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https://envoyer.io

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
86
GRADE
B
FIX
0
REVIEW
5
PASS
8
INFO
2

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

Mobile Desktop
97
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.
100
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.

475 ms

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

1.27 s

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

47 ms

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

0.013

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

522 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

1.30 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
15
8 PASS 5 REVIEW
B
Third-Party Impact
47% third-party, 0 ms blocking
REVIEW
47% third-party, 0 ms blocking
Info::
Third-party code accounts for 47% of page weight (416.8 KiB of 887.5 KiB)
Info::
Third-party blocking time is low (0 ms)
53%
47%
First-party Third-party
C
Image Optimization
Action
13 images, 0 KB saveable
REVIEW
13 images, 0 KB saveable
Warning::
https://envoyer.io/img/teams.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://envoyer.io/img/discord.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://envoyer.io/img/check.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://envoyer.io/img/github.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://envoyer.io/img/bitbucket.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://envoyer.io/img/slack.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://envoyer.io/img/check-black.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://envoyer.io/img/check-white.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://envoyer.io/img/envoyer.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://envoyer.io/img/play.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://envoyer.io/img/app.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://envoyer.io/img/gitlab.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
13 images 457 KB
0 oversized -0 KB
13 legacy format
12 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

C
JS Bundles
Action
2 scripts, 238 KB unused
REVIEW
2 scripts, 238 KB unused
Warning::
https://chat.cdn-plain.com/index.js: 238 KB unused (62%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 238 KB
238 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://chat.cdn-plain.com/index.js388 KB238 KB (62%)✓3rd
https://cdn.usefathom.com/script.js3 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

B
Page Weight Inventory
28 resources · 888 KB · 238 KB savings available
REVIEW
28 resources · 888 KB · 238 KB savings available
Info::
Within 1MB page-weight target
Got: 888 KB
Info::
~238 KB of savings available
Warning::
12 third-party resources (47% of weight)
Info::
2 resources over 200KB
28 resources · 887.5 KiB · 12 third-party Within 1MB page-weight target
Image 52% · 461.2 KiB
JavaScript 44% · 391.0 KiB
Font 3% · 23.6 KiB
CSS 1% · 5.5 KiB
Document 1% · 4.8 KiB
Other 0% · 1.4 KiB

~237.8 KiB of savings available

Remove unused JavaScript: 237.8 KiB
B
HTTP Caching
no-cache, private
REVIEW
no-cache, private
Info::
Cache-Control header is set
Got: no-cache, private
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

no-cache, private

DirectiveValueMeaning
no-cache—Cache but always revalidate first
private—Only browser cache, not CDN/proxy
A
Page Weight Budget
888 KB transferred, 28 requests
PASS
888 KB transferred, 28 requests
Info::
Page weighs 1.7 MB (888 KB transferred)
Info::
28 HTTP requests
Info::
Estimated 0.18 g CO2 per page load
888 KB / 2.4 MB budget
888 KB transferred
28 requests
0.18 g CO2 per page load
Images 457.3 KiB 52%
JavaScript 391.0 KiB 44%
Fonts 23.6 KiB 3%
CSS 5.5 KiB 1%
HTML 4.8 KiB 1%
Other 3.8 KiB 0%
Other 775 B 0%
Other 700 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Under budget
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+
JS Execution Cost
446ms total JS execution
PASS
446ms total JS execution
Info::
https://envoyer.io/: 230ms CPU time
Info::
https://chat.cdn-plain.com/index.js: 130ms CPU time
Info::
Unattributable: 85ms CPU time
Info::
Third-party scripts: 216ms (48% of total)

Main Thread Breakdown

Other 43% Script Evaluation 20% Style & Layout 16% Script Parsing & Compilation 14% Rendering 5%
ScriptTotalScriptingParse/CompileParty
https://envoyer.io/230ms16ms1ms1st
https://chat.cdn-plain.com/index.js130ms64ms65ms3rd
Unattributable85ms3ms0ms3rd
A+
Font Loading
2 fonts (24 KB)
PASS
2 fonts (24 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

24 KB total

Render-blocking

0

of 2

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 475 ms LCP 1.3 shttps://fonts.bunny.net/figtree/files/figtree-latin-400-normal.woff2figtree-latin-400-norma... https://fonts.bunny.net/figtree/files/figtree-latin-400-normal.woff2 — 11.8 KiB — 21 ms — font-display: swaphttps://fonts.bunny.net/figtree/files/figtree-latin-700-normal.woff2figtree-latin-700-norma... https://fonts.bunny.net/figtree/files/figtree-latin-700-normal.woff2 — 11.8 KiB — 21 ms — font-display: swap
figtree-latin-400-norma... woff2 swap
Size 12 KB
Load time 21 ms
Start 283 ms
Risk FOUT — text flashes from fallback to web font
figtree-latin-700-norma... woff2 swap
Size 12 KB
Load time 21 ms
Start 285 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+
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
28 requests over 1739ms
INFO
0 ms 500 ms 1.0 s 1.5 s FCP 475 ms LCP 1.3 shttps://envoyer.io// https://envoyer.io/ — 200 — 4.8 KiB — 119 ms — h2https://cdn.usefathom.com/script.jscdn.usefathom.com/script.js https://cdn.usefathom.com/script.js — 200 — 2.7 KiB — 31 ms — h2https://envoyer.io/css/marketing.css?id=006b23b2ed34e0b4dd250626a05df545/css/marketing.css?id=006b23b2ed34e... https://envoyer.io/css/marketing.css?id=006b23b2ed34e0b4dd250626a05df545 — 200 — 4.4 KiB — 20 ms — h2https://envoyer.io/img/envoyer.svg/img/envoyer.svg https://envoyer.io/img/envoyer.svg — 200 — 2.6 KiB — 17 ms — h2https://envoyer.io/img/play.svg/img/play.svg https://envoyer.io/img/play.svg — 200 — 758 B — 22 ms — h2https://envoyer.io/img/app.png/img/app.png https://envoyer.io/img/app.png — 200 — 424.6 KiB — 47 ms — h2https://envoyer.io/img/check.svg/img/check.svg https://envoyer.io/img/check.svg — 200 — 622 B — 16 ms — h2https://envoyer.io/img/github.svg/img/github.svg https://envoyer.io/img/github.svg — 200 — 1.8 KiB — 38 ms — h2https://envoyer.io/img/bitbucket.svg/img/bitbucket.svg https://envoyer.io/img/bitbucket.svg — 200 — 2.3 KiB — 38 ms — h2https://envoyer.io/img/gitlab.svg/img/gitlab.svg https://envoyer.io/img/gitlab.svg — 200 — 1.5 KiB — 40 ms — h2https://envoyer.io/img/slack.svg/img/slack.svg https://envoyer.io/img/slack.svg — 200 — 1.5 KiB — 40 ms — h2https://envoyer.io/img/teams.png/img/teams.png https://envoyer.io/img/teams.png — 200 — 9.8 KiB — 40 ms — h2https://envoyer.io/img/discord.png/img/discord.png https://envoyer.io/img/discord.png — 200 — 10.6 KiB — 42 ms — h2https://envoyer.io/img/check-black.svg/img/check-black.svg https://envoyer.io/img/check-black.svg — 200 — 481 B — 41 ms — h2https://envoyer.io/img/check-white.svg/img/check-white.svg https://envoyer.io/img/check-white.svg — 200 — 479 B — 41 ms — h2https://envoyer.io/img/favicons/site.webmanifest/img/favicons/site.webmanifest https://envoyer.io/img/favicons/site.webmanifest — 200 — 775 B — 111 ms — h2https://fonts.bunny.net/css2?family=Figtree:wght@400;600;700;800&display=swapfonts.bunny.net/css2?family=Figtree... https://fonts.bunny.net/css2?family=Figtree:wght@400;600;700;800&display=swap — 200 — 1.1 KiB — 86 ms — h2https://chat.cdn-plain.com/index.jschat.cdn-plain.com/index.js https://chat.cdn-plain.com/index.js — 200 — 388.3 KiB — 64 ms — h3https://fonts.bunny.net/figtree/files/figtree-latin-400-normal.woff2fonts.bunny.net/figtree/files/figtr... https://fonts.bunny.net/figtree/files/figtree-latin-400-normal.woff2 — 200 — 11.8 KiB — 21 ms — h2https://fonts.bunny.net/figtree/files/figtree-latin-700-normal.woff2fonts.bunny.net/figtree/files/figtr... https://fonts.bunny.net/figtree/files/figtree-latin-700-normal.woff2 — 200 — 11.8 KiB — 21 ms — h2https://cdn.usefathom.com/?h=https%3A%2F%2Fenvoyer.io&p=%2F&r=&sid=TCPMSNPJ&qs=%7B%7D&cid=41173812cdn.usefathom.com/?h=https%3A%2F%2F... https://cdn.usefathom.com/?h=https%3A%2F%2Fenvoyer.io&p=%2F&r=&sid=TCPMSNPJ&qs=%7B%7D&cid=41173812 — 200 — 433 B — 138 ms — h2https://chat.uk.plain.com/chat/createSessionchat.uk.plain.com/chat/createSessio... https://chat.uk.plain.com/chat/createSession — 204 — 0 B — 186 ms — h2https://envoyer.io/img/favicons/favicon.ico/img/favicons/favicon.ico https://envoyer.io/img/favicons/favicon.ico — 200 — 3.8 KiB — 13 ms — h2https://chat.uk.plain.com/chat/createSessionchat.uk.plain.com/chat/createSessio... https://chat.uk.plain.com/chat/createSession — 200 — 227 B — 184 ms — h2https://chat.uk.plain.com/chat/getChatAppchat.uk.plain.com/chat/getChatApp https://chat.uk.plain.com/chat/getChatApp — 204 — 0 B — 156 ms — h2https://chat.uk.plain.com/chat/getChatAppchat.uk.plain.com/chat/getChatApp https://chat.uk.plain.com/chat/getChatApp — 200 — 323 B — 248 ms — h2https://chat.uk.plain.com/chat/getUnreadMessageschat.uk.plain.com/chat/getUnreadMes... https://chat.uk.plain.com/chat/getUnreadMessages — 204 — 0 B — 166 ms — h2https://chat.uk.plain.com/chat/getUnreadMessageschat.uk.plain.com/chat/getUnreadMes... https://chat.uk.plain.com/chat/getUnreadMessages — 200 — 150 B — 191 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
48% of JavaScript execution is third-party
First-party Third-party 216ms · 388KB · $3/mo
chat.cdn-plain.com
Other
Optional
Execution 130ms
Transfer 388 KB
Unused 62%
Monthly Cost $2/mo
Unattributable
Other
Optional
Execution 85ms
Transfer 0 KB
Monthly Cost $1/mo

48% 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

62% of chat.cdn-plain.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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