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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
70
GRADE
C
FIX
5
REVIEW
3
PASS
5
INFO
2

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

Mobile Desktop
71
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
83
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
73
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.

2.41 s

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

2.52 s

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

11 ms

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

0.005

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

3.10 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.

2.53 s

Page Load Progression

696 ms
1.4 s
2.1 s
2.8 s
3.5 s
4.2 s
4.9 s
5.6 s
Checks
15
5 PASS 3 REVIEW 5 FIX
F
Page Weight Budget
Action
4.8 MB transferred, 63 requests
FIX
4.8 MB transferred, 63 requests
Critical::
Page weighs 6.1 MB (4.8 MB transferred)
Warning::
Images are 4.1 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 4.1 MB
Warning::
JavaScript is 580 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 580 KB
Info::
63 HTTP requests
Info::
Estimated 1.0 g CO2 per page load
4.8 MB / 2.4 MB budget
4.8 MB transferred
63 requests
1.0 g CO2 per page load
Images 4.1 MiB 85%
JavaScript 580.3 KiB 12%
CSS 72.1 KiB 1%
HTML 35.3 KiB 1%
Fonts 28.7 KiB 1%
Other 26.4 KiB 1%
Other 4.5 KiB 0%
Other 242 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

D
Third-Party Impact
Action
99% third-party, 0 ms blocking
FIX
99% third-party, 0 ms blocking
Warning::
Third-party code accounts for 99% of page weight (4.8 MiB of 4.8 MiB)
Info::
Third-party blocking time is low (0 ms)
99%
First-party Third-party
D
JS Bundles
Action
14 scripts, 338 KB unused
FIX
14 scripts, 338 KB unused
Warning::
https://archive.org/includes/build/js/archive.min....: 192 KB unused (82%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://web-static.archive.org/_static/waybackjs/v...: 93 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://archive.org/components/npm/@webcomponents/...: 31 KB unused (76%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://web-static.archive.org/_static/waybackjs/m...: 21 KB unused (52%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 338 KB
338 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://archive.org/includes/build/js/archive.min.js?v=dd67c3ca235 KB192 KB (82%)✓3rd
https://web-static.archive.org/_static/waybackjs/vendors~main.5c55ac5c0b4418a2bfaf.js213 KB93 KB (44%)✓3rd
https://archive.org/components/npm/@webcomponents/webcomponentsjs/webcomponents-bundle.js?v=dd67c3ca42 KB31 KB (76%)✓3rd
https://web-static.archive.org/_static/waybackjs/main.e7b2354c86916e40324f.js41 KB21 KB (52%)✓3rd
https://archive.org/includes/build/js/ia-topnav.min.js?v=dd67c3ca6 KB—✓3rd
https://archive.org/components/npm/lit/polyfill-support.js?v=dd67c3ca3 KB—✓3rd
https://web-static.archive.org/_static/js/ui.js?v=7LYlZ-C21 KB—✓3rd
https://web-static.archive.org/_static/waybackjs/runtime.70559ba0c42caadaa575.js3 KB—✓3rd
https://archive.org/includes/apollo.js?v=dd67c3ca2 KB—✓3rd
https://archive.org/includes/athena.js?v=dd67c3ca6 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

D
Page Weight Inventory
Action
63 resources · 4.8 MB · 338 KB savings available
FIX
63 resources · 4.8 MB · 338 KB savings available
Warning::
Page weight 3.8 MB over 1MB target
Got: 4.8 MB Expected: ≤ 1 MB
Info::
~338 KB of savings available
Warning::
61 third-party resources (99% of weight)
Info::
3 resources over 200KB
63 resources · 4.8 MiB · 61 third-party 3.8 MiB over 1MB target
Image 85% · 4.1 MiB
JavaScript 12% · 580.3 KiB
CSS 1% · 72.1 KiB
Document 1% · 35.3 KiB
Font 1% · 28.7 KiB
Other 1% · 26.4 KiB

~337.5 KiB of savings available

Remove unused JavaScript: 337.5 KiB
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.

C
Image Optimization
Action
37 images, 0 KB saveable
REVIEW
37 images, 0 KB saveable
Warning::
https://web-static.archive.org/_static/waybackjs/s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web-static.archive.org/_static/waybackjs/s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web-static.archive.org/_static/waybackjs/s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web-static.archive.org/_static/waybackjs/s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web-static.archive.org/_static/waybackjs/s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web-static.archive.org/_static/waybackjs/s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web-static.archive.org/_static/waybackjs/s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web-static.archive.org/_static/waybackjs/s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web-static.archive.org/_static/waybackjs/s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web-static.archive.org/_static/waybackjs/s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web-static.archive.org/_static/waybackjs/s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web-static.archive.org/_static/waybackjs/s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web-static.archive.org/_static/waybackjs/s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web-static.archive.org/_static/waybackjs/s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web-static.archive.org/_static/waybackjs/s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web-static.archive.org/_static/waybackjs/s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web-static.archive.org/_static/waybackjs/s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web-static.archive.org/_static/waybackjs/s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web-static.archive.org/_static/waybackjs/s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web-static.archive.org/_static/waybackjs/s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web-static.archive.org/_static/waybackjs/s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web-static.archive.org/_static/waybackjs/s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web-static.archive.org/_static/waybackjs/s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web-static.archive.org/_static/waybackjs/s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web-static.archive.org/_static/waybackjs/s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web-static.archive.org/_static/waybackjs/s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web-static.archive.org/_static/waybackjs/s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web-static.archive.org/_static/waybackjs/s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web-static.archive.org/_static/waybackjs/s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web-static.archive.org/_static/waybackjs/s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web-static.archive.org/_static/waybackjs/s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web-static.archive.org/_static/waybackjs/s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://web-static.archive.org/_static/waybackjs/s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
37 images 4.1 MB
0 oversized -0 KB
35 legacy format
33 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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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
JS Execution Cost
Action
1236ms total JS execution
REVIEW
1236ms total JS execution
Warning::
https://web-static.archive.org/_static/waybackjs/v...: 586ms CPU time
Warning::
https://web.archive.org/: 303ms CPU time
Info::
Unattributable: 173ms CPU time
Info::
https://web-static.archive.org/_static/waybackjs/m...: 90ms CPU time
Info::
https://archive.org/includes/build/js/archive.min....: 84ms CPU time
Warning::
Third-party scripts: 934ms (76% of total)

Main Thread Breakdown

Script Evaluation 32% Other 29% Rendering 18% Style & Layout 14% Script Parsing & Compilation 6%
ScriptTotalScriptingParse/CompileParty
https://web-static.archive.org/_static/waybackjs/vendors~main.5c55ac5c0b4418a2bfaf.js586ms246ms21ms3rd
https://web.archive.org/303ms6ms2ms1st
Unattributable173ms5ms0ms3rd
https://web-static.archive.org/_static/waybackjs/main.e7b2354c86916e40324f.js90ms85ms5ms3rd
https://archive.org/includes/build/js/archive.min.js?v=dd67c3ca84ms47ms35ms3rd
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
1 fonts (29 KB)
PASS
1 fonts (29 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

29 KB total

Render-blocking

0

of 1

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 2.0 s 2.5 s FCP 2.4 s LCP 2.5 shttps://archive.org/includes/fonts/Iconochive-Regular.woffIconochive-Regular.woff https://archive.org/includes/fonts/Iconochive-Regular.woff — 28.7 KiB — 585 ms — font-display: swap
Iconochive-Regular.woff woff swap
Size 29 KB
Load time 585 ms
Start 1.9 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
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 ~9 KB and ~18 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
Network Waterfall
63 requests over 3231ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 2.4 s LCP 2.5 shttps://web.archive.org// https://web.archive.org/ — 200 — 35.3 KiB — 562 ms — h2https://archive.org/includes/athena.js?v=dd67c3caarchive.org/includes/athena.js?v=dd... https://archive.org/includes/athena.js?v=dd67c3ca — 200 — 6.4 KiB — 859 ms — h2https://archive.org/includes/apollo.js?v=dd67c3caarchive.org/includes/apollo.js?v=dd... https://archive.org/includes/apollo.js?v=dd67c3ca — 200 — 1.7 KiB — 859 ms — h2https://archive.org/components/npm/lit/polyfill-support.js?v=dd67c3caarchive.org/components/npm/lit/poly... https://archive.org/components/npm/lit/polyfill-support.js?v=dd67c3ca — 200 — 2.8 KiB — 857 ms — h2https://archive.org/components/npm/@webcomponents/webcomponentsjs/webcomponents-bundle.js?v=dd67c3caarchive.org/components/npm/@webcomp... https://archive.org/components/npm/@webcomponents/webcomponentsjs/webcomponents-bundle.js?v=dd67c3ca — 200 — 41.7 KiB — 855 ms — h2https://archive.org/includes/build/js/ia-topnav.min.js?v=dd67c3caarchive.org/includes/build/js/ia-to... https://archive.org/includes/build/js/ia-topnav.min.js?v=dd67c3ca — 200 — 5.7 KiB — 830 ms — h2https://archive.org/includes/build/js/archive.min.js?v=dd67c3caarchive.org/includes/build/js/archi... https://archive.org/includes/build/js/archive.min.js?v=dd67c3ca — 200 — 234.7 KiB — 1.1 s — h2https://archive.org/includes/build/css/archive.min.css?v=dd67c3caarchive.org/includes/build/css/arch... https://archive.org/includes/build/css/archive.min.css?v=dd67c3ca — 200 — 57.0 KiB — 733 ms — h2https://web-static.archive.org/_static/css/styles.css?v=HdpcXpRmweb-static.archive.org/_static/css/... https://web-static.archive.org/_static/css/styles.css?v=HdpcXpRm — 200 — 1.8 KiB — 431 ms — h2https://web-static.archive.org/_static/js/ui.js?v=7LYlZ-C2web-static.archive.org/_static/js/u... https://web-static.archive.org/_static/js/ui.js?v=7LYlZ-C2 — 200 — 753 B — 858 ms — 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Monthly Cost $1/mo

These scripts may cost more than they're worth

  • web-static.archive.org adds 586ms and costs ~$8/month

76% 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.

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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

web-static.archive.org takes 586ms 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

52% of web-static.archive.org'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

82% of archive.org'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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