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https://www.railway.app

Performance

· 16 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
70
GRADE
C
FIX
5
REVIEW
1
PASS
8
INFO
2

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

Mobile Desktop
25
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
94
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.
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.

46.86 s

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

62.86 s

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

3.76 s

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.

46.86 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.

67.89 s

Page Load Progression

1.6 s
3.2 s
4.8 s
6.5 s
8.1 s
9.7 s
11.3 s
12.9 s
Checks
16
8 PASS 1 REVIEW 5 FIX
F
Page Weight Budget
Action
12.9 MB transferred, 287 requests
FIX
12.9 MB transferred, 287 requests
Critical::
Page weighs 15.8 MB (12.9 MB transferred)
Warning::
JavaScript is 8.8 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 8.8 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
Info::
CSS is 1.3 MB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 1.3 MB
Info::
Fonts are 610 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 610 KB
Warning::
287 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 2.7 g CO2 per page load
12.9 MB / 2.4 MB budget
12.9 MB transferred
287 requests
2.7 g CO2 per page load
JavaScript 8.8 MiB 68%
Images 2.0 MiB 15%
CSS 1.3 MiB 10%
Fonts 610.2 KiB 5%
HTML 228.5 KiB 2%
Other 8.0 KiB 0%
Other 6.0 KiB 0%
Other 4.9 KiB 0%
Other 752 B 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

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Why this matters

CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.

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
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 (12.9 MiB of 12.9 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
84618ms total JS execution
FIX
84618ms total JS execution
Warning::
https://railway.com/assets/dist-DjHxcH-8.js: 29728ms CPU time
Warning::
https://railway.com/: 18657ms CPU time
Warning::
https://railway.com/assets/use-constant-Bz3v0F0l.j...: 13705ms CPU time
Warning::
https://railway.com/assets/react-dom-CWIgXKDx.js: 7318ms CPU time
Warning::
https://luminaire.railway.com/static/posthog-recor...: 5828ms CPU time
Warning::
Third-party scripts: 84618ms (100% of total)

Main Thread Breakdown

Other 39% Script Evaluation 31% Rendering 18% Style & Layout 9%
ScriptTotalScriptingParse/CompileParty
https://railway.com/assets/dist-DjHxcH-8.js29728ms6515ms0ms3rd
https://railway.com/18657ms36ms9ms3rd
https://railway.com/assets/use-constant-Bz3v0F0l.js13705ms4302ms0ms3rd
https://railway.com/assets/react-dom-CWIgXKDx.js7318ms6336ms1ms3rd
https://luminaire.railway.com/static/posthog-recorder.js?v=1.298.05828ms5084ms36ms3rd
Unattributable3823ms85ms0ms3rd
https://cmp.osano.com/qVHEV4lSSU/738deb1e-f024-459e-ae0a-2e6a0d461ea8/osano.js2679ms1958ms14ms3rd
https://railway.com/assets/useGraphqlClient-81ka45LF.js1815ms1619ms4ms3rd
https://js.stripe.com/v3394ms302ms86ms3rd
https://app.cal.com/embed/embed.js310ms225ms8ms3rd

Showing top 10 of 14 scripts

F
JS Bundles
Action
160 scripts, 4.4 MB unused
FIX
160 scripts, 4.4 MB unused
Warning::
https://railway.com/assets/main-CYn3uDX1.js: 814 KB unused (79%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://railway.com/assets/useGraphqlClient-81ka45...: 690 KB unused (63%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://railway.com/assets/routes-D-7tK16A.js: 492 KB unused (34%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://railway.com/assets/EvolveAndCollaborateAni...: 384 KB unused (52%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://railway.com/assets/ScaleAndGrowAnimation-B...: 292 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 4.4 MB
4460 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://railway.com/assets/main-CYn3uDX1.js1029 KB814 KB (79%)✓3rd
https://railway.com/assets/useGraphqlClient-81ka45LF.js1101 KB690 KB (63%)✓3rd
https://railway.com/assets/routes-D-7tK16A.js1439 KB492 KB (34%)✓3rd
https://railway.com/assets/EvolveAndCollaborateAnimation-ClI2IcT3.js739 KB384 KB (52%)✓3rd
https://railway.com/assets/ScaleAndGrowAnimation-BQp7lj__.js590 KB292 KB (49%)✓3rd
https://railway.com/assets/Icon-3aXoKk-6.js233 KB186 KB (80%)✓3rd
https://railway.com/assets/BuildAndDeployAnimation-CIVJ2bJZ.js373 KB186 KB (50%)✓3rd
https://railway.com/assets/MonitorAndObserveAnimation-CdvyTusy.js312 KB155 KB (50%)✓3rd
https://railway.com/assets/sdk-C0W_W8OK.js413 KB153 KB (37%)✓3rd
https://js.stripe.com/v3220 KB145 KB (66%)✓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

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
51 images, 0 KB saveable
REVIEW
51 images, 0 KB saveable
Warning::
https://railway.com/landing-2/logos/comp/logo-ngin... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://railway.com/landing-2/logos/comp/logo-hapr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://railway.com/landing-2/logos/comp/logo-kube... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://railway.com/landing-2/logos/comp/logo-envo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://railway.com/landing-2/logos/comp/logo-amaz... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://railway.com/landing-2/logos/comp/logo-bett... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://railway.com/landing-2/logos/comp/logo-sent... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://railway.com/landing-2/logos/comp/logo-dock... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://railway.com/landing-2/logos/comp/logo-terr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://railway.com/landing-2/trains/station-floor... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://railway.com/secret-landing/trust/logo-mapp... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://railway.com/landing-2/logos/comp/logo-helm... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://railway.com/landing-2/logos/comp/logo-cili... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://railway.com/landing-2/logos/comp/logo-noma... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://railway.com/landing-2/logos/comp/logo-open... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://railway.com/landing-2/logos/comp/logo-hero... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://railway.com/landing-2/logos/comp/logo-data... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://railway.com/landing-2/logos/comp/logo-spac... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://railway.com/landing-2/logos/comp/logo-isti... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://railway.com/secret-landing/trust/logo-g2x.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://railway.com/landing-2/logos/comp/logo-digi... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://railway.com/landing-2/logos/comp/logo-clou... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://railway.com/secret-landing/trust/logo-bilt... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
51 images 2.0 MB
0 oversized -0 KB
36 legacy format
23 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

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
10 fonts (610 KB)
PASS
10 fonts (610 KB)
Info::
10 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

10

610 KB total

Render-blocking

0

of 10

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s 28.0 s 30.0 s 32.0 s 34.0 s 36.0 s 38.0 s 40.0 s 42.0 s 44.0 s 46.0 s 48.0 s 50.0 s 52.0 s 54.0 s 56.0 s 58.0 s 60.0 s 62.0 s 64.0 s 66.0 s FCP 46.9 s LCP 62.9 shttps://fonts.gstatic.com/s/ibmplexserif/v19/jizDREVNn1dOx-zrZ2X3pZvkTiUQ6SF-lPKgqWVL.woff2jizDREVNn1dOx-zrZ2X3pZv... https://fonts.gstatic.com/s/ibmplexserif/v19/jizDREVNn1dOx-zrZ2X3pZvkTiUQ6SF-lPKgqWVL.woff2 — 19 B — 0 ms — font-display: swapdata:font/woff2;base64,d09GMgABAAAAAZ6cAA0AAAAEviAAAZ4+AAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGogMG4TcKByB…woff2;base64,d09GMgABAA... data:font/woff2;base64,d09GMgABAAAAAZ6cAA0AAAAEviAAAZ4+AAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGogMG4TcKByB… — 103.7 KiB — 0 ms — font-display: swapdata:font/woff2;base64,d09GMgABAAAAAZ3EAA0AAAAEu6QAAZ1lAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGogMG4TachyB…woff2;base64,d09GMgABAA... data:font/woff2;base64,d09GMgABAAAAAZ3EAA0AAAAEu6QAAZ1lAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGogMG4TachyB… — 103.4 KiB — 0 ms — font-display: swapdata:font/woff2;base64,d09GMgABAAAAAYI0AA0AAAAEnsgAAYHWAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGogMG4SmRhyB…woff2;base64,d09GMgABAA... data:font/woff2;base64,d09GMgABAAAAAYI0AA0AAAAEnsgAAYHWAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGogMG4SmRhyB… — 96.6 KiB — 0 ms — font-display: swapdata:font/woff2;base64,d09GMgABAAAAAZ1MAA0AAAAEvUAAAZzvAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGogMG4TcQByB…woff2;base64,d09GMgABAA... data:font/woff2;base64,d09GMgABAAAAAZ1MAA0AAAAEvUAAAZzvAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGogMG4TcQByB… — 103.3 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/ibmplexserif/v20/jizAREVNn1dOx-zrZ2X3pZvkTi3s-CI0q1vjitOh.woff2jizAREVNn1dOx-zrZ2X3pZv... https://fonts.gstatic.com/s/ibmplexserif/v20/jizAREVNn1dOx-zrZ2X3pZvkTi3s-CI0q1vjitOh.woff2 — 15.2 KiB — 0 ms — font-display: swapdata:font/woff2;base64,d09GMgABAAAAAWgEABEAAAAELewAAWeeAAJN0wAAAAAAAAAAAAAAAAAAAAAAAAAAGoQqG8cWHIHE…woff2;base64,d09GMgABAA... data:font/woff2;base64,d09GMgABAAAAAWgEABEAAAAELewAAWeeAAJN0wAAAAAAAAAAAAAAAAAAAAAAAAAAGoQqG8cWHIHE… — 90.0 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/ibmplexserif/v20/jizDREVNn1dOx-zrZ2X3pZvkTiUf2zcZiVbJ.woff2jizDREVNn1dOx-zrZ2X3pZv... https://fonts.gstatic.com/s/ibmplexserif/v20/jizDREVNn1dOx-zrZ2X3pZvkTiUf2zcZiVbJ.woff2 — 14.6 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/intertight/v9/NGSwv5HMAFg6IuGlBNMjxLsH8ahuQ2e8.woff2NGSwv5HMAFg6IuGlBNMjxLs... https://fonts.gstatic.com/s/intertight/v9/NGSwv5HMAFg6IuGlBNMjxLsH8ahuQ2e8.woff2 — 43.9 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/jetbrainsmono/v24/tDbV2o-flEEny0FZhsfKu5WU4xD7OwGtT0rU.woff2tDbV2o-flEEny0FZhsfKu5W... https://fonts.gstatic.com/s/jetbrainsmono/v24/tDbV2o-flEEny0FZhsfKu5WU4xD7OwGtT0rU.woff2 — 39.6 KiB — 0 ms — font-display: swap
jizDREVNn1dOx-zrZ2X3pZv... woff2 swap
Size 0 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
woff2;base64,d09GMgABAA... woff2 swap
Size 104 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
woff2;base64,d09GMgABAA... woff2 swap
Size 103 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
woff2;base64,d09GMgABAA... woff2 swap
Size 97 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
woff2;base64,d09GMgABAA... woff2 swap
Size 103 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
jizAREVNn1dOx-zrZ2X3pZv... woff2 swap
Size 15 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
woff2;base64,d09GMgABAA... woff2 swap
Size 90 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
jizDREVNn1dOx-zrZ2X3pZv... woff2 swap
Size 15 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
NGSwv5HMAFg6IuGlBNMjxLs... woff2 swap
Size 44 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
tDbV2o-flEEny0FZhsfKu5W... woff2 swap
Size 40 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 ~155 KB and ~310 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
2 hints, 0 missing preconnects
PASS
2 hints, 0 missing preconnects
Info::
Page uses 2 resource hint(s)

Current Resource Hints

preconnect
—
preload
1
dns-prefetch
1
prefetch
—

2 resource hints configured

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+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall
287 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 84618ms · 3999KB · €1353/mo
railway.com
Other
Costly
Execution 29728ms
Transfer 101 KB
Unused 44%
Monthly Cost €475/mo
railway.com
Other
Costly
Execution 18657ms
Transfer 225 KB
Monthly Cost €298/mo
railway.com
Other
Costly
Execution 13705ms
Transfer 5 KB
Monthly Cost €219/mo
railway.com
Other
Costly
Execution 7318ms
Transfer 130 KB
Unused 21%
Monthly Cost €117/mo
luminaire.railway.com
Other
Costly
Execution 5828ms
Transfer 88 KB
Unused 60%
Monthly Cost €93/mo
Unattributable
Other
Costly
Execution 3823ms
Transfer 0 KB
Monthly Cost €61/mo
cmp.osano.com
Other
Costly
Execution 2679ms
Transfer 41 KB
Monthly Cost €43/mo
railway.com
Other
Costly
Execution 1815ms
Transfer 1101 KB
Unused 63%
Monthly Cost €29/mo
Stripe
Payment
Essential
Execution 394ms
Transfer 220 KB
Unused 66%
Monthly Cost €6/mo
app.cal.com
Other
Costly
Execution 310ms
Transfer 23 KB
Monthly Cost €5/mo
railway.com
Other
Optional
Execution 138ms
Transfer 1001 KB
Monthly Cost €2/mo
railway.com
Other
Optional
Execution 84ms
Transfer 739 KB
Unused 52%
Monthly Cost €1/mo
railway.com
Other
Optional
Execution 78ms
Transfer 295 KB
Monthly Cost €1/mo
cmp.osano.com
Other
Optional
Execution 60ms
Transfer 31 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • railway.com adds 29728ms and costs ~€475/month
  • railway.com adds 18657ms and costs ~€298/month
  • railway.com adds 13705ms and costs ~€219/month
  • railway.com adds 7318ms and costs ~€117/month
  • luminaire.railway.com adds 5828ms and costs ~€93/month
  • Unattributable adds 3823ms and costs ~€61/month
  • cmp.osano.com adds 2679ms and costs ~€43/month
  • railway.com adds 1815ms and costs ~€29/month
  • app.cal.com adds 310ms and costs ~€5/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

railway.com takes 29728ms 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

railway.com takes 18657ms 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

railway.com takes 13705ms 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

railway.com takes 7318ms 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

luminaire.railway.com takes 5828ms 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

60% of luminaire.railway.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

Unattributable takes 3823ms 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

cmp.osano.com takes 2679ms 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

railway.com takes 1815ms 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

63% of railway.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

66% of Stripe'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

app.cal.com takes 310ms 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 railway.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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