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https://howstuffworks.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
81
GRADE
B
FIX
3
REVIEW
4
PASS
6
INFO
2

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

Mobile Desktop
88
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
99
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
73
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.

1.20 s

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

1.69 s

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

120 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.

1.28 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.

2.43 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 4 REVIEW 3 FIX
D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (1.2 MiB of 1.2 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Bundles
Action
9 scripts, 350 KB unused
FIX
9 scripts, 350 KB unused
Warning::
https://5474cb65a01c.607c33ca.eu-west-1.token.awsw...: 278 KB unused (55%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.cookielaw.org/scripttemplates/202601.2...: 73 KB unused (57%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 350 KB
350 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://5474cb65a01c.607c33ca.eu-west-1.token.awswaf.com/5474cb65a01c/4af37e2f20eb/3645d47b931c/challenge.js502 KB278 KB (55%)✓3rd
https://cdn.cookielaw.org/scripttemplates/202601.2.0/otBannerSdk.js128 KB73 KB (57%)✓3rd
https://ob.greencolumnblog.com/i/d57f74026e211bf94d3792e9f19dc289.js45 KB—✓3rd
https://cdn-assets.hswstatic.com/lite/3245/js/vendor/alpine.v3.min.js12 KB—✓3rd
https://cdn.cookielaw.org/scripttemplates/otSDKStub.js9 KB—✓3rd
https://js-agent.newrelic.com/nr-spa-1.313.0.min.js30 KB—✓3rd
https://cdn.cookielaw.org/scripttemplates/202601.2.0/otTCF.js18 KB—✓3rd
blob:https://www.howstuffworks.com/a7a50c8e-6fb8-402b-a736-2bf8e844bbe6-0 KB—✓3rd
https://cdn.cookielaw.org/scripttemplates/202601.2.0/otGPP.js22 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

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.

B
Page Weight Budget
1.2 MB transferred, 50 requests
REVIEW
1.2 MB transferred, 50 requests
Info::
Page weighs 3.9 MB (1.2 MB transferred)
Warning::
JavaScript is 765 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 765 KB
Info::
50 HTTP requests
Info::
Estimated 0.26 g CO2 per page load
1.2 MB / 2.4 MB budget
1.2 MB transferred
50 requests
0.26 g CO2 per page load
JavaScript 765.5 KiB 61%
Images 208.5 KiB 17%
Other 142.5 KiB 11%
HTML 71.6 KiB 6%
Fonts 54.7 KiB 4%
Other 12.8 KiB 1%
Other 1.5 KiB 0%
Other 802 B 0%
0 2.4 MB 4.9 MB
Under 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

B
JS Execution Cost
810ms total JS execution
REVIEW
810ms total JS execution
Info::
https://cdn.cookielaw.org/scripttemplates/202601.2...: 196ms CPU time
Info::
https://5474cb65a01c.607c33ca.eu-west-1.token.awsw...: 178ms CPU time
Info::
https://ob.greencolumnblog.com/i/d57f74026e211bf94...: 176ms CPU time
Info::
Unattributable: 142ms CPU time
Info::
https://www.howstuffworks.com/: 118ms CPU time
Warning::
Third-party scripts: 810ms (100% of total)

Main Thread Breakdown

Script Evaluation 65% Other 18% Script Parsing & Compilation 7% Style & Layout 5%
ScriptTotalScriptingParse/CompileParty
https://cdn.cookielaw.org/scripttemplates/202601.2.0/otGPP.js196ms180ms4ms3rd
https://5474cb65a01c.607c33ca.eu-west-1.token.awswaf.com/5474cb65a01c/4af37e2f20eb/3645d47b931c/challenge.js178ms128ms29ms3rd
https://ob.greencolumnblog.com/i/d57f74026e211bf94d3792e9f19dc289.js176ms142ms3ms3rd
Unattributable142ms31ms0ms3rd
https://www.howstuffworks.com/118ms43ms9ms3rd
C
Page Weight Inventory
Action
50 resources · 1.2 MB · 350 KB savings available
REVIEW
50 resources · 1.2 MB · 350 KB savings available
Warning::
Page weight 234 KB over 1MB target
Got: 1.2 MB Expected: ≤ 1 MB
Info::
~350 KB of savings available
Warning::
49 third-party resources (100% of weight)
Info::
1 resources over 200KB
50 resources · 1.2 MiB · 49 third-party 233.8 KiB over 1MB target
JavaScript 61% · 765.5 KiB
Image 17% · 211.0 KiB
Other 11% · 144.2 KiB
Document 6% · 77.7 KiB
Font 4% · 54.7 KiB
CSS 0% · 4.7 KiB

~350.3 KiB of savings available

Remove unused JavaScript: 350.3 KiB
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

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
Image Optimization
12 images, 0 KB saveable
PASS
12 images, 0 KB saveable
Info::
All images are well-optimized
12 images 209 KB
0 oversized -0 KB
3 legacy format
0 missing dimensions CLS risk
A+
Font Loading
3 fonts (55 KB)
PASS
3 fonts (55 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

55 KB total

Render-blocking

0

of 3

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 1.2 s LCP 1.7 shttps://cdn.hswstatic.com/fonts/roboto-v20-latin-regular.woff2roboto-v20-latin-regula... https://cdn.hswstatic.com/fonts/roboto-v20-latin-regular.woff2 — 15.8 KiB — 30 ms — font-display: swaphttps://cdn.hswstatic.com/fonts/roboto-v20-latin-700.woff2roboto-v20-latin-700.woff2 https://cdn.hswstatic.com/fonts/roboto-v20-latin-700.woff2 — 15.9 KiB — 27 ms — font-display: swaphttps://cdn.hswstatic.com/fonts/lato-v17-latin-700.woff2lato-v17-latin-700.woff2 https://cdn.hswstatic.com/fonts/lato-v17-latin-700.woff2 — 22.9 KiB — 29 ms — font-display: swap
roboto-v20-latin-regula... woff2 swap
Size 16 KB
Load time 30 ms
Start 541 ms
Risk FOUT — text flashes from fallback to web font
roboto-v20-latin-700.woff2 woff2 swap
Size 16 KB
Load time 27 ms
Start 541 ms
Risk FOUT — text flashes from fallback to web font
lato-v17-latin-700.woff2 woff2 swap
Size 23 KB
Load time 29 ms
Start 542 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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
Network Waterfall
50 requests over 4270ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 1.2 s LCP 1.7 shttps://howstuffworks.com// https://howstuffworks.com/ — 301 — 244 B — 7 ms — h2https://www.howstuffworks.com/www.howstuffworks.com/ https://www.howstuffworks.com/ — 202 — 2.3 KiB — 5 ms — h2https://5474cb65a01c.607c33ca.eu-west-1.token.awswaf.com/5474cb65a01c/4af37e2f20eb/3645d47b931c/challenge.js5474cb65a01c.607c33ca.eu-west-1.tok... https://5474cb65a01c.607c33ca.eu-west-1.token.awswaf.com/5474cb65a01c/4af37e2f20eb/3645d47b931c/challenge.js — 200 — 501.6 KiB — 83 ms — h2https://5474cb65a01c.607c33ca.eu-west-1.token.awswaf.com/5474cb65a01c/4af37e2f20eb/3645d47b931c/inputs?client=browser5474cb65a01c.607c33ca.eu-west-1.tok... https://5474cb65a01c.607c33ca.eu-west-1.token.awswaf.com/5474cb65a01c/4af37e2f20eb/3645d47b931c/inputs?client=browser — 200 — 828 B — 51 ms — h3https://www.howstuffworks.com/favicon.icowww.howstuffworks.com/favicon.ico https://www.howstuffworks.com/favicon.ico — 202 — 402 B — 4 ms — h2https://5474cb65a01c.607c33ca.eu-west-1.token.awswaf.com/5474cb65a01c/4af37e2f20eb/3645d47b931c/mp_verify5474cb65a01c.607c33ca.eu-west-1.tok... https://5474cb65a01c.607c33ca.eu-west-1.token.awswaf.com/5474cb65a01c/4af37e2f20eb/3645d47b931c/mp_verify — 200 — 629 B — 100 ms — h3https://5474cb65a01c.607c33ca.eu-west-1.token.awswaf.com/5474cb65a01c/4af37e2f20eb/3645d47b931c/mp_verify5474cb65a01c.607c33ca.eu-west-1.tok... https://5474cb65a01c.607c33ca.eu-west-1.token.awswaf.com/5474cb65a01c/4af37e2f20eb/3645d47b931c/mp_verify — 200 — 632 B — 79 ms — h3https://www.howstuffworks.com/www.howstuffworks.com/ https://www.howstuffworks.com/ — 200 — 69.3 KiB — 35 ms — h2https://ob.greencolumnblog.com/i/d57f74026e211bf94d3792e9f19dc289.jsob.greencolumnblog.com/i/d57f74026e... https://ob.greencolumnblog.com/i/d57f74026e211bf94d3792e9f19dc289.js — 200 — 44.6 KiB — 33 ms — h2https://cdn.hswstatic.com/fonts/roboto-v20-latin-regular.woff2cdn.hswstatic.com/fonts/roboto-v20-... https://cdn.hswstatic.com/fonts/roboto-v20-latin-regular.woff2 — 200 — 15.8 KiB — 30 ms — h2https://cdn.hswstatic.com/fonts/roboto-v20-latin-700.woff2cdn.hswstatic.com/fonts/roboto-v20-... https://cdn.hswstatic.com/fonts/roboto-v20-latin-700.woff2 — 200 — 15.9 KiB — 27 ms — h2https://cdn.hswstatic.com/fonts/lato-v17-latin-700.woff2cdn.hswstatic.com/fonts/lato-v17-la... https://cdn.hswstatic.com/fonts/lato-v17-latin-700.woff2 — 200 — 22.9 KiB — 29 ms — h2https://cdn.hswstatic.com/en-us/hsw/img/hsw-avatar-sm.pngcdn.hswstatic.com/en-us/hsw/img/hsw... https://cdn.hswstatic.com/en-us/hsw/img/hsw-avatar-sm.png — 200 — 2.2 KiB — 22 ms — h2https://media.hswstatic.com/eyJidWNrZXQiOiJjb250ZW50Lmhzd3N0YXRpYy5jb20iLCJrZXkiOiJnaWZcL3NodXR0ZXJzdG9jay0yMDkxMzg2MzIwLmpwZyIsImVkaXRzIjp7InJlc2l6ZSI6eyJ3aWR0aCI6OTgwfSwidG9Gb3JtYXQiOiJhdmlmIn19media.hswstatic.com/eyJidWNrZXQiOiJ... https://media.hswstatic.com/eyJidWNrZXQiOiJjb250ZW50Lmhzd3N0YXRpYy5jb20iLCJrZXkiOiJnaWZcL3NodXR0ZXJzdG9jay0yMDkxMzg2MzIwLmpwZyIsImVkaXRzIjp7InJlc2l6ZSI6eyJ3aWR0aCI6OTgwfSwidG9Gb3JtYXQiOiJhdmlmIn19 — 200 — 55.7 KiB — 26 ms — h2https://cdn-assets.hswstatic.com/lite/3245/js/vendor/alpine.v3.min.jscdn-assets.hswstatic.com/lite/3245/... https://cdn-assets.hswstatic.com/lite/3245/js/vendor/alpine.v3.min.js — 200 — 11.6 KiB — 10 ms — h2https://cdn.cookielaw.org/scripttemplates/otSDKStub.jscdn.cookielaw.org/scripttemplates/o... https://cdn.cookielaw.org/scripttemplates/otSDKStub.js — 200 — 9.1 KiB — 81 ms — h2data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAJCAQAAACRI2S5AAAAEElEQVR42mNkIAAYRxWAAQAG9gAKq…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAJCAQAAACRI2S5AAAAEElEQVR42mNkIAAYRxWAAQAG9gAKq… — 200 — 0 B — 0 ms — datahttps://www.howstuffworks.com/export/async-footer?nlPopup=0&nlFooter=1&locale=en-uswww.howstuffworks.com/export/async-... https://www.howstuffworks.com/export/async-footer?nlPopup=0&nlFooter=1&locale=en-us — 200 — 4.9 KiB — 8 ms — h2https://www.howstuffworks.com/manifest.jsonwww.howstuffworks.com/manifest.json https://www.howstuffworks.com/manifest.json — 202 — 402 B — 11 ms — h2https://obs.greencolumnblog.com/ctobs.greencolumnblog.com/ct https://obs.greencolumnblog.com/ct — 200 — 2.0 KiB — 323 ms — h2https://media.hswstatic.com/eyJidWNrZXQiOiJjb250ZW50Lmhzd3N0YXRpYy5jb20iLCJrZXkiOiJnaWZcL3NodXR0ZXJzdG9jay0yMDI4MDk4NjgxLmpwZyIsImVkaXRzIjp7InJlc2l6ZSI6eyJ3aWR0aCI6NjAwfSwidG9Gb3JtYXQiOiJhdmlmIn19media.hswstatic.com/eyJidWNrZXQiOiJ... https://media.hswstatic.com/eyJidWNrZXQiOiJjb250ZW50Lmhzd3N0YXRpYy5jb20iLCJrZXkiOiJnaWZcL3NodXR0ZXJzdG9jay0yMDI4MDk4NjgxLmpwZyIsImVkaXRzIjp7InJlc2l6ZSI6eyJ3aWR0aCI6NjAwfSwidG9Gb3JtYXQiOiJhdmlmIn19 — 200 — 22.6 KiB — 8 ms — h2https://media.hswstatic.com/eyJidWNrZXQiOiJjb250ZW50Lmhzd3N0YXRpYy5jb20iLCJrZXkiOiJnaWZcL3NodXR0ZXJzdG9jay0yNzM0OTMwMzQ3LmpwZyIsImVkaXRzIjp7InJlc2l6ZSI6eyJ3aWR0aCI6NjAwfSwidG9Gb3JtYXQiOiJhdmlmIn19media.hswstatic.com/eyJidWNrZXQiOiJ... https://media.hswstatic.com/eyJidWNrZXQiOiJjb250ZW50Lmhzd3N0YXRpYy5jb20iLCJrZXkiOiJnaWZcL3NodXR0ZXJzdG9jay0yNzM0OTMwMzQ3LmpwZyIsImVkaXRzIjp7InJlc2l6ZSI6eyJ3aWR0aCI6NjAwfSwidG9Gb3JtYXQiOiJhdmlmIn19 — 200 — 47.2 KiB — 9 ms — h2https://media.hswstatic.com/eyJidWNrZXQiOiJjb250ZW50Lmhzd3N0YXRpYy5jb20iLCJrZXkiOiJnaWZcL3NodXR0ZXJzdG9jay0xNzU4NzY0NzE3LmpwZyIsImVkaXRzIjp7InJlc2l6ZSI6eyJ3aWR0aCI6NjAwfSwidG9Gb3JtYXQiOiJhdmlmIn19media.hswstatic.com/eyJidWNrZXQiOiJ... https://media.hswstatic.com/eyJidWNrZXQiOiJjb250ZW50Lmhzd3N0YXRpYy5jb20iLCJrZXkiOiJnaWZcL3NodXR0ZXJzdG9jay0xNzU4NzY0NzE3LmpwZyIsImVkaXRzIjp7InJlc2l6ZSI6eyJ3aWR0aCI6NjAwfSwidG9Gb3JtYXQiOiJhdmlmIn19 — 200 — 19.6 KiB — 11 ms — h2https://media.hswstatic.com/eyJidWNrZXQiOiJjb250ZW50Lmhzd3N0YXRpYy5jb20iLCJrZXkiOiJnaWZcL3NodXR0ZXJzdG9jay0yMzYzMTE0NDY3LmpwZyIsImVkaXRzIjp7InJlc2l6ZSI6eyJ3aWR0aCI6NjAwfSwidG9Gb3JtYXQiOiJhdmlmIn19media.hswstatic.com/eyJidWNrZXQiOiJ... https://media.hswstatic.com/eyJidWNrZXQiOiJjb250ZW50Lmhzd3N0YXRpYy5jb20iLCJrZXkiOiJnaWZcL3NodXR0ZXJzdG9jay0yMzYzMTE0NDY3LmpwZyIsImVkaXRzIjp7InJlc2l6ZSI6eyJ3aWR0aCI6NjAwfSwidG9Gb3JtYXQiOiJhdmlmIn19 — 200 — 33.7 KiB — 12 ms — h2https://media.hswstatic.com/eyJidWNrZXQiOiJjb250ZW50Lmhzd3N0YXRpYy5jb20iLCJrZXkiOiJnaWZcL3JpZGRsZS1nYW1lLTg2LmpwZyIsImVkaXRzIjp7InJlc2l6ZSI6eyJ3aWR0aCI6MzIwLCJoZWlnaHQiOjE4MH0sInRvRm9ybWF0IjoiYXZpZiJ9fQ==media.hswstatic.com/eyJidWNrZXQiOiJ... https://media.hswstatic.com/eyJidWNrZXQiOiJjb250ZW50Lmhzd3N0YXRpYy5jb20iLCJrZXkiOiJnaWZcL3JpZGRsZS1nYW1lLTg2LmpwZyIsImVkaXRzIjp7InJlc2l6ZSI6eyJ3aWR0aCI6MzIwLCJoZWlnaHQiOjE4MH0sInRvRm9ybWF0IjoiYXZpZiJ9fQ== — 200 — 7.4 KiB — 14 ms — h2https://media.hswstatic.com/eyJidWNrZXQiOiJjb250ZW50Lmhzd3N0YXRpYy5jb20iLCJrZXkiOiJnaWZcL0Nyb3Nzd29yZC1IRVJPLmpwZyIsImVkaXRzIjp7InJlc2l6ZSI6eyJ3aWR0aCI6MzIwLCJoZWlnaHQiOjE4MH0sInRvRm9ybWF0IjoiYXZpZiJ9fQ==media.hswstatic.com/eyJidWNrZXQiOiJ... https://media.hswstatic.com/eyJidWNrZXQiOiJjb250ZW50Lmhzd3N0YXRpYy5jb20iLCJrZXkiOiJnaWZcL0Nyb3Nzd29yZC1IRVJPLmpwZyIsImVkaXRzIjp7InJlc2l6ZSI6eyJ3aWR0aCI6MzIwLCJoZWlnaHQiOjE4MH0sInRvRm9ybWF0IjoiYXZpZiJ9fQ== — 200 — 10.3 KiB — 15 ms — h2https://media.hswstatic.com/eyJidWNrZXQiOiJjb250ZW50Lmhzd3N0YXRpYy5jb20iLCJrZXkiOiJnaWZcL3JpZGRsZS1nYW1lLTg3LmpwZyIsImVkaXRzIjp7InJlc2l6ZSI6eyJ3aWR0aCI6MzIwLCJoZWlnaHQiOjE4MH0sInRvRm9ybWF0IjoiYXZpZiJ9fQ==media.hswstatic.com/eyJidWNrZXQiOiJ... https://media.hswstatic.com/eyJidWNrZXQiOiJjb250ZW50Lmhzd3N0YXRpYy5jb20iLCJrZXkiOiJnaWZcL3JpZGRsZS1nYW1lLTg3LmpwZyIsImVkaXRzIjp7InJlc2l6ZSI6eyJ3aWR0aCI6MzIwLCJoZWlnaHQiOjE4MH0sInRvRm9ybWF0IjoiYXZpZiJ9fQ== — 200 — 7.7 KiB — 15 ms — 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h2https://obs.greencolumnblog.com/tracker/tc_imp.gif?e=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&cri=bExmVfqHqX&ts=340&cb=1776798867279obs.greencolumnblog.com/tracker/tc_... https://obs.greencolumnblog.com/tracker/tc_imp.gif?e=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&cri=bExmVfqHqX&ts=340&cb=1776798867279 — 200 — 79 B — 100 ms — h2blob:https://www.howstuffworks.com/a7a50c8e-6fb8-402b-a736-2bf8e844bbe6www.howstuffworks.com/a7a50c8e-6fb8... blob:https://www.howstuffworks.com/a7a50c8e-6fb8-402b-a736-2bf8e844bbe6 — 200 — -1 B — 36 ms — blobhttps://cdn.cookielaw.org/scripttemplates/202601.2.0/otGPP.jscdn.cookielaw.org/scripttemplates/2... https://cdn.cookielaw.org/scripttemplates/202601.2.0/otGPP.js — 200 — 22.2 KiB — 37 ms — h2https://cdn.cookielaw.org/scripttemplates/202601.2.0/assets/otFlat.jsoncdn.cookielaw.org/scripttemplates/2... https://cdn.cookielaw.org/scripttemplates/202601.2.0/assets/otFlat.json — 200 — 3.4 KiB — 31 ms — h2https://cdn.cookielaw.org/scripttemplates/202601.2.0/assets/otCommonStyles.csscdn.cookielaw.org/scripttemplates/2... https://cdn.cookielaw.org/scripttemplates/202601.2.0/assets/otCommonStyles.css — 200 — 4.7 KiB — 33 ms — h2https://obs.greencolumnblog.com/monobs.greencolumnblog.com/mon https://obs.greencolumnblog.com/mon — 200 — 41 B — 102 ms — h2https://obs.greencolumnblog.com/monobs.greencolumnblog.com/mon https://obs.greencolumnblog.com/mon — 200 — 16 B — 101 ms — h2https://obs.greencolumnblog.com/monobs.greencolumnblog.com/mon https://obs.greencolumnblog.com/mon — 200 — 39 B — 101 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 810ms · 638KB · $11/mo
OneTrust
Consent
Essential
Execution 196ms
Transfer 22 KB
Monthly Cost $3/mo
5474cb65a01c.607c33ca.eu-west-1.token.awswaf.com
Other
Optional
Execution 178ms
Transfer 502 KB
Unused 55%
Monthly Cost $2/mo
ob.greencolumnblog.com
Other
Optional
Execution 176ms
Transfer 45 KB
Monthly Cost $2/mo
Unattributable
Other
Optional
Execution 142ms
Transfer 0 KB
Monthly Cost $2/mo
www.howstuffworks.com
Other
Optional
Execution 118ms
Transfer 69 KB
Monthly Cost $2/mo

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

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

55% of 5474cb65a01c.607c33ca.eu-west-1.token.awswaf.com'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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