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Performance

· 16 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
80
GRADE
B
FIX
3
REVIEW
3
PASS
8
INFO
2

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

Mobile Desktop
65
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
92
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
69
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.

2.62 s

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

3.27 s

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

1.17 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.

2.65 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.

11.24 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
16
8 PASS 3 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 (1.3 MiB of 1.3 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
3462ms total JS execution
FIX
3462ms total JS execution
Warning::
https://forums.anandtech.com/: 654ms CPU time
Warning::
Unattributable: 596ms CPU time
Warning::
https://cdn.taboola.com/libtrc/futureplc-network/l...: 410ms CPU time
Warning::
https://bordeaux.futurecdn.net/bordeaux.js: 343ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-KJC...: 303ms CPU time
Warning::
Third-party scripts: 3462ms (100% of total)

Main Thread Breakdown

Script Evaluation 54% Script Parsing & Compilation 16% Style & Layout 13% Other 12%
ScriptTotalScriptingParse/CompileParty
https://forums.anandtech.com/654ms62ms8ms3rd
Unattributable596ms258ms0ms3rd
https://cdn.taboola.com/libtrc/futureplc-network/loader.js410ms192ms217ms3rd
https://bordeaux.futurecdn.net/bordeaux.js343ms250ms76ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-KJCP7P&l=gtmDataLayer303ms245ms52ms3rd
https://www.googletagmanager.com/gtag/js?id=G-ZYPP7YFBVB&l=gtmDataLayer&cx=c&gtm=4e6460248ms192ms54ms3rd
https://cdn.onesignal.com/sdks/OneSignalPageSDKES6.js?v=151607236ms169ms38ms3rd
https://www.googletagmanager.com/gtag/js?id=G-PYEVMBNKGH&cx=c&gtm=4e6460221ms171ms49ms3rd
https://www.googletagmanager.com/gtag/js?id=UA-1721979-3203ms151ms47ms3rd
https://forums.anandtech.com/js/xf/preamble.min.js?_v=fddf0136142ms113ms1ms3rd

Showing top 10 of 12 scripts

F
JS Bundles
Action
18 scripts, 659 KB unused
FIX
18 scripts, 659 KB unused
Warning::
https://cdn.taboola.com/libtrc/futureplc-network/l...: 200 KB unused (61%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://bordeaux.futurecdn.net/bordeaux.js: 89 KB unused (57%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-PYEV...: 81 KB unused (56%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-ZYPP...: 79 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=UA-172...: 67 KB unused (54%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 659 KB
659 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdn.taboola.com/libtrc/futureplc-network/loader.js331 KB200 KB (61%)✓3rd
https://bordeaux.futurecdn.net/bordeaux.js158 KB89 KB (57%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-PYEVMBNKGH&cx=c&gtm=4e6460145 KB81 KB (56%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-ZYPP7YFBVB&l=gtmDataLayer&cx=c&gtm=4e6460150 KB79 KB (53%)✓3rd
https://www.googletagmanager.com/gtag/js?id=UA-1721979-3125 KB67 KB (54%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-KJCP7P&l=gtmDataLayer133 KB60 KB (45%)✓3rd
https://cdn.onesignal.com/sdks/OneSignalPageSDKES6.js?v=15160769 KB45 KB (66%)✓3rd
https://forums.anandtech.com/js/xf/core-compiled.js?_v=fddf013653 KB38 KB (71%)✓3rd
https://cdn.onesignal.com/sdks/OneSignalSDK.js4 KB—✓3rd
https://assets.purch.com/creative-templates/latest/js/membership/OneSignal/LoadOneSignal.js3 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

B
Page Weight Budget
1.3 MB transferred, 42 requests
REVIEW
1.3 MB transferred, 42 requests
Info::
Page weighs 4.9 MB (1.3 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::
42 HTTP requests
Info::
Estimated 0.28 g CO2 per page load
1.3 MB / 2.4 MB budget
1.3 MB transferred
42 requests
0.28 g CO2 per page load
JavaScript 1.2 MiB 89%
CSS 47.6 KiB 4%
Other 47.6 KiB 4%
HTML 26.4 KiB 2%
Images 16.8 KiB 1%
Other 6.6 KiB 0%
Other 665 B 0%
Other 0 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
Image Optimization
6 images, 0 KB saveable
REVIEW
6 images, 0 KB saveable
Info::
All images are well-optimized
6 images 17 KB
0 oversized -0 KB
6 legacy format
0 missing dimensions CLS risk
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+
Font Loading
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
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
HTTP Caching
max-age=3600 (1 hour)
PASS
max-age=3600 (1 hour)
Info::
Cache-Control header is set
Got: max-age=3600
Info::
Effective TTL: 1 hour (max-age=3600)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=3600

DirectiveValueMeaning
max-age3600Cache for 1 hour
Effective TTL: 3600 seconds
Network Waterfall
42 requests over 0ms
INFO

Performance analysis not available for this result.

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 3462ms · 1210KB · €38/mo
forums.anandtech.com
Other
Costly
Execution 654ms
Transfer 26 KB
Monthly Cost €7/mo
Unattributable
Other
Costly
Execution 596ms
Transfer 0 KB
Monthly Cost €6/mo
cdn.taboola.com
Other
Costly
Execution 410ms
Transfer 331 KB
Unused 61%
Monthly Cost €4/mo
bordeaux.futurecdn.net
Other
Costly
Execution 343ms
Transfer 158 KB
Unused 57%
Monthly Cost €4/mo
Google Tag Manager
Tag Manager
Costly
Execution 303ms
Transfer 133 KB
Unused 45%
Monthly Cost €3/mo
Google Tag Manager
Tag Manager
Costly
Execution 248ms
Transfer 150 KB
Unused 53%
Monthly Cost €3/mo
cdn.onesignal.com
Other
Costly
Execution 236ms
Transfer 69 KB
Unused 66%
Monthly Cost €3/mo
Google Tag Manager
Tag Manager
Costly
Execution 221ms
Transfer 145 KB
Unused 56%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Costly
Execution 203ms
Transfer 125 KB
Unused 54%
Monthly Cost €2/mo
forums.anandtech.com
Other
Optional
Execution 142ms
Transfer 2 KB
Monthly Cost €2/mo
Google Analytics
Analytics
Optional
Execution 54ms
Transfer 17 KB
Monthly Cost €1/mo
forums.anandtech.com
Other
Optional
Execution 51ms
Transfer 53 KB
Unused 71%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • forums.anandtech.com adds 654ms and costs ~€7/month
  • Unattributable adds 596ms and costs ~€6/month
  • cdn.taboola.com adds 410ms and costs ~€4/month
  • bordeaux.futurecdn.net adds 343ms and costs ~€4/month
  • Google Tag Manager adds 303ms and costs ~€3/month
  • Google Tag Manager adds 248ms and costs ~€3/month
  • cdn.onesignal.com adds 236ms and costs ~€3/month
  • Google Tag Manager adds 221ms and costs ~€2/month
  • Google Tag Manager adds 203ms and costs ~€2/month

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

forums.anandtech.com takes 654ms 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 596ms 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

cdn.taboola.com takes 410ms 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

61% of cdn.taboola.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

bordeaux.futurecdn.net takes 343ms 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 bordeaux.futurecdn.net'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

Google Tag Manager takes 303ms 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

Google Tag Manager takes 248ms 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

53% 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

cdn.onesignal.com takes 236ms 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

66% of cdn.onesignal.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

Google Tag Manager takes 221ms 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

56% 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

Google Tag Manager takes 203ms 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

54% 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

71% of forums.anandtech.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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