Performance
· 23 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.
1.40 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.89 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
74 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.
1.74 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.
2.39 s
Page Load Progression
DThird-Party ImpactAction64% third-party, 0 ms blockingFIX
DJS BundlesAction16 scripts, 338 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://pagead2.googlesyndication.com/pagead/managed/js/adsense/m202607010101/show_ads_impl_fy2021.js | 165 KB | 120 KB (73%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-VNCZT0PMG9 | 160 KB | 67 KB (42%) | ✓ | 3rd |
| https://pagead2.googlesyndication.com/pagead/js/lidar.js?fcd=true | 83 KB | 66 KB (79%) | ✓ | 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 (53%) | ✓ | 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/65d35439-7ed1-437c-92eb-362f5cba6b7a | -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/AGSKWxXHEQdst9q1z05CTbjxm79ko9kZ57at7m1oEqkWTzKfRySjr_ccb76ZAG0nEcSOKBb8RztWp4h6tS2n4-FK0VrCttf6iodRS44zBLt7JAFZn8FDRw8aEw8_c-vDvsRoS9dDkVEsaA==?fccs=W251bGwsbnVsbCxudWxsLG51bGwsbnVsbCxudWxsLFsxNzgzNzA5NTE4LDM0NDAwMDAwMF0sbnVsbCxudWxsLG51bGwsW251bGwsWzddXSwiaHR0cHM6Ly93d3cubXlidHMuZnIvIixudWxsLFtbOCwiU1ppSUR4TThrMTQiXSxbOSwiZW4tVVMiXSxbMTgsIltbW251bGwsMjA2M11dXSJdLFszNSwiMTc4MzcwOTUxOCJdLFsyNiwiOCJdLFszMywiOCJdLFsxOSwiMiJdLFsxNywiWzBdIl0sWzI0LCIiXSxbMjUsIltbOTUzNzI1NDRdXSJdLFsyOSwiZmFsc2UiXV1d | 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 Optimization25 images, 0 KB saveableREVIEW
BJS Execution Cost538ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-VNCZT0PMG9 | 124ms | 94ms | 29ms | 3rd |
| https://pagead2.googlesyndication.com/pagead/managed/js/adsense/m202607010101/show_ads_impl_fy2021.js | 122ms | 89ms | 30ms | 3rd |
| https://www.mybts.fr/ | 116ms | 12ms | 8ms | 1st |
| Unattributable | 100ms | 3ms | 0ms | 1st |
| https://fundingchoicesmessages.google.com/i/ca-pub-2232486685154121?href=https%3A%2F%2Fwww.mybts.fr&ers=2 | 75ms | 65ms | 8ms | 3rd |
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 Inventory70 resources · 937 KB · 338 KB savings availableREVIEW
~338.3 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 70 resources | 937.3 KiB | ||||||
APage Weight Budget937 KB transferred, 70 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+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 Waterfall70 requests over 3145msINFO
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 | 124ms | 160 KB | 42% | €1/mo | Optional |
pagead2.googlesyndication.com pagead2.googlesyndication.com | Other | 122ms | 165 KB | 73% | €1/mo | Optional |
fundingchoicesmessages.google.com fundingchoicesmessages.google.com | Other | 75ms | 70 KB | 52% | €0/mo | Optional |
60% 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
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
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
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