Performance
· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
4.92 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
6.28 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
414 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.
4.92 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.
10.91 s
Page Load Progression
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BPage Weight Budget1.2 MB transferred, 65 requestsREVIEW
Subset fonts to include only used characters, or switch to system font stacks.
Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).
Source: web.dev font loading
CImage OptimizationAction22 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
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.
Performance issues directly impact user engagement and conversion rates.
CJS Execution CostAction1909ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://fr.site123.com/ | 521ms | 31ms | 6ms | 3rd |
| Unattributable | 349ms | 11ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-741508231 | 339ms | 301ms | 33ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-JGWK0XY7J6&cx=c>m=4e64h1 | 330ms | 272ms | 53ms | 3rd |
| https://cdn-cms-s-8-4.f-static.net/versions/2/system_mini/js/minimizeSITE123website.js?v=y84124423530 | 223ms | 160ms | 29ms | 3rd |
| https://www.redditstatic.com/ads/pixel.js | 147ms | 133ms | 7ms | 3rd |
CJS BundlesAction12 scripts, 180 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-JGWK0XY7J6&cx=c>m=4e64h1 | 172 KB | 67 KB (39%) | ✓ | 3rd |
| https://cdn-cms-s-8-4.f-static.net/versions/2/system_mini/js/minimizeSITE123website.js?v=y84124423530 | 98 KB | 61 KB (63%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-741508231 | 142 KB | 51 KB (36%) | ✓ | 3rd |
| https://cdn-cms-s-8-4.f-static.net/include/insideChat.js?v=y84124423530 | 6 KB | — | ✓ | 3rd |
| https://cdn-cms-s-8-4.f-static.net/versions/2/system_mini/js/minimizeSITE123_tracker.js?v=y84124423530 | 3 KB | — | ✓ | 3rd |
| https://www.redditstatic.com/ads/pixel.js | 19 KB | — | ✓ | 3rd |
| https://pixel.byspotify.com/ping.min.js | 10 KB | — | ✓ | 3rd |
| https://bat.bing.com/bat.js | 15 KB | — | ✓ | 3rd |
| https://googleads.g.doubleclick.net/pagead/viewthroughconversion/741508231/?random=1776808194747&cv=11&fst=1776808194747&bg=ffffff&guid=ON&async=1&en=gtag.config>m=45be64h1v872150702za200zd872150702xec&gcd=13t3t3t2t5l1&dma_cps=a&dma=1&tag_exp=0~115938465~115938469~117266400~118463262&u_w=412&u_h=823&url=https%3A%2F%2Ffr.site123.com%2F&rcb=10&frm=0&tiba=Cr%C3%A9er%20Un%20Site%20Internet%20%7C%20Cr%C3%A9ation%20De%20Site%20Web%20Gratuit%20-%20SITE123&hn=www.googleadservices.com&npa=0&pscdl=noapi&auid=543878192.1776808195&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uamb=1&uam=moto%20g%20power%20(2022)&uap=Android&uapv=11.0&uaw=0&data=event%3Dgtag.config&rfmt=3&fmt=4 | 2 KB | — | ✓ | 3rd |
| https://googleads.g.doubleclick.net/pagead/viewthroughconversion/741508231/?random=1776808194778&cv=11&fst=1776808194778&bg=ffffff&guid=ON&async=1&en=visitorInfo>m=45be64h1v872150702za200zd872150702xec&gcd=13t3t3t2t5l1&dma_cps=a&dma=1&tag_exp=0~115938465~115938469~117266400~118463262&u_w=412&u_h=823&url=https%3A%2F%2Ffr.site123.com%2F&rcb=10&frm=0&tiba=Cr%C3%A9er%20Un%20Site%20Internet%20%7C%20Cr%C3%A9ation%20De%20Site%20Web%20Gratuit%20-%20SITE123&hn=www.googleadservices.com&npa=0&pscdl=noapi&auid=543878192.1776808195&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uamb=1&uam=moto%20g%20power%20(2022)&uap=Android&uapv=11.0&uaw=0&data=event%3DvisitorInfo%3BpageType%3DhomepagePage%3BvisitorLanguage%3Dfr&rfmt=3&fmt=4 | 2 KB | — | ✓ | 3rd |
Consider code splitting or tree shaking to reduce unused code.
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.
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.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
BPage Weight Inventory65 resources · 1.2 MB · 180 KB savings availableREVIEW
~179.7 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 65 resources | 1.2 MiB | ||||||
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading2 fonts (490 KB)PASS
Web fonts
2
490 KB total
Render-blocking
0
of 2
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
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 ~228 KB and ~456 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall65 requests over 1561msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
fr.site123.com fr.site123.com | Other | 521ms | 16 KB | — | $3/mo | Costly |
Unattributable Unattributable | Other | 349ms | 0 KB | — | $2/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 339ms | 142 KB | 36% | $2/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 330ms | 172 KB | 39% | $2/mo | Costly |
cdn-cms-s-8-4.f-static.net cdn-cms-s-8-4.f-static.net | Other | 223ms | 98 KB | 63% | $1/mo | Costly |
www.redditstatic.com www.redditstatic.com | Other | 147ms | 19 KB | — | $1/mo | Optional |
These scripts may cost more than they're worth
- fr.site123.com adds 521ms and costs ~$3/month
- Unattributable adds 349ms and costs ~$2/month
- Google Tag Manager adds 339ms and costs ~$2/month
- Google Tag Manager adds 330ms and costs ~$2/month
- cdn-cms-s-8-4.f-static.net adds 223ms and costs ~$1/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
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
fr.site123.com takes 521ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Unattributable takes 349ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Google Tag Manager takes 339ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Google Tag Manager takes 330ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
cdn-cms-s-8-4.f-static.net takes 223ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
63% of cdn-cms-s-8-4.f-static.net's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev