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https://etherscan.io

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
73
GRADE
C
FIX
4
REVIEW
2
PASS
9
INFO
2

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

Mobile Desktop
29
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
86
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
77
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
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.

10.42 s

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

20.78 s

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

1.63 s

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.

10.42 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.

20.81 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
9 PASS 2 REVIEW 4 FIX
F
Page Weight Budget
Action
3.2 MB transferred, 59 requests
FIX
3.2 MB transferred, 59 requests
Warning::
Page weighs 7.6 MB (3.2 MB transferred)
Warning::
JavaScript is 1.6 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.6 MB
Info::
Fonts are 1.3 MB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 1.3 MB
Info::
59 HTTP requests
Info::
Estimated 0.67 g CO2 per page load
3.2 MB / 2.4 MB budget
3.2 MB transferred
59 requests
0.67 g CO2 per page load
JavaScript 1.6 MiB 50%
Fonts 1.3 MiB 41%
CSS 158.1 KiB 5%
Images 85.0 KiB 3%
HTML 22.2 KiB 1%
Other 14.1 KiB 0%
Other 4.3 KiB 0%
Other 2.1 KiB 0%
Other 546 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

F
JS Execution Cost
Action
4511ms total JS execution
FIX
4511ms total JS execution
Warning::
https://etherscan.io/assets/js/custom/web3.min.js?...: 837ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-T1JC...: 827ms CPU time
Warning::
Unattributable: 674ms CPU time
Warning::
https://etherscan.io/cdn-cgi/challenge-platform/sc...: 345ms CPU time
Warning::
https://etherscan.io/assets/vendor/jquery/dist/jqu...: 340ms CPU time
Info::
Third-party scripts: 1719ms (38% of total)

Main Thread Breakdown

Script Evaluation 53% Script Parsing & Compilation 17% Other 15% Style & Layout 8% Parse HTML & CSS 5%
ScriptTotalScriptingParse/CompileParty
https://etherscan.io/assets/js/custom/web3.min.js?v=26.4.3.2837ms619ms202ms1st
https://www.googletagmanager.com/gtag/js?id=G-T1JC9RNQXV827ms468ms73ms3rd
Unattributable674ms9ms0ms3rd
https://etherscan.io/cdn-cgi/challenge-platform/scripts/jsd/main.js345ms331ms4ms1st
https://etherscan.io/assets/vendor/jquery/dist/jquery.min.js?v=26.4.3.2340ms257ms12ms1st
https://etherscan.io/assets/vendor/walletlink_bundle.js?v=26.4.3.2293ms121ms171ms1st
https://etherscan.io/281ms79ms14ms1st
https://www.googletagmanager.com/gtag/js?id=UA-46998878-6&cx=c&gtm=4e64k0165ms118ms46ms3rd
https://etherscan.io/assets/js/custom/coinbase-wallet-sdk.js?v=26.4.3.2147ms85ms62ms1st
https://etherscan.io/assets/vendor/web3modal-1.9.8.min.js?v=26.4.3.2122ms62ms60ms1st

Showing top 10 of 16 scripts

F
JS Bundles
Action
25 scripts, 880 KB unused
FIX
25 scripts, 880 KB unused
Warning::
https://etherscan.io/assets/js/custom/web3.min.js?...: 217 KB unused (58%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://etherscan.io/assets/vendor/walletlink_bund...: 204 KB unused (68%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://etherscan.io/assets/vendor/walletlink_bund...: unminified — 88 KB could be saved
Warning::
https://etherscan.io/assets/js/custom/coinbase-wal...: 103 KB unused (76%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://etherscan.io/assets/vendor/jquery-ui/jquer...: 80 KB unused (89%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://etherscan.io/assets/vendor/web3modal-1.9.8...: 71 KB unused (35%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 880 KB
880 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://etherscan.io/assets/js/custom/web3.min.js?v=26.4.3.2378 KB217 KB (58%)✓1st
https://etherscan.io/assets/vendor/walletlink_bundle.js?v=26.4.3.2302 KB204 KB (68%)✗1st
https://etherscan.io/assets/js/custom/coinbase-wallet-sdk.js?v=26.4.3.2137 KB103 KB (76%)✓1st
https://etherscan.io/assets/vendor/jquery-ui/jquery-ui.min.js?v=26.4.3.289 KB80 KB (89%)✓1st
https://etherscan.io/assets/vendor/web3modal-1.9.8.min.js?v=26.4.3.2203 KB71 KB (35%)✓1st
https://www.googletagmanager.com/gtag/js?id=UA-46998878-6&cx=c&gtm=4e64k0116 KB65 KB (57%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-T1JC9RNQXV161 KB63 KB (39%)✓3rd
https://etherscan.io/assets/highcharts/v/highcharts.js?v=26.4.3.2101 KB53 KB (53%)✓1st
https://etherscan.io/assets/vendor/bootstrap/bootstrap.bundle.min.js?v=26.4.3.231 KB23 KB (77%)✓1st
https://etherscan.io/assets/js/custom/ether-search.js?v=26.4.3.213 KB—✗1st

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

D
Page Weight Inventory
Action
59 resources · 3.2 MB · 880 KB savings available
FIX
59 resources · 3.2 MB · 880 KB savings available
Warning::
Page weight 2.2 MB over 1MB target
Got: 3.2 MB Expected: ≤ 1 MB
Info::
~880 KB of savings available
Info::
13 third-party resources (10% of weight)
Info::
6 resources over 200KB
59 resources · 3.2 MiB · 13 third-party 2.2 MiB over 1MB target
JavaScript 50% · 1.6 MiB
Font 41% · 1.3 MiB
CSS 5% · 158.1 KiB
Image 3% · 88.4 KiB
Document 1% · 36.4 KiB
Other 0% · 2.8 KiB

~879.6 KiB of savings available

Remove unused JavaScript: 879.6 KiB
C
Image Optimization
Action
13 images, 0 KB saveable
REVIEW
13 images, 0 KB saveable
Warning::
https://etherscan.io/images/svg/brands/ethereum-or... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://etherscan.io/assets/svg/logos/logo-ethersc... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
13 images 85 KB
0 oversized -0 KB
10 legacy format
2 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

B
HTTP Caching
private
REVIEW
private
Info::
Cache-Control header is set
Got: private
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

private

DirectiveValueMeaning
private—Only browser cache, not CDN/proxy
A+
Third-Party Impact
10% third-party, 0 ms blocking
PASS
10% third-party, 0 ms blocking
Info::
Third-party code accounts for 10% of page weight (342.4 KiB of 3.2 MiB)
Info::
Third-party blocking time is low (0 ms)
90%
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 (1350 KB)
PASS
5 fonts (1350 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

1350 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 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s FCP 10.4 s LCP 20.8 shttps://etherscan.io/assets/vendor/font-awesome/webfonts/fa-regular-400.woff2fa-regular-400.woff2 https://etherscan.io/assets/vendor/font-awesome/webfonts/fa-regular-400.woff2 — 409.5 KiB — 128 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 36.7 KiB — 6 ms — font-display: swaphttps://etherscan.io/assets/vendor/font-awesome/webfonts/fa-light-300.woff2fa-light-300.woff2 https://etherscan.io/assets/vendor/font-awesome/webfonts/fa-light-300.woff2 — 447.7 KiB — 124 ms — font-display: swaphttps://etherscan.io/assets/vendor/font-awesome/webfonts/fa-brands-400.woff2fa-brands-400.woff2 https://etherscan.io/assets/vendor/font-awesome/webfonts/fa-brands-400.woff2 — 115.7 KiB — 56 ms — font-display: swaphttps://etherscan.io/assets/vendor/font-awesome/webfonts/fa-solid-900.woff2fa-solid-900.woff2 https://etherscan.io/assets/vendor/font-awesome/webfonts/fa-solid-900.woff2 — 340.2 KiB — 112 ms — font-display: swap
fa-regular-400.woff2 woff2 swap
Size 410 KB
Load time 128 ms
Start 777 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 6 ms
Start 779 ms
Risk FOUT — text flashes from fallback to web font
fa-light-300.woff2 woff2 swap
Size 448 KB
Load time 124 ms
Start 779 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-brands-400.woff2 woff2 swap
Size 116 KB
Load time 56 ms
Start 779 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 340 KB
Load time 112 ms
Start 780 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
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 ~657 KB and ~1314 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+
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
59 requests over 2151ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s FCP 10.4 s LCP 20.8 shttps://etherscan.io// https://etherscan.io/ — 200 — 22.2 KiB — 355 ms — h3https://www.googletagmanager.com/gtag/js?id=G-T1JC9RNQXVwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-T1JC9RNQXV — 200 — 161.0 KiB — 64 ms — h2https://fonts.googleapis.com/css2?family=Roboto:wght@400;500;700&display=swapfonts.googleapis.com/css2?family=Ro... https://fonts.googleapis.com/css2?family=Roboto:wght@400;500;700&display=swap — 200 — 2.1 KiB — 22 ms — h2https://etherscan.io/assets/vendor/font-awesome/css/all.min.css?v=26.4.3.2/assets/vendor/font-awesome/css/all... https://etherscan.io/assets/vendor/font-awesome/css/all.min.css?v=26.4.3.2 — 200 — 98.1 KiB — 51 ms — h3https://etherscan.io/assets/vendor/autocomplete/dist/css/autocomplete.min.css?v=26.4.3.2/assets/vendor/autocomplete/dist/cs... https://etherscan.io/assets/vendor/autocomplete/dist/css/autocomplete.min.css?v=26.4.3.2 — 200 — 1.7 KiB — 30 ms — h3https://etherscan.io/assets/css/theme.min.css?v=26.4.3.2/assets/css/theme.min.css?v=26.4.3.... https://etherscan.io/assets/css/theme.min.css?v=26.4.3.2 — 200 — 54.4 KiB — 53 ms — h3https://etherscan.io/assets/css/custom.css?v=26.4.3.2/assets/css/custom.css?v=26.4.3.2 https://etherscan.io/assets/css/custom.css?v=26.4.3.2 — 200 — 1.6 KiB — 32 ms — h3https://etherscan.io/assets/vendor/jquery/dist/jquery.min.js?v=26.4.3.2/assets/vendor/jquery/dist/jquery.m... https://etherscan.io/assets/vendor/jquery/dist/jquery.min.js?v=26.4.3.2 — 200 — 30.6 KiB — 50 ms — h3https://etherscan.io/jss/blockies.js?v=26.4.3.2/jss/blockies.js?v=26.4.3.2 https://etherscan.io/jss/blockies.js?v=26.4.3.2 — 200 — 1.5 KiB — 43 ms — h3https://etherscan.io/assets/js/theme-appearance.js?v=26.4.3.2/assets/js/theme-appearance.js?v=26... https://etherscan.io/assets/js/theme-appearance.js?v=26.4.3.2 — 200 — 1.6 KiB — 43 ms — h3https://etherscan.io/images/svg/brands/ethereum-original.svg/images/svg/brands/ethereum-origina... https://etherscan.io/images/svg/brands/ethereum-original.svg — 200 — 553 B — 35 ms — h3https://etherscan.io/images/svg/brands/ethereum-original-light.svg/images/svg/brands/ethereum-origina... https://etherscan.io/images/svg/brands/ethereum-original-light.svg — 200 — 550 B — 44 ms — h3https://etherscan.io/assets/svg/logos/logo-etherscan.svg?v=0.0.5/assets/svg/logos/logo-etherscan.sv... https://etherscan.io/assets/svg/logos/logo-etherscan.svg?v=0.0.5 — 200 — 4.5 KiB — 24 ms — h3https://etherscan.io/assets/svg/logos/logo-etherscan-light.svg?v=0.0.5/assets/svg/logos/logo-etherscan-li... https://etherscan.io/assets/svg/logos/logo-etherscan-light.svg?v=0.0.5 — 200 — 4.5 KiB — 21 ms — h3https://etherscan.io/images/svg/blockscan-logo-light.svg?v=0.0.5/images/svg/blockscan-logo-light.sv... https://etherscan.io/images/svg/blockscan-logo-light.svg?v=0.0.5 — 200 — 4.5 KiB — 14 ms — h3https://etherscan.io/assets/vendor/jquery-ui/jquery-ui.min.js?v=26.4.3.2/assets/vendor/jquery-ui/jquery-ui.... https://etherscan.io/assets/vendor/jquery-ui/jquery-ui.min.js?v=26.4.3.2 — 200 — 89.4 KiB — 22 ms — h3https://etherscan.io/assets/vendor/jquery-migrate/dist/jquery-migrate.min.js?v=26.4.3.2/assets/vendor/jquery-migrate/dist/... https://etherscan.io/assets/vendor/jquery-migrate/dist/jquery-migrate.min.js?v=26.4.3.2 — 200 — 3.2 KiB — 21 ms — h3https://etherscan.io/assets/vendor/bootstrap/bootstrap.bundle.min.js?v=26.4.3.2/assets/vendor/bootstrap/bootstrap.... https://etherscan.io/assets/vendor/bootstrap/bootstrap.bundle.min.js?v=26.4.3.2 — 200 — 30.6 KiB — 64 ms — h3https://etherscan.io/assets/vendor/clipboard/dist/clipboard.min.js?v=26.4.3.2/assets/vendor/clipboard/dist/clipb... https://etherscan.io/assets/vendor/clipboard/dist/clipboard.min.js?v=26.4.3.2 — 200 — 3.4 KiB — 51 ms — h3https://etherscan.io/assets/js/hs.core.js?v=26.4.3.2/assets/js/hs.core.js?v=26.4.3.2 https://etherscan.io/assets/js/hs.core.js?v=26.4.3.2 — 200 — 2.7 KiB — 69 ms — h3https://etherscan.io/assets/js/custom/combine-js-bottom2.js?v=26.4.3.2/assets/js/custom/combine-js-bottom... https://etherscan.io/assets/js/custom/combine-js-bottom2.js?v=26.4.3.2 — 200 — 3.8 KiB — 59 ms — h3https://etherscan.io/assets/vendor/autocomplete/dist/js/autocomplete.min.js?v=26.4.3.2/assets/vendor/autocomplete/dist/js... https://etherscan.io/assets/vendor/autocomplete/dist/js/autocomplete.min.js?v=26.4.3.2 — 200 — 4.0 KiB — 60 ms — h3https://etherscan.io/assets/vendor/xss.min.js?v=26.4.3.2/assets/vendor/xss.min.js?v=26.4.3.... https://etherscan.io/assets/vendor/xss.min.js?v=26.4.3.2 — 200 — 7.3 KiB — 61 ms — h3https://etherscan.io/assets/js/custom/ether-search.js?v=26.4.3.2/assets/js/custom/ether-search.js?v... https://etherscan.io/assets/js/custom/ether-search.js?v=26.4.3.2 — 200 — 12.6 KiB — 62 ms — h3https://etherscan.io/assets/js/app.min.js?v=26.4.3.2/assets/js/app.min.js?v=26.4.3.2 https://etherscan.io/assets/js/app.min.js?v=26.4.3.2 — 200 — 2.3 KiB — 62 ms — h3https://etherscan.io/assets/js/custom/web3.min.js?v=26.4.3.2/assets/js/custom/web3.min.js?v=26.... https://etherscan.io/assets/js/custom/web3.min.js?v=26.4.3.2 — 200 — 378.1 KiB — 158 ms — h3https://etherscan.io/assets/vendor/web3modal-1.9.8.min.js?v=26.4.3.2/assets/vendor/web3modal-1.9.8.min.... https://etherscan.io/assets/vendor/web3modal-1.9.8.min.js?v=26.4.3.2 — 200 — 203.1 KiB — 130 ms — h3https://etherscan.io/assets/vendor/walletlink_bundle.js?v=26.4.3.2/assets/vendor/walletlink_bundle.js... https://etherscan.io/assets/vendor/walletlink_bundle.js?v=26.4.3.2 — 200 — 301.6 KiB — 147 ms — h3https://etherscan.io/assets/js/custom/coinbase-wallet-sdk.js?v=26.4.3.2/assets/js/custom/coinbase-wallet-s... https://etherscan.io/assets/js/custom/coinbase-wallet-sdk.js?v=26.4.3.2 — 200 — 136.5 KiB — 114 ms — h3https://etherscan.io/assets/js/custom/wallet-handling-connect.js?v=26.4.3.2/assets/js/custom/wallet-handling-c... https://etherscan.io/assets/js/custom/wallet-handling-connect.js?v=26.4.3.2 — 200 — 5.3 KiB — 65 ms — h3
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s FCP 10.4 s LCP 20.8 shttps://etherscan.io// https://etherscan.io/ — 200 — 22.2 KiB — 355 ms — h3https://www.googletagmanager.com/gtag/js?id=G-T1JC9RNQXVwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-T1JC9RNQXV — 200 — 161.0 KiB — 64 ms — h2https://fonts.googleapis.com/css2?family=Roboto:wght@400;500;700&display=swapfonts.googleapis.com/css2?family=Ro... https://fonts.googleapis.com/css2?family=Roboto:wght@400;500;700&display=swap — 200 — 2.1 KiB — 22 ms — h2https://etherscan.io/assets/vendor/font-awesome/css/all.min.css?v=26.4.3.2/assets/vendor/font-awesome/css/all... https://etherscan.io/assets/vendor/font-awesome/css/all.min.css?v=26.4.3.2 — 200 — 98.1 KiB — 51 ms — h3https://etherscan.io/assets/vendor/autocomplete/dist/css/autocomplete.min.css?v=26.4.3.2/assets/vendor/autocomplete/dist/cs... https://etherscan.io/assets/vendor/autocomplete/dist/css/autocomplete.min.css?v=26.4.3.2 — 200 — 1.7 KiB — 30 ms — h3https://etherscan.io/assets/css/theme.min.css?v=26.4.3.2/assets/css/theme.min.css?v=26.4.3.... https://etherscan.io/assets/css/theme.min.css?v=26.4.3.2 — 200 — 54.4 KiB — 53 ms — h3https://etherscan.io/assets/css/custom.css?v=26.4.3.2/assets/css/custom.css?v=26.4.3.2 https://etherscan.io/assets/css/custom.css?v=26.4.3.2 — 200 — 1.6 KiB — 32 ms — h3https://etherscan.io/assets/vendor/jquery/dist/jquery.min.js?v=26.4.3.2/assets/vendor/jquery/dist/jquery.m... https://etherscan.io/assets/vendor/jquery/dist/jquery.min.js?v=26.4.3.2 — 200 — 30.6 KiB — 50 ms — h3https://etherscan.io/jss/blockies.js?v=26.4.3.2/jss/blockies.js?v=26.4.3.2 https://etherscan.io/jss/blockies.js?v=26.4.3.2 — 200 — 1.5 KiB — 43 ms — h3https://etherscan.io/assets/js/theme-appearance.js?v=26.4.3.2/assets/js/theme-appearance.js?v=26... https://etherscan.io/assets/js/theme-appearance.js?v=26.4.3.2 — 200 — 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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
38% of JavaScript execution is third-party
First-party Third-party 1719ms · 297KB · $23/mo
Google Tag Manager
Tag Manager
Costly
Execution 827ms
Transfer 161 KB
Unused 39%
Monthly Cost $11/mo
Unattributable
Other
Costly
Execution 674ms
Transfer 0 KB
Monthly Cost $9/mo
Google Tag Manager
Tag Manager
Optional
Execution 165ms
Transfer 116 KB
Unused 57%
Monthly Cost $2/mo
Google Analytics
Analytics
Optional
Execution 53ms
Transfer 21 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • Google Tag Manager adds 827ms and costs ~$11/month
  • Unattributable adds 674ms and costs ~$9/month

Google Tag Manager takes 827ms 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 674ms 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

57% of Google Tag Manager's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

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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