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Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
80
GRADE
B
FIX
2
REVIEW
4
PASS
6
INFO
2

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

Mobile Desktop
93
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
88
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.

1.18 s

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

1.29 s

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

73 ms

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

0.010

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

1.18 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.

2.84 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
14
6 PASS 4 REVIEW 2 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 (1.5 MiB of 1.5 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Bundles
Action
19 scripts, 750 KB unused
FIX
19 scripts, 750 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://www.googletagmanager.com/gtag/js?id=UA-172...: 91 KB unused (73%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://bordeaux.futurecdn.net/bordeaux.js: 89 KB unused (56%)
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.
Info::
Total unused JavaScript: 750 KB
750 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://www.googletagmanager.com/gtag/js?id=UA-1721979-3&l=gtmDataLayer&cx=c&gtm=4e6460124 KB91 KB (73%)✓3rd
https://bordeaux.futurecdn.net/bordeaux.js159 KB89 KB (56%)✓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-1721979-3124 KB68 KB (55%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-KJCP7P&l=gtmDataLayer133 KB59 KB (44%)✓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://forums.anandtech.com/js/xf/preamble.min.js?_v=fddf01362 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
1.5 MB transferred, 64 requests
REVIEW
1.5 MB transferred, 64 requests
Info::
Page weighs 5.3 MB (1.5 MB transferred)
Warning::
JavaScript is 1.3 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.3 MB
Info::
64 HTTP requests
Info::
Estimated 0.31 g CO2 per page load
1.5 MB / 2.4 MB budget
1.5 MB transferred
64 requests
0.31 g CO2 per page load
JavaScript 1.3 MiB 87%
Images 74.4 KiB 5%
CSS 47.6 KiB 3%
Other 47.6 KiB 3%
HTML 26.4 KiB 2%
Other 6.8 KiB 0%
Other 665 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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
27 images, 0 KB saveable
REVIEW
27 images, 0 KB saveable
Info::
All images are well-optimized
27 images 74 KB
0 oversized -0 KB
26 legacy format
0 missing dimensions CLS risk
B
JS Execution Cost
855ms total JS execution
REVIEW
855ms total JS execution
Info::
Unattributable: 186ms CPU time
Info::
https://forums.anandtech.com/: 183ms CPU time
Info::
https://cdn.taboola.com/libtrc/futureplc-network/l...: 95ms CPU time
Info::
https://bordeaux.futurecdn.net/bordeaux.js: 91ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-KJC...: 73ms CPU time
Warning::
Third-party scripts: 855ms (100% of total)

Main Thread Breakdown

Script Evaluation 52% Script Parsing & Compilation 16% Other 14% Style & Layout 13% Rendering 3%
ScriptTotalScriptingParse/CompileParty
Unattributable186ms66ms0ms3rd
https://forums.anandtech.com/183ms21ms2ms3rd
https://cdn.taboola.com/libtrc/futureplc-network/loader.js95ms47ms48ms3rd
https://bordeaux.futurecdn.net/bordeaux.js91ms64ms21ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-KJCP7P&l=gtmDataLayer73ms58ms13ms3rd
https://www.googletagmanager.com/gtag/js?id=G-ZYPP7YFBVB&l=gtmDataLayer&cx=c&gtm=4e646066ms51ms15ms3rd
https://cdn.onesignal.com/sdks/OneSignalPageSDKES6.js?v=15160756ms40ms8ms3rd
https://www.googletagmanager.com/gtag/js?id=G-PYEVMBNKGH&cx=c&gtm=4e646055ms42ms12ms3rd
https://forums.anandtech.com/js/xf/preamble.min.js?_v=fddf013651ms38ms0ms3rd
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
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
64 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 855ms · 1015KB · €9/mo
Unattributable
Other
Optional
Execution 186ms
Transfer 0 KB
Monthly Cost €2/mo
forums.anandtech.com
Other
Optional
Execution 183ms
Transfer 26 KB
Monthly Cost €2/mo
cdn.taboola.com
Other
Optional
Execution 95ms
Transfer 331 KB
Unused 61%
Monthly Cost €1/mo
bordeaux.futurecdn.net
Other
Optional
Execution 91ms
Transfer 159 KB
Unused 56%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 73ms
Transfer 133 KB
Unused 44%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 66ms
Transfer 150 KB
Unused 53%
Monthly Cost €1/mo
cdn.onesignal.com
Other
Optional
Execution 56ms
Transfer 69 KB
Unused 66%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 55ms
Transfer 145 KB
Unused 56%
Monthly Cost €1/mo
forums.anandtech.com
Other
Optional
Execution 51ms
Transfer 2 KB
Monthly Cost €1/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

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

56% 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

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

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

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

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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