Performance
· 27 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.
2.75 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.80 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
919 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.
4.06 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.
9.00 s
Page Load Progression
DThird-Party ImpactAction69% third-party, 0 ms blockingFIX
DJS Execution CostAction2419ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-VNCZT0PMG9 | 424ms | 324ms | 97ms | 3rd |
| https://pagead2.googlesyndication.com/pagead/managed/js/adsense/m202607080101/show_ads_impl_fy2021.js?bust=31099654 | 424ms | 323ms | 87ms | 3rd |
| https://www.mybts.fr/ | 404ms | 66ms | 28ms | 1st |
| Unattributable | 391ms | 12ms | 0ms | 1st |
| https://fundingchoicesmessages.google.com/i/ca-pub-2232486685154121?href=https%3A%2F%2Fwww.mybts.fr&ers=2 | 345ms | 292ms | 48ms | 3rd |
| https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-2232486685154121 | 188ms | 153ms | 25ms | 3rd |
| https://www.mybts.fr/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 | 125ms | 92ms | 15ms | 1st |
| https://ep2.adtrafficquality.google/sodar/sodar2.js | 66ms | 58ms | 3ms | 3rd |
| https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?fcd=true | 51ms | 24ms | 24ms | 3rd |
DJS BundlesAction16 scripts, 317 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://pagead2.googlesyndication.com/pagead/managed/js/adsense/m202607080101/show_ads_impl_fy2021.js?bust=31099654 | 166 KB | 121 KB (73%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-VNCZT0PMG9 | 160 KB | 67 KB (42%) | ✓ | 3rd |
| https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?fcd=true | 55 KB | 44 KB (80%) | ✓ | 3rd |
| https://fundingchoicesmessages.google.com/i/ca-pub-2232486685154121?href=https%3A%2F%2Fwww.mybts.fr&ers=2 | 70 KB | 36 KB (52%) | ✓ | 3rd |
| https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-2232486685154121 | 55 KB | 29 KB (52%) | ✓ | 3rd |
| https://www.mybts.fr/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 | 30 KB | 20 KB (68%) | ✓ | 1st |
| blob:https://www.mybts.fr/2d26be6b-5dbd-465a-8a91-d0fa83dc2bc3 | -0 KB | — | ✓ | 3rd |
| https://www.mybts.fr/wp-content/plugins/responsive-menu/v4.0.0/assets/js/rmp-menu.min.js?ver=4.7.2 | 2 KB | — | ✓ | 1st |
| https://www.mybts.fr/wp-includes/js/wp-emoji-release.min.js?ver=80620a876b754d989f2ac04b2ebcae86 | 6 KB | — | ✓ | 1st |
| https://fundingchoicesmessages.google.com/f/AGSKWxWYA1hk_vBEErlOnKS6ubR-4x4XL8lUQmY8gncbS6_kpr24yJqbi_8HBvQ_1TqNVWMMffLizOGRhHREVazwBt_MclzOTLSvkUiuCUSOdOrakZZDhR7fHnJmp_ubK929e_52TfjqeQ==?fccs=W251bGwsbnVsbCxudWxsLG51bGwsbnVsbCxudWxsLFsxNzgzNzA5NTAwLDIxMDAwMDAwMF0sbnVsbCxudWxsLG51bGwsW251bGwsWzddXSwiaHR0cHM6Ly93d3cubXlidHMuZnIvIixudWxsLFtbOCwiU1ppSUR4TThrMTQiXSxbOSwiZW4tVVMiXSxbMTgsIltbW251bGwsMjM2OF1dXSJdLFszNSwiMTc4MzcwOTUwMCJdLFsxOSwiMiJdLFsxNywiWzBdIl0sWzI0LCIiXSxbMjksImZhbHNlIl1dXQ | 1 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
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
BImage Optimization15 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
BHTTP/3 (QUIC)HTTP/3 not advertisedREVIEW
BCompression AlgorithmMain response uses gzip; brotli would be ~20% smallerREVIEW
CMain HTML Cache-ControlActionMain HTML max-age=864000 (~14400min) is aggressiveREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
BPage Weight Inventory60 resources · 829 KB · 317 KB savings availableREVIEW
~316.9 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 60 resources | 828.8 KiB | ||||||
APage Weight Budget829 KB transferred, 60 requestsPASS
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.
Source: web.dev
A+Text CompressionAll text resources are compressedPASS
A+Font LoadingNo web fonts (system fonts)PASS
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Server Response Intelligence2 server-response signal(s) detectedPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
AJavaScript Blocking1 JS blocking issue(s) detectedPASS
ACSS Performance Depth1 CSS depth issue(s) detectedPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Infomaniak
AHTTP Cachingmax-age=864000 (1 week)PASS
max-age=864000
| Directive | Value | Meaning |
|---|---|---|
| max-age | 864000 | Cache for 1 week |
Network Waterfall60 requests over 3458msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Google Tag Manager www.googletagmanager.com | Tag Manager | 424ms | 160 KB | 42% | €2/mo | Costly |
pagead2.googlesyndication.com pagead2.googlesyndication.com | Other | 424ms | 166 KB | 73% | €2/mo | Costly |
fundingchoicesmessages.google.com fundingchoicesmessages.google.com | Other | 345ms | 70 KB | 52% | €1/mo | Costly |
pagead2.googlesyndication.com pagead2.googlesyndication.com | Other | 188ms | 55 KB | 52% | €1/mo | Optional |
ep2.adtrafficquality.google ep2.adtrafficquality.google | Other | 66ms | 8 KB | — | €0/mo | Optional |
pagead2.googlesyndication.com pagead2.googlesyndication.com | Other | 51ms | 55 KB | 80% | €0/mo | Optional |
These scripts may cost more than they're worth
- Google Tag Manager adds 424ms and costs ~€2/month
- pagead2.googlesyndication.com adds 424ms and costs ~€2/month
- fundingchoicesmessages.google.com adds 345ms and costs ~€1/month
62% of JavaScript execution time comes from third-party scripts.
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
Google Tag Manager takes 424ms 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
pagead2.googlesyndication.com takes 424ms 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
73% of pagead2.googlesyndication.com'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
fundingchoicesmessages.google.com takes 345ms 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
52% of fundingchoicesmessages.google.com'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
52% of pagead2.googlesyndication.com'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
80% of pagead2.googlesyndication.com'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
Real-User Performance (CrUX)Field metrics from the Chrome User Experience ReportINFO
Chrome User Experience (CrUX)
Real-user metrics from the Chrome UX Report (2026-06-11 — 2026-07-08)
LCP (p75)
2119 ms
86% good
INP (p75)
0 ms
0% good
CLS (p75)
0.000
100% good
FCP (p75)
2103 ms
TTFB (p75)
1810 ms
Image Optimization21 images, 99 KB total, 0 KB wastedINFO
Image Optimization Audit
Total Images
21
Total Size
99 KB