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https://nameshift.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
89
GRADE
B
FIX
1
REVIEW
2
PASS
10
INFO
2

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

Mobile Desktop
100
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
97
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.

285 ms

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

700 ms

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

14 ms

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

0.001

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

487 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.

1.29 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
10 PASS 2 REVIEW 1 FIX
D
Third-Party Impact
Action
64% third-party, 0 ms blocking
FIX
64% third-party, 0 ms blocking
Warning::
Third-party code accounts for 64% of page weight (263.8 KiB of 414.5 KiB)
Info::
Third-party blocking time is low (0 ms)
36%
64%
First-party Third-party
B
JS Bundles
5 scripts, 66 KB unused
REVIEW
5 scripts, 66 KB unused
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-NNN...: 66 KB unused (55%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 66 KB
66 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtm.js?id=GTM-NNNRWNT7120 KB66 KB (55%)✓3rd
https://nameshift.com/_astro/page.CwgqyIIj.js1 KB—✓1st
https://client.crisp.chat/l.js3 KB—✓3rd
https://consent.cookiebot.com/uc.js?cbid=b3d220b4-8cf7-4e49-b38a-965e9d86327e&implementation=gtm&consentmode-dataredaction=dynamic27 KB—✓3rd
https://consent.cookiebot.com/b3d220b4-8cf7-4e49-b38a-965e9d86327e/cc.js?renew=false&referer=nameshift.com&dnt=false&init=false78 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
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+
Page Weight Budget
415 KB transferred, 18 requests
PASS
415 KB transferred, 18 requests
Info::
Page weighs 1.1 MB (415 KB transferred)
Info::
18 HTTP requests
Info::
Estimated 0.08 g CO2 per page load
415 KB / 2.4 MB budget
415 KB transferred
18 requests
0.08 g CO2 per page load
JavaScript 229.6 KiB 55%
Fonts 118.5 KiB 29%
Images 46.4 KiB 11%
CSS 11.1 KiB 3%
HTML 7.6 KiB 2%
Other 996 B 0%
Other 438 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
Image Optimization
4 images, 0 KB saveable
PASS
4 images, 0 KB saveable
Warning::
https://nameshift.com/img/clouds.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
4 images 46 KB
0 oversized -0 KB
2 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

A+
JS Execution Cost
465ms total JS execution
PASS
465ms total JS execution
Info::
https://nameshift.com/en-gb: 194ms CPU time
Info::
https://consent.cookiebot.com/b3d220b4-8cf7-4e49-b...: 135ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-NNN...: 76ms CPU time
Info::
Unattributable: 59ms CPU time
Warning::
Third-party scripts: 271ms (58% of total)

Main Thread Breakdown

Script Evaluation 32% Style & Layout 29% Other 15% Parse HTML & CSS 11% Script Parsing & Compilation 9% Rendering 4%
ScriptTotalScriptingParse/CompileParty
https://nameshift.com/en-gb194ms7ms1ms1st
https://consent.cookiebot.com/b3d220b4-8cf7-4e49-b38a-965e9d86327e/cc.js?renew=false&referer=nameshift.com&dnt=false&init=false135ms57ms21ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-NNNRWNT776ms53ms20ms3rd
Unattributable59ms3ms0ms3rd
A+
Font Loading
3 fonts (118 KB)
PASS
3 fonts (118 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

118 KB total

Render-blocking

0

of 3

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 285 ms LCP 700 mshttps://nameshift.com/_astro/open-sans-latin-wght-normal.CYuRH5ug.woff2open-sans-latin-wght-no... https://nameshift.com/_astro/open-sans-latin-wght-normal.CYuRH5ug.woff2 — 47.4 KiB — 12 ms — font-display: swaphttps://nameshift.com/_astro/open-sans-symbols-wght-normal.C2QAFfGS.woff2open-sans-symbols-wght-... https://nameshift.com/_astro/open-sans-symbols-wght-normal.C2QAFfGS.woff2 — 24.7 KiB — 10 ms — font-display: swaphttps://nameshift.com/_astro/open-sans-math-wght-normal.cwLdES2L.woff2open-sans-math-wght-nor... https://nameshift.com/_astro/open-sans-math-wght-normal.cwLdES2L.woff2 — 46.3 KiB — 10 ms — font-display: swap
open-sans-latin-wght-no... woff2 swap
Size 47 KB
Load time 12 ms
Start 115 ms
Risk FOUT — text flashes from fallback to web font
open-sans-symbols-wght-... woff2 swap
Size 25 KB
Load time 10 ms
Start 207 ms
Risk FOUT — text flashes from fallback to web font
open-sans-math-wght-nor... woff2 swap
Size 46 KB
Load time 10 ms
Start 263 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
Page Weight Inventory
18 resources · 415 KB · 66 KB savings available
PASS
18 resources · 415 KB · 66 KB savings available
Info::
Within 1MB page-weight target
Got: 415 KB
Info::
~66 KB of savings available
Warning::
8 third-party resources (64% of weight)
18 resources · 414.5 KiB · 8 third-party Within 1MB page-weight target
JavaScript 55% · 229.6 KiB
Font 29% · 118.5 KiB
Image 11% · 46.4 KiB
CSS 3% · 11.1 KiB
Document 2% · 8.0 KiB
Other 0% · 996 B

~65.5 KiB of savings available

Remove unused JavaScript: 65.5 KiB
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Quis Lab (Plushie App)

Network Waterfall
18 requests over 724ms
INFO
0 ms 200 ms 400 ms 600 ms FCP 285 ms LCP 700 mshttps://nameshift.com// https://nameshift.com/ — 302 — 438 B — 40 ms — h2https://nameshift.com/en-gb/en-gb https://nameshift.com/en-gb — 200 — 6.8 KiB — 6 ms — h2https://nameshift.com/_astro/index.rDuqCp1-.css/_astro/index.rDuqCp1-.css https://nameshift.com/_astro/index.rDuqCp1-.css — 200 — 11.1 KiB — 14 ms — h3https://nameshift.com/_astro/page.CwgqyIIj.js/_astro/page.CwgqyIIj.js https://nameshift.com/_astro/page.CwgqyIIj.js — 200 — 1.2 KiB — 23 ms — h3https://nameshift.com/img/icon.png/img/icon.png https://nameshift.com/img/icon.png — 200 — 7.1 KiB — 21 ms — h3https://nameshift.imgix.net/1600x2160/9f1123de4a/home-drawing.png?fm=avif&w=645nameshift.imgix.net/1600x2160/9f112... https://nameshift.imgix.net/1600x2160/9f1123de4a/home-drawing.png?fm=avif&w=645 — 200 — 33.7 KiB — 36 ms — h2https://nameshift.com/img/clouds.png/img/clouds.png https://nameshift.com/img/clouds.png — 200 — 5.7 KiB — 20 ms — h3https://client.crisp.chat/l.jsclient.crisp.chat/l.js https://client.crisp.chat/l.js — 200 — 3.2 KiB — 35 ms — h3https://www.googletagmanager.com/gtm.js?id=GTM-NNNRWNT7www.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-NNNRWNT7 — 200 — 120.3 KiB — 39 ms — h2https://nameshift.com/_astro/open-sans-latin-wght-normal.CYuRH5ug.woff2/_astro/open-sans-latin-wght-normal... https://nameshift.com/_astro/open-sans-latin-wght-normal.CYuRH5ug.woff2 — 200 — 47.4 KiB — 12 ms — h3https://nameshift.com/_astro/open-sans-symbols-wght-normal.C2QAFfGS.woff2/_astro/open-sans-symbols-wght-norm... https://nameshift.com/_astro/open-sans-symbols-wght-normal.C2QAFfGS.woff2 — 200 — 24.7 KiB — 10 ms — h3https://nameshift.com/_astro/open-sans-math-wght-normal.cwLdES2L.woff2/_astro/open-sans-math-wght-normal.... https://nameshift.com/_astro/open-sans-math-wght-normal.cwLdES2L.woff2 — 200 — 46.3 KiB — 10 ms — h3https://consent.cookiebot.com/uc.js?cbid=b3d220b4-8cf7-4e49-b38a-965e9d86327e&implementation=gtm&consentmode-dataredaction=dynamicconsent.cookiebot.com/uc.js?cbid=b3... https://consent.cookiebot.com/uc.js?cbid=b3d220b4-8cf7-4e49-b38a-965e9d86327e&implementation=gtm&consentmode-dataredaction=dynamic — 200 — 27.0 KiB — 33 ms — h2https://nameshift.com/img/icon.png/img/icon.png https://nameshift.com/img/icon.png — 200 — 0 B — 4 ms — h3https://consentcdn.cookiebot.com/consentconfig/b3d220b4-8cf7-4e49-b38a-965e9d86327e/settings.jsonconsentcdn.cookiebot.com/consentcon... https://consentcdn.cookiebot.com/consentconfig/b3d220b4-8cf7-4e49-b38a-965e9d86327e/settings.json — 200 — 996 B — 26 ms — h2https://consent.cookiebot.com/b3d220b4-8cf7-4e49-b38a-965e9d86327e/cc.js?renew=false&referer=nameshift.com&dnt=false&init=falseconsent.cookiebot.com/b3d220b4-8cf7... https://consent.cookiebot.com/b3d220b4-8cf7-4e49-b38a-965e9d86327e/cc.js?renew=false&referer=nameshift.com&dnt=false&init=false — 200 — 77.8 KiB — 156 ms — h2https://consentcdn.cookiebot.com/sdk/bc-v4.min.htmlconsentcdn.cookiebot.com/sdk/bc-v4.... https://consentcdn.cookiebot.com/sdk/bc-v4.min.html — 200 — 809 B — 18 ms — h2data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABIAAAASCAYAAABWzo5XAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAA…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABIAAAASCAYAAABWzo5XAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAA… — 200 — 0 B — 0 ms — data
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
58% of JavaScript execution is third-party
First-party Third-party 271ms · 198KB · €3/mo
consent.cookiebot.com
Other
Optional
Execution 135ms
Transfer 78 KB
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 76ms
Transfer 120 KB
Unused 55%
Monthly Cost €1/mo
Unattributable
Other
Optional
Execution 59ms
Transfer 0 KB
Monthly Cost €1/mo

58% 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

55% of Google Tag Manager'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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