BMUTPHh6UVSwiPGQ.... woff2 swap
Size 22 KB
Load time 35 ms
Start 727 ms
Risk FOUT — text flashes from fallback to web font
wXKrE3kQtZQ4pF3D51jcAA.... woff2 swap
Size 17 KB
Load time 36 ms
Start 727 ms
Risk FOUT — text flashes from fallback to web font
S6u9w4BMUTPHh50XSwiPGQ.... woff2 swap
Size 22 KB
Load time 6 ms
Start 868 ms
Risk FOUT — text flashes from fallback to web font
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)
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
9 hints, 0 missing preconnects
PASS
9 hints, 0 missing preconnects
Info::
Page uses 9 resource hint(s)

Current Resource Hints

preconnect
1
preload
7
dns-prefetch
1
prefetch
—

9 resource hints configured

A+
Page Weight Inventory
46 resources · 934 KB · 119 KB savings available
PASS
46 resources · 934 KB · 119 KB savings available
Info::
Within 1MB page-weight target
Got: 934 KB
Info::
~119 KB of savings available
Info::
16 third-party resources (29% of weight)
46 resources · 933.5 KiB · 16 third-party Within 1MB page-weight target
Image 56% · 520.8 KiB
JavaScript 27% · 256.4 KiB
Font 11% · 106.9 KiB
CSS 4% · 34.0 KiB
Document 1% · 13.0 KiB
Other 0% · 2.4 KiB

~119.3 KiB of savings available

Remove unused JavaScript: 119.3 KiB
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall
46 requests over 3246ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s FCP 3.0 s LCP 7.7 shttps://kiwislot.co.nz// https://kiwislot.co.nz/ — 200 — 13.0 KiB — 710 ms — h3https://www.googletagmanager.com/gtag/js?id=G-RBCZXBH0WLwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-RBCZXBH0WL — 200 — 144.0 KiB — 81 ms — h2https://fonts.gstatic.com/s/lato/v14/S6u9w4BMUTPHh7USSwiPGQ.woff2fonts.gstatic.com/s/lato/v14/S6u9w4... https://fonts.gstatic.com/s/lato/v14/S6u9w4BMUTPHh7USSwiPGQ.woff2 — 200 — 22.7 KiB — 37 ms — h3https://fonts.gstatic.com/s/lato/v14/S6uyw4BMUTPHjx4wXg.woff2fonts.gstatic.com/s/lato/v14/S6uyw4... https://fonts.gstatic.com/s/lato/v14/S6uyw4BMUTPHjx4wXg.woff2 — 200 — 22.8 KiB — 27 ms — h3https://fonts.gstatic.com/s/lato/v14/S6u9w4BMUTPHh6UVSwiPGQ.woff2fonts.gstatic.com/s/lato/v14/S6u9w4... https://fonts.gstatic.com/s/lato/v14/S6u9w4BMUTPHh6UVSwiPGQ.woff2 — 200 — 22.3 KiB — 35 ms — h3https://fonts.gstatic.com/s/arsenal/v3/wXKrE3kQtZQ4pF3D51jcAA.woff2fonts.gstatic.com/s/arsenal/v3/wXKr... https://fonts.gstatic.com/s/arsenal/v3/wXKrE3kQtZQ4pF3D51jcAA.woff2 — 200 — 17.2 KiB — 36 ms — h3https://kiwislot.co.nz/static/css/main.min.css?ver=1742828382/static/css/main.min.css?ver=174282... https://kiwislot.co.nz/static/css/main.min.css?ver=1742828382 — 200 — 31.4 KiB — 19 ms — h3https://kiwislot.co.nz/static/js/all.js?ver=1742828382/static/js/all.js?ver=1742828382 https://kiwislot.co.nz/static/js/all.js?ver=1742828382 — 200 — 89.4 KiB — 42 ms — h3https://kiwislot.co.nz/wp-content/plugins/universal-banner-popup/resources/css/main.min.css?ver=1.0/wp-content/plugins/universal-banne... https://kiwislot.co.nz/wp-content/plugins/universal-banner-popup/resources/css/main.min.css?ver=1.0 — 200 — 1.8 KiB — 15 ms — h3https://kiwislot.co.nz/wp-content/webp-express/webp-images/uploads/2020/01/logo.png.webp/wp-content/webp-express/webp-image... https://kiwislot.co.nz/wp-content/webp-express/webp-images/uploads/2020/01/logo.png.webp — 200 — 5.0 KiB — 329 ms — h3https://kiwislot.co.nz/static/img/general/cork-360-260.png/static/img/general/cork-360-260.pn... https://kiwislot.co.nz/static/img/general/cork-360-260.png — 200 — 2.1 KiB — 25 ms — h3https://images.dmca.com/Badges/DMCABadgeHelper.min.jsimages.dmca.com/Badges/DMCABadgeHel... https://images.dmca.com/Badges/DMCABadgeHelper.min.js — 200 — 804 B — 42 ms — h2https://kiwislot.co.nz/wp-content/plugins/universal-banner-popup/resources/js/ajax.js?ver=1.0/wp-content/plugins/universal-banne... https://kiwislot.co.nz/wp-content/plugins/universal-banner-popup/resources/js/ajax.js?ver=1.0 — 200 — 693 B — 343 ms — h3https://kiwislot.co.nz/wp-content/plugins/webp-express/js/lazysizes.min.js/wp-content/plugins/webp-express/js... https://kiwislot.co.nz/wp-content/plugins/webp-express/js/lazysizes.min.js — 200 — 3.9 KiB — 29 ms — h3https://kiwislot.co.nz/wp-content/plugins/wp-tt-second-offer-links/script.js?ver=1.2.4/wp-content/plugins/wp-tt-second-of... https://kiwislot.co.nz/wp-content/plugins/wp-tt-second-offer-links/script.js?ver=1.2.4 — 200 — 708 B — 17 ms — h3https://kiwislot.co.nz/static/js/custom.js?ver=1742828382/static/js/custom.js?ver=1742828382 https://kiwislot.co.nz/static/js/custom.js?ver=1742828382 — 200 — 4.7 KiB — 30 ms — h3https://kiwislot.co.nz/wp-content/plugins/wp-tt-rating-stars/static/css/rating.css?ver=5.2.3/wp-content/plugins/wp-tt-rating-st... https://kiwislot.co.nz/wp-content/plugins/wp-tt-rating-stars/static/css/rating.css?ver=5.2.3 — 200 — 893 B — 30 ms — h3https://kiwislot.co.nz/wp-content/webp-express/webp-images/uploads/2020/01/banner-bonus-decor-left.png.webp/wp-content/webp-express/webp-image... https://kiwislot.co.nz/wp-content/webp-express/webp-images/uploads/2020/01/banner-bonus-decor-left.png.webp — 200 — 6.1 KiB — 356 ms — h3https://kiwislot.co.nz/wp-content/webp-express/webp-images/uploads/2020/01/banner-bonus-decor-right.png.webp/wp-content/webp-express/webp-image... https://kiwislot.co.nz/wp-content/webp-express/webp-images/uploads/2020/01/banner-bonus-decor-right.png.webp — 200 — 3.9 KiB — 357 ms — h3https://kiwislot.co.nz/static/img/general/cork-170-103.png/static/img/general/cork-170-103.pn... https://kiwislot.co.nz/static/img/general/cork-170-103.png — 200 — 1.6 KiB — 32 ms — h3https://kiwislot.co.nz/static/img/general/cork.png/static/img/general/cork.png https://kiwislot.co.nz/static/img/general/cork.png — 200 — 15.0 KiB — 30 ms — h3https://images.dmca.com/Badges/dmca-badge-w150-5x1-06.png?ID=0c8308ec-f0e8-4387-a317-aa400a570da4images.dmca.com/Badges/dmca-badge-w... https://images.dmca.com/Badges/dmca-badge-w150-5x1-06.png?ID=0c8308ec-f0e8-4387-a317-aa400a570da4 — 200 — 5.0 KiB — 40 ms — h2https://kiwislot.co.nz/static/js/user.js?ver=1742828382/static/js/user.js?ver=1742828382 https://kiwislot.co.nz/static/js/user.js?ver=1742828382 — 200 — 1.4 KiB — 29 ms — h3https://static.cloudflareinsights.com/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da1771523124516static.cloudflareinsights.com/beaco... https://static.cloudflareinsights.com/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da1771523124516 — 200 — 10.7 KiB — 43 ms — h2https://kiwislot.co.nz// https://kiwislot.co.nz/ — 200 — 77.9 KiB — 646 ms — h3data:image/svg+xml,%3C%3Fxml version='1.0' encoding='iso-8859-1'%3F%3E%3C!DOCTYPE svg PUBLIC '-//W3…data:image/svg+xml,%3C%3Fxml versio... data:image/svg+xml,%3C%3Fxml version='1.0' encoding='iso-8859-1'%3F%3E%3C!DOCTYPE svg PUBLIC '-//W3… — 200 — 0 B — 0 ms — datadata:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 512 512'%3E%3Cpath d='M51…www.w3.org/2000/svg' viewBox='0 0 5... data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 512 512'%3E%3Cpath d='M51… — 200 — 0 B — 0 ms — datahttps://kiwislot.co.nz/wp-content/uploads/2020/04/bn-1-1.webp/wp-content/uploads/2020/04/bn-1-1.... https://kiwislot.co.nz/wp-content/uploads/2020/04/bn-1-1.webp — 200 — 91.4 KiB — 365 ms — h3https://kiwislot.co.nz/wp-content/uploads/2020/04/bn-3.webp/wp-content/uploads/2020/04/bn-3.we... https://kiwislot.co.nz/wp-content/uploads/2020/04/bn-3.webp — 200 — 82.2 KiB — 333 ms — h3https://kiwislot.co.nz/wp-content/uploads/2020/04/bn-4.webp/wp-content/uploads/2020/04/bn-4.we... https://kiwislot.co.nz/wp-content/uploads/2020/04/bn-4.webp — 200 — 107.1 KiB — 362 ms — h3
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s FCP 3.0 s LCP 7.7 shttps://kiwislot.co.nz// https://kiwislot.co.nz/ — 200 — 13.0 KiB — 710 ms — h3https://www.googletagmanager.com/gtag/js?id=G-RBCZXBH0WLwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-RBCZXBH0WL — 200 — 144.0 KiB — 81 ms — h2https://fonts.gstatic.com/s/lato/v14/S6u9w4BMUTPHh7USSwiPGQ.woff2fonts.gstatic.com/s/lato/v14/S6u9w4... https://fonts.gstatic.com/s/lato/v14/S6u9w4BMUTPHh7USSwiPGQ.woff2 — 200 — 22.7 KiB — 37 ms — h3https://fonts.gstatic.com/s/lato/v14/S6uyw4BMUTPHjx4wXg.woff2fonts.gstatic.com/s/lato/v14/S6uyw4... https://fonts.gstatic.com/s/lato/v14/S6uyw4BMUTPHjx4wXg.woff2 — 200 — 22.8 KiB — 27 ms — h3https://fonts.gstatic.com/s/lato/v14/S6u9w4BMUTPHh6UVSwiPGQ.woff2fonts.gstatic.com/s/lato/v14/S6u9w4... https://fonts.gstatic.com/s/lato/v14/S6u9w4BMUTPHh6UVSwiPGQ.woff2 — 200 — 22.3 KiB — 35 ms — 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HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
42% of JavaScript execution is third-party
First-party Third-party 791ms · 144KB · NZ$23/mo
Google Tag Manager
Tag Manager
Costly
Execution 507ms
Transfer 144 KB
Unused 44%
Monthly Cost NZ$15/mo
Unattributable
Other
Costly
Execution 284ms
Transfer 0 KB
Monthly Cost NZ$8/mo

These scripts may cost more than they're worth

  • Google Tag Manager adds 507ms and costs ~NZ$15/month
  • Unattributable adds 284ms and costs ~NZ$8/month

42% of JavaScript execution time comes from third-party scripts.

Why this matters

Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.

Learn more ▾

Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.

Source: web.dev / HTTP Archive Web Almanac

Google Tag Manager takes 507ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Unattributable takes 284ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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