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https://www.premierleague.com

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
72
GRADE
C
FIX
4
REVIEW
2
PASS
6
INFO
2

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

Mobile Desktop
53
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.
77
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
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.

1.19 s

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

3.25 s

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

395 ms

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

0.012

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

4.76 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.

8.77 s

Page Load Progression

839 ms
1.7 s
2.5 s
3.4 s
4.2 s
5.0 s
5.9 s
6.7 s
Checks
14
6 PASS 2 REVIEW 4 FIX
F
Page Weight Budget
Action
7.5 MB transferred, 503 requests
FIX
7.5 MB transferred, 503 requests
Critical::
Page weighs 27.3 MB (7.5 MB transferred)
Warning::
JavaScript is 2.5 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 2.5 MB
Warning::
Images are 2.0 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 2.0 MB
Warning::
503 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 1.6 g CO2 per page load
7.5 MB / 2.4 MB budget
7.5 MB transferred
503 requests
1.6 g CO2 per page load
JavaScript 2.5 MiB 33%
Images 2.0 MiB 26%
Other 1.8 MiB 23%
Other 1.0 MiB 13%
HTML 140.7 KiB 2%
CSS 127.9 KiB 2%
Fonts 32.3 KiB 0%
Other 4.0 KiB 0%
Other 2.6 KiB 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

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

D
Third-Party Impact
Action
69% third-party, 0 ms blocking
FIX
69% third-party, 0 ms blocking
Warning::
Third-party code accounts for 69% of page weight (5.2 MiB of 7.5 MiB)
Info::
Third-party blocking time is low (0 ms)
31%
69%
First-party Third-party
F
JS Execution Cost
Action
5713ms total JS execution
FIX
5713ms total JS execution
Warning::
https://sdk.mvp.fan/web-sdk/0.34.2/index.js: 1759ms CPU time
Warning::
https://www.premierleague.com/resources/v1.43.2/sc...: 1555ms CPU time
Warning::
Unattributable: 748ms CPU time
Warning::
https://www.premierleague.com/en: 484ms CPU time
Warning::
https://cdn.optimizely.com/js/5530288147660800.js: 255ms CPU time
Warning::
Third-party scripts: 3518ms (62% of total)

Main Thread Breakdown

Script Evaluation 43% Style & Layout 27% Other 16% Script Parsing & Compilation 7% Rendering 4%
ScriptTotalScriptingParse/CompileParty
https://sdk.mvp.fan/web-sdk/0.34.2/index.js1759ms707ms104ms3rd
https://www.premierleague.com/resources/v1.43.2/scripts/bundle-es.min.js1555ms728ms29ms1st
Unattributable748ms120ms0ms3rd
https://www.premierleague.com/en484ms8ms2ms1st
https://cdn.optimizely.com/js/5530288147660800.js255ms196ms45ms3rd
https://www.premierleague.com/resources/v1.43.2/scripts/personalised-content-rail.js155ms122ms0ms1st
https://assets.adobedtm.com/e7ad550d4f82/693c01019a2b/launch-a4f579b5dcc4.min.js148ms99ms35ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-MDWXC59G107ms66ms37ms3rd
https://www.googletagmanager.com/gtag/js?id=GT-WFFZ7FXF&cx=c&gtm=4e646090ms75ms14ms3rd
https://www.googletagmanager.com/gtag/js?id=DC-15326134&cx=c&gtm=4e646086ms59ms11ms3rd

Showing top 10 of 14 scripts

F
JS Bundles
Action
121 scripts, 2.0 MB unused
FIX
121 scripts, 2.0 MB unused
Warning::
https://imasdk.googleapis.com/js/sdkloader/ima3.js: 351 KB unused (76%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://imasdk.googleapis.com/js/sdkloader/ima3.js: 351 KB unused (76%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://securepubads.g.doubleclick.net/pagead/mana...: 138 KB unused (75%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://sdk.mvp.fan/web-sdk/0.34.2/index.js: 122 KB unused (61%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://sdk.mvp.fan/web-sdk/0.34.2/index.js: 122 KB unused (61%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 2.0 MB
2085 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://imasdk.googleapis.com/js/sdkloader/ima3.js145 KB351 KB (76%)✓3rd
https://imasdk.googleapis.com/js/sdkloader/ima3.js0 KB351 KB (76%)✓3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604030101/pubads_impl.js?cb=31097680183 KB138 KB (75%)✓3rd
https://sdk.mvp.fan/web-sdk/0.34.2/index.js200 KB122 KB (61%)✓3rd
https://sdk.mvp.fan/web-sdk/0.34.2/index.js0 KB122 KB (61%)✓3rd
https://sdk.mvp.fan/web-sdk/js/hls.js@1.5.20.js122 KB110 KB (91%)✓3rd
https://www.premierleague.com/resources/v1.43.2/scripts/bundle-es.min.js0 KB96 KB (42%)✓1st
https://www.premierleague.com/resources/v1.43.2/scripts/bundle-es.min.js228 KB96 KB (42%)✓1st
https://www.premierleague.com/resources/v1.43.2/scripts/copilot-thread.js115 KB87 KB (78%)✓1st
https://www.googletagmanager.com/gtm.js?id=GTM-MDWXC59G0 KB73 KB (47%)✓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

C
Image Optimization
Action
164 images, 0 KB saveable
REVIEW
164 images, 0 KB saveable
Warning::
https://resources.premierleague.com/premierleague2... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://resources.premierleague.com/premierleague2... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
164 images 1.9 MB
0 oversized -0 KB
91 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

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
4 fonts (32 KB)
PASS
4 fonts (32 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

32 KB total

Render-blocking

0

of 4

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s FCP 1.2 s LCP 3.2 shttps://www.premierleague.com/resources/v1.43.2/fonts/PremierLeagueW01-Regular.woff2PremierLeagueW01-Regula... https://www.premierleague.com/resources/v1.43.2/fonts/PremierLeagueW01-Regular.woff2 — 16.5 KiB — 0 ms — font-display: swaphttps://www.premierleague.com/resources/v1.43.2/fonts/PremierLeagueW01-Bold.woff2PremierLeagueW01-Bold.w... https://www.premierleague.com/resources/v1.43.2/fonts/PremierLeagueW01-Bold.woff2 — 15.8 KiB — 0 ms — font-display: swaphttps://www.premierleague.com/resources/v1.43.2/fonts/PremierLeagueW01-Regular.woff2PremierLeagueW01-Regula... https://www.premierleague.com/resources/v1.43.2/fonts/PremierLeagueW01-Regular.woff2 — 0 B — 0 ms — font-display: swaphttps://www.premierleague.com/resources/v1.43.2/fonts/PremierLeagueW01-Bold.woff2PremierLeagueW01-Bold.w... https://www.premierleague.com/resources/v1.43.2/fonts/PremierLeagueW01-Bold.woff2 — 0 B — 0 ms — font-display: swap
PremierLeagueW01-Regula... woff2 swap
Size 17 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
PremierLeagueW01-Bold.w... woff2 swap
Size 16 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
PremierLeagueW01-Regula... woff2 swap
Size 0 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
PremierLeagueW01-Bold.w... woff2 swap
Size 0 KB
Load time 0 ms
Start 0 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
A
HTTP Caching
max-age=30 (30 seconds)
PASS
max-age=30 (30 seconds)
Info::
Cache-Control header is set
Got: max-age=30, stale-while-revalidate=600, stale-if-error=86400
Info::
Effective TTL: 30 seconds (max-age=30)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=30, stale-while-revalidate=600, stale-if-error=86400

DirectiveValueMeaning
max-age30Cache for 30 seconds
stale-while-revalidate600Serve stale for 10 minutes while fetching fresh
stale-if-error86400
Effective TTL: 30 seconds
Network Waterfall
503 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
62% of JavaScript execution is third-party
First-party Third-party 3518ms · 693KB · €61/mo
sdk.mvp.fan
Other
Costly
Execution 1759ms
Transfer 0 KB
Unused 61%
Monthly Cost €31/mo
Unattributable
Other
Costly
Execution 748ms
Transfer 0 KB
Monthly Cost €13/mo
Optimizely
A/B Testing
Costly
Execution 255ms
Transfer 0 KB
Unused 41%
Monthly Cost €4/mo
assets.adobedtm.com
Other
Optional
Execution 148ms
Transfer 0 KB
Monthly Cost €3/mo
Google Tag Manager
Tag Manager
Optional
Execution 107ms
Transfer 0 KB
Unused 47%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 90ms
Transfer 143 KB
Unused 39%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 86ms
Transfer 129 KB
Unused 44%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 85ms
Transfer 129 KB
Unused 43%
Monthly Cost €1/mo
analytics.tiktok.com
Other
Optional
Execution 84ms
Transfer 110 KB
Unused 51%
Monthly Cost €1/mo
cdn-ukwest.onetrust.com
Other
Optional
Execution 84ms
Transfer 0 KB
Unused 53%
Monthly Cost €1/mo
securepubads.g.doubleclick.net
Other
Optional
Execution 72ms
Transfer 183 KB
Unused 75%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • sdk.mvp.fan adds 1759ms and costs ~€31/month
  • Unattributable adds 748ms and costs ~€13/month
  • Optimizely adds 255ms and costs ~€4/month

62% 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

sdk.mvp.fan takes 1759ms 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 sdk.mvp.fan'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

Unattributable takes 748ms 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

Optimizely takes 255ms 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

51% of analytics.tiktok.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

53% of cdn-ukwest.onetrust.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

75% of securepubads.g.doubleclick.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

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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