Skip to content
https://www.sentry.io

Performance

· 16 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
82
GRADE
B
FIX
2
REVIEW
3
PASS
9
INFO
2

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

Mobile Desktop
0
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
89
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.

4.06 s

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

0 ms

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

0 ms

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

0.000

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

6.09 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.

0 ms

Page Load Progression

616 ms
1.2 s
1.8 s
2.5 s
3.1 s
3.7 s
4.3 s
4.9 s
Checks
16
9 PASS 3 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 (1.7 MiB of 1.7 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
7698ms total JS execution
FIX
7698ms total JS execution
Warning::
https://sentry.io/_astro/Welcome.astro_astro_type_...: 5771ms CPU time
Warning::
Unattributable: 998ms CPU time
Warning::
https://sentry.io/welcome/: 446ms CPU time
Warning::
https://plausible.io/js/script.tagged-events.js: 363ms CPU time
Info::
https://sentry.io/_astro/link-decorator.BP7leAsv.j...: 120ms CPU time
Warning::
Third-party scripts: 7698ms (100% of total)

Main Thread Breakdown

Other 49% Script Evaluation 40% Style & Layout 7%
ScriptTotalScriptingParse/CompileParty
https://sentry.io/_astro/Welcome.astro_astro_type_script_index_0_lang.B_M3jXhV.js5771ms2570ms1ms3rd
Unattributable998ms378ms0ms3rd
https://sentry.io/welcome/446ms124ms22ms3rd
https://plausible.io/js/script.tagged-events.js363ms21ms1ms3rd
https://sentry.io/_astro/link-decorator.BP7leAsv.js120ms2ms0ms3rd
C
Page Weight Budget
Action
1.7 MB transferred, 51 requests
REVIEW
1.7 MB transferred, 51 requests
Info::
Page weighs 3.3 MB (1.7 MB transferred)
Info::
51 HTTP requests
Info::
Estimated 0.36 g CO2 per page load
1.7 MB / 2.4 MB budget
1.7 MB transferred
51 requests
0.36 g CO2 per page load
Images 697.3 KiB 39%
Other 662.2 KiB 37%
HTML 166.8 KiB 9%
JavaScript 110.0 KiB 6%
Fonts 103.7 KiB 6%
CSS 30.8 KiB 2%
Other 8.5 KiB 0%
Other 140 B 0%
0 2.4 MB 4.9 MB
Approaching limit
C
Image Optimization
Action
22 images, 0 KB saveable
REVIEW
22 images, 0 KB saveable
Warning::
https://sentry.io/_astro/getting-started-img-right... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://sentry.io/_astro/getting-started-img-left.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://sentry.io/_astro/ufo-abduction-image.CCCwe... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
22 images 697 KB
0 oversized -0 KB
11 legacy format
3 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

B
HTTP Caching
private
REVIEW
private
Info::
Cache-Control header is set
Got: private
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

private

DirectiveValueMeaning
private—Only browser cache, not CDN/proxy
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
6 fonts (104 KB)
PASS
6 fonts (104 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

6

104 KB total

Render-blocking

0

of 6

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 4.0 s FCP 4.1 shttps://sentry.io/astro-assets/fonts/rubik-latin-regular.woffrubik-latin-regular.woff https://sentry.io/astro-assets/fonts/rubik-latin-regular.woff — 23.4 KiB — 0 ms — font-display: swaphttps://sentry.io/astro-assets/fonts/rubik-latin-italic.woff2rubik-latin-italic.woff2 https://sentry.io/astro-assets/fonts/rubik-latin-italic.woff2 — 17.7 KiB — 0 ms — font-display: swaphttps://sentry.io/astro-assets/fonts/dammitsansv0.2-bold.otfdammitsansv0.2-bold.otf https://sentry.io/astro-assets/fonts/dammitsansv0.2-bold.otf — 8.2 KiB — 0 ms — font-display: swaphttps://sentry.io/astro-assets/fonts/rubik-latin-regular.woff2rubik-latin-regular.woff2 https://sentry.io/astro-assets/fonts/rubik-latin-regular.woff2 — 18.3 KiB — 0 ms — font-display: swaphttps://sentry.io/astro-assets/fonts/rubik-latin-500.woff2rubik-latin-500.woff2 https://sentry.io/astro-assets/fonts/rubik-latin-500.woff2 — 18.4 KiB — 0 ms — font-display: swaphttps://sentry.io/astro-assets/fonts/rubik-latin-500italic.woff2rubik-latin-500italic.w... https://sentry.io/astro-assets/fonts/rubik-latin-500italic.woff2 — 17.8 KiB — 0 ms — font-display: swap
rubik-latin-regular.woff woff swap
Size 23 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
rubik-latin-italic.woff2 woff2 swap
Size 18 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
dammitsansv0.2-bold.otf otf swap
Size 8 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
rubik-latin-regular.woff2 woff2 swap
Size 18 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
rubik-latin-500.woff2 woff2 swap
Size 18 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
rubik-latin-500italic.w... woff2 swap
Size 18 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 ~9 KB and ~18 ms

A+
JS Bundles
12 scripts, 0 KB unused
PASS
12 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://plausible.io/js/script.tagged-events.js2 KB—✓3rd
https://sentry.io/_astro/Link.astro_astro_type_script_index_0_lang.B5kEYiND.js0 KB—✓3rd
https://sentry.io/_astro/GettingStarted.astro_astro_type_script_index_0_lang.BTWxF49p.js0 KB—✓3rd
https://sentry.io/_astro/Welcome.astro_astro_type_script_index_0_lang.B_M3jXhV.js45 KB—✓3rd
https://sentry.io/_astro/MarketoForm.CKHgLosH.js5 KB—✓3rd
https://sentry.io/_astro/client.B8WkP7Ly.js1 KB—✓3rd
https://sentry.io/_astro/link-decorator.BP7leAsv.js3 KB—✓3rd
https://sentry.io/_astro/jsx-runtime.9DypCmAh.js1 KB—✓3rd
https://sentry.io/_astro/index.eCxJ45ll.js3 KB—✓3rd
https://sentry.io/_astro/_slug_.d55d3e77.B7luF8nJ.js1 KB—✓3rd
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
6 hints, 0 missing preconnects
PASS
6 hints, 0 missing preconnects
Info::
Page uses 6 resource hint(s)

Current Resource Hints

preconnect
—
preload
5
dns-prefetch
1
prefetch
—

6 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: Google Cloud

Network Waterfall
51 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 7698ms · 218KB · $133/mo
sentry.io
Other
Costly
Execution 5771ms
Transfer 45 KB
Monthly Cost $100/mo
Unattributable
Other
Costly
Execution 998ms
Transfer 0 KB
Monthly Cost $17/mo
sentry.io
Other
Costly
Execution 446ms
Transfer 167 KB
Monthly Cost $8/mo
Plausible Analytics
Analytics
Costly
Execution 363ms
Transfer 2 KB
Monthly Cost $6/mo
sentry.io
Other
Optional
Execution 120ms
Transfer 3 KB
Monthly Cost $2/mo

These scripts may cost more than they're worth

  • sentry.io adds 5771ms and costs ~$100/month
  • Unattributable adds 998ms and costs ~$17/month
  • sentry.io adds 446ms and costs ~$8/month
  • Plausible Analytics adds 363ms and costs ~$6/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

sentry.io takes 5771ms 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

Unattributable takes 998ms 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

sentry.io takes 446ms 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

Plausible Analytics takes 363ms 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

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.

Send Feedback