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Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
75
GRADE
C
FIX
3
REVIEW
2
PASS
7
INFO
2

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

Mobile Desktop
61
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.
100
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.

3.55 s

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

3.55 s

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

16 ms

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

0.003

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

6.14 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.

17.44 s

Page Load Progression

681 ms
1.4 s
2.0 s
2.7 s
3.4 s
4.1 s
4.8 s
5.4 s
Checks
14
7 PASS 2 REVIEW 3 FIX
F
Page Weight Budget
Action
48.6 MB transferred, 148 requests
FIX
48.6 MB transferred, 148 requests
Critical::
Page weighs 58.9 MB (48.6 MB transferred)
Warning::
Images are 29.7 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 29.7 MB
Warning::
JavaScript is 2.1 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 2.1 MB
Info::
Fonts are 1.1 MB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 1.1 MB
Warning::
148 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 10.2 g CO2 per page load
48.6 MB / 2.4 MB budget
48.6 MB transferred
148 requests
10.2 g CO2 per page load
Images 29.7 MiB 61%
Other 15.3 MiB 31%
JavaScript 2.1 MiB 4%
Fonts 1.1 MiB 2%
HTML 194.2 KiB 0%
CSS 159.9 KiB 0%
Other 38.5 KiB 0%
Other 26.9 KiB 0%
Other 2.5 KiB 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

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

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

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
JS Execution Cost
Action
2030ms total JS execution
FIX
2030ms total JS execution
Warning::
https://www.docker.com/: 754ms CPU time
Warning::
Unattributable: 643ms CPU time
Info::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 138ms CPU time
Info::
https://assets.adobedtm.com/ba6d3e7c167e/6bf3c6b5f...: 112ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-WL2...: 110ms CPU time
Warning::
Third-party scripts: 1200ms (59% of total)

Main Thread Breakdown

Script Evaluation 39% Other 37% Style & Layout 12% Script Parsing & Compilation 5% Rendering 4%
ScriptTotalScriptingParse/CompileParty
https://www.docker.com/754ms237ms6ms1st
Unattributable643ms36ms0ms3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js138ms111ms18ms3rd
https://assets.adobedtm.com/ba6d3e7c167e/6bf3c6b5f665/launch-55e2612a4c37.min.js112ms83ms26ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WL2QLG5110ms83ms16ms3rd
https://cdn.cookielaw.org/scripttemplates/202306.2.0/otBannerSdk.js102ms59ms10ms3rd
https://js-agent.newrelic.com/nr-spa-1.312.1.min.js96ms77ms6ms3rd
https://www.docker.com/app/themes/Ponyo/dist/js/index.js?ver=342915518c6a5189483775ms59ms11ms1st
F
JS Bundles
Action
64 scripts, 819 KB unused
FIX
64 scripts, 819 KB unused
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 179 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 179 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 179 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-WL2...: 82 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.docker.com/app/themes/Ponyo/dist/js/in...: 82 KB unused (67%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 819 KB
819 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js363 KB179 KB (49%)✓3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js0 KB179 KB (49%)✓3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js363 KB179 KB (49%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WL2QLG5167 KB82 KB (49%)✓3rd
https://www.docker.com/app/themes/Ponyo/dist/js/index.js?ver=342915518c6a51894837122 KB82 KB (67%)✓1st
https://cdn.cookielaw.org/scripttemplates/202306.2.0/otBannerSdk.js98 KB50 KB (52%)✓3rd
https://assets.adobedtm.com/ba6d3e7c167e/6bf3c6b5f665/launch-55e2612a4c37.min.js84 KB44 KB (53%)✓3rd
https://www.docker.com/wp/wp-includes/js/jquery/jquery.min.js?ver=3.7.135 KB23 KB (68%)✓1st
https://www.docker.com/app/plugins/syntaxhighlighter/syntaxhighlighter3/scripts/shBrushPlain.js?ver=3.0.9b1 KB—✓1st
https://www.docker.com/app/plugins/syntaxhighlighter/third-party-brushes/shBrushR.js?ver=201009191 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

B
Image Optimization
38 images, 0 KB saveable
REVIEW
38 images, 0 KB saveable
Warning::
https://www.docker.com/app/uploads/2024/01/icon-ne... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
38 images 29.7 MB
0 oversized -0 KB
21 legacy format
1 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

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Third-Party Impact
5% third-party, 0 ms blocking
PASS
5% third-party, 0 ms blocking
Info::
Third-party code accounts for 5% of page weight (2.3 MiB of 48.6 MiB)
Info::
Third-party blocking time is low (0 ms)
95%
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
8 fonts (1099 KB)
PASS
8 fonts (1099 KB)
Info::
8 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

8

1099 KB total

Render-blocking

0

of 8

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 3.5 s LCP 3.5 shttps://www.docker.com/app/themes/Ponyo/dist/fonts/Inter-Bold.88fa7ae3.ttfInter-Bold.88fa7ae3.ttf https://www.docker.com/app/themes/Ponyo/dist/fonts/Inter-Bold.88fa7ae3.ttf — 162.2 KiB — 0 ms — font-display: swaphttps://www.docker.com/app/themes/Ponyo/dist/fonts/Inter-Medium.6dcbc9be.ttfInter-Medium.6dcbc9be.ttf https://www.docker.com/app/themes/Ponyo/dist/fonts/Inter-Medium.6dcbc9be.ttf — 160.5 KiB — 0 ms — font-display: swaphttps://www.docker.com/app/themes/Ponyo/dist/fonts/Inter-Regular.e89cb199.ttfInter-Regular.e89cb199.ttf https://www.docker.com/app/themes/Ponyo/dist/fonts/Inter-Regular.e89cb199.ttf — 152.0 KiB — 0 ms — font-display: swaphttps://www.docker.com/app/themes/Ponyo/dist/fonts/Inter-SemiBold.4d56bb21.ttfInter-SemiBold.4d56bb21... https://www.docker.com/app/themes/Ponyo/dist/fonts/Inter-SemiBold.4d56bb21.ttf — 162.1 KiB — 0 ms — font-display: swaphttps://www.docker.com/app/themes/Ponyo/dist/fonts/ABCRepro-Medium.2e19b89f.woff2ABCRepro-Medium.2e19b89... https://www.docker.com/app/themes/Ponyo/dist/fonts/ABCRepro-Medium.2e19b89f.woff2 — 195.3 KiB — 0 ms — font-display: swaphttps://www.docker.com/app/themes/Ponyo/dist/fonts/ABCRepro-Bold.fe39dde5.woff2ABCRepro-Bold.fe39dde5.... https://www.docker.com/app/themes/Ponyo/dist/fonts/ABCRepro-Bold.fe39dde5.woff2 — 199.4 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 33.9 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 33.9 KiB — 0 ms — font-display: swap
Inter-Bold.88fa7ae3.ttf ttf swap
Size 162 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
Inter-Medium.6dcbc9be.ttf ttf swap
Size 160 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
Inter-Regular.e89cb199.ttf ttf swap
Size 152 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
Inter-SemiBold.4d56bb21... ttf swap
Size 162 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
ABCRepro-Medium.2e19b89... woff2 swap
Size 195 KB
Load time 0 ms
Start 0 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
ABCRepro-Bold.fe39dde5.... woff2 swap
Size 199 KB
Load time 0 ms
Start 0 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 34 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 34 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)

Fixing the unchecked items could save ~707 KB and ~1414 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
HTTP Caching
max-age=604800 (1 week)
PASS
max-age=604800 (1 week)
Info::
Cache-Control header is set
Got: public, max-age=604800
Info::
Effective TTL: 1 week (max-age=604800)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

public, max-age=604800

DirectiveValueMeaning
public—Any cache may store this response
max-age604800Cache for 1 week
Effective TTL: 604800 seconds
Network Waterfall
148 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
59% of JavaScript execution is third-party
First-party Third-party 1200ms · 379KB · $16/mo
Unattributable
Other
Costly
Execution 643ms
Transfer 0 KB
Monthly Cost $9/mo
www.gstatic.com
Other
Optional
Execution 138ms
Transfer 0 KB
Unused 49%
Monthly Cost $2/mo
assets.adobedtm.com
Other
Optional
Execution 112ms
Transfer 84 KB
Unused 53%
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 110ms
Transfer 167 KB
Unused 49%
Monthly Cost $1/mo
OneTrust
Consent
Essential
Execution 102ms
Transfer 98 KB
Unused 52%
Monthly Cost $1/mo
js-agent.newrelic.com
Other
Optional
Execution 96ms
Transfer 30 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • Unattributable adds 643ms and costs ~$9/month

59% 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

Unattributable takes 643ms 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 assets.adobedtm.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

52% of OneTrust'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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