Performance
· 15 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.
620 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.97 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
459 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.
2.52 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.
4.23 s
Page Load Progression
FPage Weight BudgetAction4.5 MB transferred, 162 requestsFIX
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
Source: web.dev
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
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DJS Execution CostAction2438ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 481ms | 141ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-KZZNQG5 | 430ms | 385ms | 28ms | 3rd |
| https://www.volvocars.com/static/homepage/_next/static/chunks/18-43fb6d9e6ed6d72e.js | 372ms | 337ms | 7ms | 1st |
| https://www.volvocars.com/ONYqQS/I/V/Vw5MuLN6nQ/ruEwkNf82NDwwL/NA9f/by/FZegdAdEsB | 328ms | 285ms | 18ms | 1st |
| https://www.volvocars.com/br/ | 316ms | 19ms | 28ms | 1st |
| https://cdn.cookielaw.org/scripttemplates/202602.1.0/otBannerSdk.js | 138ms | 56ms | 18ms | 3rd |
| https://www.volvocars.com/static/homepage/_next/static/chunks/1231-da5f48090fafb4af.js | 137ms | 121ms | 16ms | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-73WLWG7342&cx=c>m=4e64h1 | 107ms | 89ms | 17ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-TQ7PVHC>m=4e64h1 | 72ms | 57ms | 14ms | 3rd |
| https://www.volvocars.com/static/homepage/_next/static/chunks/87c73c54-dd8d81ac9604067c.js | 57ms | 13ms | 9ms | 1st |
FJS BundlesAction60 scripts, 692 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.volvocars.com/static/homepage/_next/static/chunks/1231-da5f48090fafb4af.js | 146 KB | 118 KB (81%) | ✓ | 1st |
| https://www.volvocars.com/static/homepage/_next/static/chunks/9832-0d4d5d0edfbb762f.js | 155 KB | 107 KB (72%) | ✓ | 1st |
| https://www.googletagmanager.com/gtm.js?id=GTM-TQ7PVHC>m=4e64h1 | 151 KB | 83 KB (55%) | ✓ | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202602.1.0/otBannerSdk.js | 129 KB | 71 KB (55%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-73WLWG7342&cx=c>m=4e64h1 | 173 KB | 67 KB (39%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-KZZNQG5 | 180 KB | 55 KB (31%) | ✓ | 3rd |
| https://www.volvocars.com/static/homepage/_next/static/chunks/5931-fcf0574bf42285ae.js | 77 KB | 50 KB (65%) | ✓ | 1st |
| https://www.volvocars.com/static/homepage/_next/static/chunks/3849-310faa4a1f2447ee.js | 63 KB | 46 KB (73%) | ✓ | 1st |
| https://www.volvocars.com/static/homepage/_next/static/chunks/7371-f53e6f1a4f2f5978.js | 77 KB | 39 KB (51%) | ✓ | 1st |
| https://www.volvocars.com/ONYqQS/I/V/Vw5MuLN6nQ/ruEwkNf82NDwwL/NA9f/by/FZegdAdEsB | 172 KB | 36 KB (21%) | ✓ | 1st |
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
DPage Weight InventoryAction162 resources · 4.5 MB · 692 KB savings availableFIX
~691.5 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 162 resources | 4.5 MiB | ||||||
DHTTP CachingActionno-store (uncacheable)FIX
max-age=0, no-cache, no-store
| Directive | Value | Meaning |
|---|---|---|
| max-age | 0 | Cache for 0 seconds |
| no-cache | — | Cache but always revalidate first |
| no-store | — | Never cache this response |
BImage Optimization37 images, 0 KB saveableREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Third-Party Impact20% third-party, 0 ms blockingPASS
A+Text CompressionAll text resources are compressedPASS
A+Font Loading1 fonts (86 KB)PASS
Web fonts
1
86 KB total
Render-blocking
0
of 1
Dominant font-display
swap
Most common across fonts
Font loading timeline
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 CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
Network Waterfall162 requests over 5085msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 481ms | 0 KB | — | $6/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 430ms | 180 KB | 31% | $6/mo | Costly |
OneTrust cdn.cookielaw.org | Consent | 138ms | 129 KB | 55% | $2/mo | Essential |
Google Tag Manager www.googletagmanager.com | Tag Manager | 107ms | 173 KB | 39% | $1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 72ms | 151 KB | 55% | $1/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 481ms and costs ~$6/month
- Google Tag Manager adds 430ms and costs ~$6/month
50% 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
Unattributable takes 481ms 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 430ms 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
55% of OneTrust'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
55% of Google Tag Manager'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