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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
72
GRADE
C
FIX
5
REVIEW
2
PASS
6
INFO
2

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

Mobile Desktop
89
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
79
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.
82
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.

1.10 s

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

1.36 s

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

16 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.006

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

2.27 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.

3.12 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
15
6 PASS 2 REVIEW 5 FIX
F
Page Weight Budget
Action
2.7 MB transferred, 66 requests
FIX
2.7 MB transferred, 66 requests
Warning::
Page weighs 6.2 MB (2.7 MB transferred)
Warning::
JavaScript is 1.2 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.2 MB
Info::
Fonts are 870 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 870 KB
Info::
CSS is 253 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 253 KB
Info::
66 HTTP requests
Info::
Estimated 0.57 g CO2 per page load
2.7 MB / 2.4 MB budget
2.7 MB transferred
66 requests
0.57 g CO2 per page load
JavaScript 1.2 MiB 44%
Fonts 869.5 KiB 31%
Images 368.3 KiB 13%
CSS 253.3 KiB 9%
HTML 57.3 KiB 2%
Other 5.6 KiB 0%
Other 2.6 KiB 0%
Other 614 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Why this matters

CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.

Source: web.dev

D
Third-Party Impact
Action
76% third-party, 0 ms blocking
FIX
76% third-party, 0 ms blocking
Warning::
Third-party code accounts for 76% of page weight (2.1 MiB of 2.7 MiB)
Info::
Third-party blocking time is low (0 ms)
24%
76%
First-party Third-party
F
JS Bundles
Action
13 scripts, 521 KB unused
FIX
13 scripts, 521 KB unused
Warning::
https://static1.smartbear.co/smartbear/react/searc...: 80 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-5JK...: 76 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-BB2B...: 71 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-MHRZ...: 69 KB unused (39%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googleoptimize.com/optimize.js?id=GTM-...: 66 KB unused (61%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 521 KB
521 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://static1.smartbear.co/smartbear/react/search/search.js?t=0.1833528121125214165 KB80 KB (49%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-5JKCFZ&gtm=4e64k1154 KB76 KB (49%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-BB2BQ52LHM&cx=c&gtm=4e64k1176 KB71 KB (40%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-MHRZ11T9PF&cx=c&gtm=4e64k1178 KB69 KB (39%)✓3rd
https://www.googleoptimize.com/optimize.js?id=GTM-PL25XRT109 KB66 KB (61%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-PFFSBW3189 KB63 KB (33%)✓3rd
https://cdn-4.convertexperiments.com/js/1004798-1004841.js101 KB62 KB (61%)✓3rd
https://swagger.io/swagger/assets/js/scripts.min.js?t=20250114120945 KB34 KB (76%)✓1st
https://swagger.io/WebResource.axd?d=pynGkmcFUV13He1Qd6_TZOdU87Vq9F7UfOHKvD2a2g5-xrU0dLjIYe1erbV67uG4-xKxjw2&t=6385625617178966226 KB—✓1st
https://cdn.cookiehub.eu/c2/28d45b26.js37 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

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

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

F
Page Weight Inventory
Action
66 resources · 2.7 MB · 521 KB savings available
FIX
66 resources · 2.7 MB · 521 KB savings available
Warning::
Page weight 1.7 MB over 1MB target
Got: 2.7 MB Expected: ≤ 1 MB
Info::
~521 KB of savings available
Warning::
45 third-party resources (76% of weight)
Info::
1 resources over 200KB
66 resources · 2.7 MiB · 45 third-party 1.7 MiB over 1MB target
JavaScript 44% · 1.2 MiB
Font 31% · 869.5 KiB
Image 13% · 370.3 KiB
CSS 9% · 253.3 KiB
Document 2% · 57.9 KiB
Other 0% · 6.2 KiB

~521.2 KiB of savings available

Remove unused JavaScript: 521.2 KiB
D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: no-cache, no-store, must-revalidate
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

no-cache, no-store, must-revalidate

DirectiveValueMeaning
no-cache—Cache but always revalidate first
no-store—Never cache this response
must-revalidate—Must recheck with server after expiry
C
Image Optimization
Action
28 images, 0 KB saveable
REVIEW
28 images, 0 KB saveable
Warning::
https://static1.smartbear.co/swagger/media/images/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://imagedelivery.net/PVooPtpJE-25QaNkbEuXvw/0... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://static1.smartbear.co/swagger/media/images/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://static1.smartbear.co/swagger/media/images/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://static1.smartbear.co/swagger/media/images/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://static1.smartbear.co/swagger/media/images/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
28 images 368 KB
0 oversized -0 KB
27 legacy format
6 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

B
JS Execution Cost
676ms total JS execution
REVIEW
676ms total JS execution
Info::
https://swagger.io/: 168ms CPU time
Info::
Unattributable: 117ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-PFF...: 91ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-5JK...: 76ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-MHRZ...: 63ms CPU time
Warning::
Third-party scripts: 454ms (67% of total)

Main Thread Breakdown

Script Evaluation 49% Other 20% Style & Layout 13% Script Parsing & Compilation 9% Rendering 3% Parse HTML & CSS 3%
ScriptTotalScriptingParse/CompileParty
https://swagger.io/168ms22ms1ms1st
Unattributable117ms2ms0ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-PFFSBW391ms74ms12ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-5JKCFZ&gtm=4e64k176ms55ms9ms3rd
https://www.googletagmanager.com/gtag/js?id=G-MHRZ11T9PF&cx=c&gtm=4e64k163ms52ms10ms3rd
https://www.googletagmanager.com/gtag/js?id=G-BB2BQ52LHM&cx=c&gtm=4e64k154ms44ms10ms3rd
https://swagger.io/swagger/assets/js/scripts.min.js?t=20250114120954ms8ms2ms1st
https://static1.smartbear.co/smartbear/react/search/search.js?t=0.183352812112521452ms37ms11ms3rd
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
10 fonts (870 KB)
PASS
10 fonts (870 KB)
Info::
10 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

10

870 KB total

Render-blocking

0

of 10

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s FCP 1.1 s LCP 1.4 shttps://fonts.googleapis.com/css2?family=Monda:wght@400;700&family=Open+Sans:ital,wght@0,400;0,500;0,600;0,700;1,300;1,400&family=Roboto:wght@300;400;500;700&display=swapcss2 https://fonts.googleapis.com/css2?family=Monda:wght@400;700&family=Open+Sans:ital,wght@0,400;0,500;0,600;0,700;1,300;1,400&family=Roboto:wght@300;400;500;700&display=swap — 3.0 KiB — 96 ms — font-display: swaphttps://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2memvYaGs126MiZpBA-UvWbX... https://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2 — 42.0 KiB — 76 ms — font-display: swaphttps://swagger.io/swagger/assets/webfonts/fa-light-300.woff2fa-light-300.woff2 https://swagger.io/swagger/assets/webfonts/fa-light-300.woff2 — 115.5 KiB — 69 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 36.7 KiB — 84 ms — font-display: swaphttps://swagger.io/swagger/assets/webfonts/fa-regular-400.woff2fa-regular-400.woff2 https://swagger.io/swagger/assets/webfonts/fa-regular-400.woff2 — 107.8 KiB — 87 ms — font-display: swaphttps://swagger.io/swagger/assets/webfonts/fa-solid-900.woff2fa-solid-900.woff2 https://swagger.io/swagger/assets/webfonts/fa-solid-900.woff2 — 90.0 KiB — 87 ms — font-display: swaphttps://fonts.gstatic.com/s/opensans/v44/memtYaGs126MiZpBA-UFUIcVXSCEkx2cmqvXlWqWuU6FxZCJgg.woff2memtYaGs126MiZpBA-UFUIc... https://fonts.gstatic.com/s/opensans/v44/memtYaGs126MiZpBA-UFUIcVXSCEkx2cmqvXlWqWuU6FxZCJgg.woff2 — 44.0 KiB — 84 ms — font-display: swaphttps://pro.fontawesome.com/releases/v5.9.0/webfonts/fa-regular-400.woff2fa-regular-400.woff2 https://pro.fontawesome.com/releases/v5.9.0/webfonts/fa-regular-400.woff2 — 148.9 KiB — 70 ms — font-display: swaphttps://pro.fontawesome.com/releases/v5.9.0/webfonts/fa-solid-900.woff2fa-solid-900.woff2 https://pro.fontawesome.com/releases/v5.9.0/webfonts/fa-solid-900.woff2 — 120.6 KiB — 70 ms — font-display: swaphttps://pro.fontawesome.com/releases/v5.9.0/webfonts/fa-light-300.woff2fa-light-300.woff2 https://pro.fontawesome.com/releases/v5.9.0/webfonts/fa-light-300.woff2 — 161.1 KiB — 78 ms — font-display: swap
css2 unknown swap
Size 3 KB
Load time 96 ms
Start 264 ms
Risk FOUT — text flashes from fallback to web font
memvYaGs126MiZpBA-UvWbX... woff2 swap
Size 42 KB
Load time 76 ms
Start 614 ms
Risk FOUT — text flashes from fallback to web font
fa-light-300.woff2 woff2 swap
Size 116 KB
Load time 69 ms
Start 615 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 37 KB
Load time 84 ms
Start 615 ms
Risk FOUT — text flashes from fallback to web font
fa-regular-400.woff2 woff2 swap
Size 108 KB
Load time 87 ms
Start 615 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
fa-solid-900.woff2 woff2 swap
Size 90 KB
Load time 87 ms
Start 615 ms
Risk FOUT — text flashes from fallback to web font
memtYaGs126MiZpBA-UFUIc... woff2 swap
Size 44 KB
Load time 84 ms
Start 615 ms
Risk FOUT — text flashes from fallback to web font
fa-regular-400.woff2 woff2 swap
Size 149 KB
Load time 70 ms
Start 1.4 s
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
fa-solid-900.woff2 woff2 swap
Size 121 KB
Load time 70 ms
Start 1.4 s
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
fa-light-300.woff2 woff2 swap
Size 161 KB
Load time 78 ms
Start 1.4 s
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
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 ~328 KB and ~656 ms

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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
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
66 requests over 1974ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 1.1 s LCP 1.4 shttps://swagger.io// https://swagger.io/ — 200 — 57.3 KiB — 269 ms — h2https://www.googleoptimize.com/optimize.js?id=GTM-PL25XRTwww.googleoptimize.com/optimize.js?... https://www.googleoptimize.com/optimize.js?id=GTM-PL25XRT — 200 — 109.1 KiB — 156 ms — h2https://swagger.io/swagger/assets/css/stylesheet.min.css?t=202501141209/swagger/assets/css/stylesheet.min.... https://swagger.io/swagger/assets/css/stylesheet.min.css?t=202501141209 — 200 — 224.3 KiB — 59 ms — h2https://fonts.googleapis.com/css2?family=Monda:wght@400;700&family=Open+Sans:ital,wght@0,400;0,500;0,600;0,700;1,300;1,400&family=Roboto:wght@300;400;500;700&display=swapfonts.googleapis.com/css2?family=Mo... https://fonts.googleapis.com/css2?family=Monda:wght@400;700&family=Open+Sans:ital,wght@0,400;0,500;0,600;0,700;1,300;1,400&family=Roboto:wght@300;400;500;700&display=swap — 200 — 3.0 KiB — 96 ms — h2https://code.jquery.com/jquery-3.3.1.min.jscode.jquery.com/jquery-3.3.1.min.js https://code.jquery.com/jquery-3.3.1.min.js — 200 — 29.9 KiB — 44 ms — h2https://cdn.jsdelivr.net/npm/vanilla-lazyload@8.17.0/dist/lazyload.min.jscdn.jsdelivr.net/npm/vanilla-lazylo... https://cdn.jsdelivr.net/npm/vanilla-lazyload@8.17.0/dist/lazyload.min.js — 200 — 2.9 KiB — 13 ms — h2https://cdn-4.convertexperiments.com/js/1004798-1004841.jscdn-4.convertexperiments.com/js/100... https://cdn-4.convertexperiments.com/js/1004798-1004841.js — 200 — 101.2 KiB — 17 ms — h2https://swagger.io/WebResource.axd?d=pynGkmcFUV13He1Qd6_TZOdU87Vq9F7UfOHKvD2a2g5-xrU0dLjIYe1erbV67uG4-xKxjw2&t=638562561717896622/WebResource.axd?d=pynGkmcFUV13He1Q... https://swagger.io/WebResource.axd?d=pynGkmcFUV13He1Qd6_TZOdU87Vq9F7UfOHKvD2a2g5-xrU0dLjIYe1erbV67uG4-xKxjw2&t=638562561717896622 — 200 — 6.0 KiB — 145 ms — h2https://swagger.io/swagger/assets/images/SW_Menu1_1_CLR.svg/swagger/assets/images/SW_Menu1_1_C... https://swagger.io/swagger/assets/images/SW_Menu1_1_CLR.svg — 200 — 678 B — 53 ms — h2https://swagger.io/swagger/assets/images/SW_Menu1_2_CLR.svg/swagger/assets/images/SW_Menu1_2_C... https://swagger.io/swagger/assets/images/SW_Menu1_2_CLR.svg — 200 — 680 B — 53 ms — h2https://swagger.io/swagger/assets/images/SW_Menu1_3_CLR.svg/swagger/assets/images/SW_Menu1_3_C... https://swagger.io/swagger/assets/images/SW_Menu1_3_CLR.svg — 200 — 963 B — 33 ms — h3https://swagger.io/swagger/assets/images/SW_Menu1_4_CLR.svg/swagger/assets/images/SW_Menu1_4_C... https://swagger.io/swagger/assets/images/SW_Menu1_4_CLR.svg — 200 — 1.5 KiB — 32 ms — h3https://swagger.io/swagger/assets/images/SW_Menu1_5_CLR.svg/swagger/assets/images/SW_Menu1_5_C... https://swagger.io/swagger/assets/images/SW_Menu1_5_CLR.svg — 200 — 776 B — 28 ms — h3https://swagger.io/swagger/assets/js/scripts.min.js?t=202501141209/swagger/assets/js/scripts.min.js?t... https://swagger.io/swagger/assets/js/scripts.min.js?t=202501141209 — 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h2https://region1.google-analytics.com/g/collect?v=2&tid=G-BB2BQ52LHM&gtm=45je64k1v873269818z8895827058za20gzb895827058zd895827058&_p=1776900894889&gcs=G100&gcd=13p3pPp2p5l1&npa=1&dma_cps=-&dma=1&gdid=dMzY0Yz&_eu=AAAAAGA&are=1&cid=944583587.1776900895&frm=0&pscdl=denied&rcb=18&sr=800x600&uaa=x86&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&gaf=2&_s=1&tag_exp=0~115938466~115938468~117266400~117512543~118463262&dl=https%3A%2F%2Fswagger.io%2F&sid=1776900895&sct=1&seg=0&dt=API%20Documentation%20%26%20Design%20Tools%20for%20Teams%20%7C%20Swagger&en=page_view&_fv=1&_ss=1&ep.data_source=GTM-PFFSBW3&ep.user_agent_1=Mozilla%2F5.0%20(Macintosh%3B%20Intel%20Mac%20OS%20X%2010_15_7)%20AppleWebKit%2F537.36%20(KHTML%2C%20like%20Gecko)%20Chrome%2F147.0.&ep.user_agent_2=0.0%20Safari%2F537.36&tfd=977region1.google-analytics.com/g/coll... https://region1.google-analytics.com/g/collect?v=2&tid=G-BB2BQ52LHM&gtm=45je64k1v873269818z8895827058za20gzb895827058zd895827058&_p=1776900894889&gcs=G100&gcd=13p3pPp2p5l1&npa=1&dma_cps=-&dma=1&gdid=dMzY0Yz&_eu=AAAAAGA&are=1&cid=944583587.1776900895&frm=0&pscdl=denied&rcb=18&sr=800x600&uaa=x86&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&gaf=2&_s=1&tag_exp=0~115938466~115938468~117266400~117512543~118463262&dl=https%3A%2F%2Fswagger.io%2F&sid=1776900895&sct=1&seg=0&dt=API%20Documentation%20%26%20Design%20Tools%20for%20Teams%20%7C%20Swagger&en=page_view&_fv=1&_ss=1&ep.data_source=GTM-PFFSBW3&ep.user_agent_1=Mozilla%2F5.0%20(Macintosh%3B%20Intel%20Mac%20OS%20X%2010_15_7)%20AppleWebKit%2F537.36%20(KHTML%2C%20like%20Gecko)%20Chrome%2F147.0.&ep.user_agent_2=0.0%20Safari%2F537.36&tfd=977 — 204 — 48 B — 85 ms — h2https://cookiehub.net/regioncookiehub.net/region https://cookiehub.net/region — 200 — 0 B — 462 ms — h2https://www.google-analytics.com/analytics.jswww.google-analytics.com/analytics.... https://www.google-analytics.com/analytics.js — 200 — 20.9 KiB — 107 ms — h2https://pro.fontawesome.com/releases/v5.9.0/css/all.csspro.fontawesome.com/releases/v5.9.0... https://pro.fontawesome.com/releases/v5.9.0/css/all.css — 200 — 16.9 KiB — 79 ms — h2https://pro.fontawesome.com/releases/v5.9.0/webfonts/fa-regular-400.woff2pro.fontawesome.com/releases/v5.9.0... https://pro.fontawesome.com/releases/v5.9.0/webfonts/fa-regular-400.woff2 — 200 — 148.9 KiB — 70 ms — h2https://pro.fontawesome.com/releases/v5.9.0/webfonts/fa-solid-900.woff2pro.fontawesome.com/releases/v5.9.0... https://pro.fontawesome.com/releases/v5.9.0/webfonts/fa-solid-900.woff2 — 200 — 120.6 KiB — 70 ms — h2https://pro.fontawesome.com/releases/v5.9.0/webfonts/fa-light-300.woff2pro.fontawesome.com/releases/v5.9.0... https://pro.fontawesome.com/releases/v5.9.0/webfonts/fa-light-300.woff2 — 200 — 161.1 KiB — 78 ms — h2https://static1.smartbear.co/swagger/media/assets/swagger_fav.pngstatic1.smartbear.co/swagger/media/... https://static1.smartbear.co/swagger/media/assets/swagger_fav.png — 200 — 1.9 KiB — 18 ms — h2https://cookiehub.net/regioncookiehub.net/region https://cookiehub.net/region — 200 — 314 B — 248 ms — h2https://static1.smartbear.co/swagger/media/assets/swagger_fav.pngstatic1.smartbear.co/swagger/media/... https://static1.smartbear.co/swagger/media/assets/swagger_fav.png — 200 — 0 B — 1 ms — h2https://cookiehub.net/c2/css/28d45b26.csscookiehub.net/c2/css/28d45b26.css https://cookiehub.net/c2/css/28d45b26.css — 200 — 9.5 KiB — 184 ms — h2https://cookiehub.net/client/28d45b26/en.jsoncookiehub.net/client/28d45b26/en.js... https://cookiehub.net/client/28d45b26/en.json — 200 — 5.3 KiB — 64 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
67% of JavaScript execution is third-party
First-party Third-party 454ms · 862KB · $6/mo
Unattributable
Other
Optional
Execution 117ms
Transfer 0 KB
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Optional
Execution 91ms
Transfer 189 KB
Unused 33%
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 76ms
Transfer 154 KB
Unused 49%
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 63ms
Transfer 178 KB
Unused 39%
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 54ms
Transfer 176 KB
Unused 40%
Monthly Cost $1/mo
static1.smartbear.co
Other
Optional
Execution 52ms
Transfer 165 KB
Unused 49%
Monthly Cost $1/mo

67% 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

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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