https://backmarket.it
Performance
· 25 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
89
GRADE
B
FIX
2
REVIEW
6
PASS
15
INFO
2
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
43
91
77
50
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
4.35 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
8.86 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
960 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.
4.35 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.
8.98 s
Page Load Progression
386 ms
772 ms
1.2 s 1.5 s
1.9 s 2.3 s 2.7 s
3.1 sChecks
2515 PASS 6 REVIEW 2 FIX
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
Third-Party Impact
Action100% third-party, 0 ms blocking
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (1.2 MiB of 1.2 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
FHTTP CachingActionNo cache headersFIX
HTTP Caching
ActionNo cache headers
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BPage Weight Budget1.2 MB transferred, 120 requestsREVIEW
Page Weight Budget
1.2 MB transferred, 120 requests
1.2 MB transferred, 120 requests
Info::
Page weighs 6.3 MB (1.2 MB transferred)
Warning::
120 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.26 g CO2 per page load
1.2 MB transferred
120 requests
0.26 g CO2 per page load
Other 382.5 KiB 30%
JavaScript 376.5 KiB 30%
HTML 218.8 KiB 17%
Images 206.2 KiB 16%
Fonts 83.6 KiB 7%
Other 3.0 KiB 0%
CSS 1.2 KiB 0%
Other 846 B 0%
0 2.4 MB 4.9 MB
Under budget
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Why this matters
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
BImage Optimization24 images, 0 KB saveableREVIEW
Image Optimization
24 images, 0 KB saveable
24 images, 0 KB saveable
Info::
All images are well-optimized
24 images 206 KB
0 oversized -0 KB
4 legacy format
0 missing dimensions CLS risk
CCompression AlgorithmActionMain response served uncompressedREVIEW
Compression Algorithm
ActionMain response served uncompressed
Main response served uncompressed
Info::
Main HTML response has no Content-Encoding (uncompressed)
The main HTML document is served without compression. The Text Compression section above lists the broader picture; for the main response specifically, even gzip would shave ~70-80% off most text payloads.
BMain HTML Cache-ControlNo Cache-Control header on main HTML responseREVIEW
Main HTML Cache-Control
No Cache-Control header on main HTML response
No Cache-Control header on main HTML response
Info::
Main HTML response has no Cache-Control header
Without an explicit Cache-Control, browsers fall back to heuristic caching (~10% of Last-Modified age). Set `Cache-Control: no-cache` or `max-age=300` for HTML to control freshness explicitly -- prevents stale auth state and SPA shell drift.
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
Server-Timing Observability
No Server-Timing header found
No Server-Timing header found
Info::
No Server-Timing header found
Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.
CPage Weight InventoryAction120 resources · 1.2 MB · 0 KB savings availableREVIEW
Page Weight Inventory
Action120 resources · 1.2 MB · 0 KB savings available
120 resources · 1.2 MB · 0 KB savings available
Warning::
Page weight 1.2 MB exceeds 1 MB target by 248 KB
Got: 1.2 MB Expected: ≤ 1 MB
Warning::
119 third-party resources (100% of weight)
Info::
1 resources over 200KB
120 resources · 1.2 MiB · 119 third-party 248.4 KiB over 1MB target
Other 30% · 386.0 KiB
JavaScript 30% · 376.5 KiB
Document 17% · 219.0 KiB
Image 16% · 206.2 KiB
Font 7% · 83.6 KiB
CSS 0% · 1.2 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 120 resources | 1.2 MiB | ||||||
A+Text CompressionAll text resources are compressedPASS
Text Compression
All text resources are compressed
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+JS Execution CostNo JS execution dataPASS
JS Execution Cost
No JS execution data
No JS execution data
Info::
No significant JS execution detected
A+Font Loading4 fonts (84 KB)PASS
Font Loading
4 fonts (84 KB)
4 fonts (84 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
4
84 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
Transfer FOIT (block) FOUT (swap)
BMDupletTXT-Regular.woff2 woff2 swap
Size 18 KB
Load time 33 ms
Start 963 ms
Risk FOUT — text flashes from fallback to web font
IvarSoft-SemiBold.woff2 woff2 swap
Size 27 KB
Load time 34 ms
Start 964 ms
Risk FOUT — text flashes from fallback to web font
BMDupletDSP-Semibold.woff2 woff2 swap
Size 19 KB
Load time 34 ms
Start 964 ms
Risk FOUT — text flashes from fallback to web font
BMDupletTXT-Semibold.woff2 woff2 swap
Size 19 KB
Load time 35 ms
Start 964 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+JS Bundles67 scripts, 0 KB unusedPASS
JS Bundles
67 scripts, 0 KB unused
67 scripts, 0 KB unused
0 KB unused JavaScript
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://front-office.statics.backmarket.com/02537f645123726dfd539a86572c3feaf9ec8f4f/_nuxt/fhBxQC66.js | 0 KB | — | ✓ | 3rd |
| https://front-office.statics.backmarket.com/02537f645123726dfd539a86572c3feaf9ec8f4f/_nuxt/0rlOLz4R.js | 0 KB | — | ✓ | 3rd |
| https://front-office.statics.backmarket.com/02537f645123726dfd539a86572c3feaf9ec8f4f/_nuxt/Di9L_CFX.js | 0 KB | — | ✓ | 3rd |
| https://front-office.statics.backmarket.com/02537f645123726dfd539a86572c3feaf9ec8f4f/_nuxt/BjvVWCoE.js | 0 KB | — | ✓ | 3rd |
| https://front-office.statics.backmarket.com/02537f645123726dfd539a86572c3feaf9ec8f4f/_nuxt/CsmHsEfh.js | 0 KB | — | ✓ | 3rd |
| https://front-office.statics.backmarket.com/02537f645123726dfd539a86572c3feaf9ec8f4f/_nuxt/D-Dkg03g.js | 0 KB | — | ✓ | 3rd |
| https://front-office.statics.backmarket.com/02537f645123726dfd539a86572c3feaf9ec8f4f/_nuxt/Cl3VZB1p.js | 0 KB | — | ✓ | 3rd |
| https://front-office.statics.backmarket.com/02537f645123726dfd539a86572c3feaf9ec8f4f/_nuxt/B_xKvvTI.js | 0 KB | — | ✓ | 3rd |
| https://front-office.statics.backmarket.com/02537f645123726dfd539a86572c3feaf9ec8f4f/_nuxt/jbaqucKb.js | 0 KB | — | ✓ | 3rd |
| https://front-office.statics.backmarket.com/02537f645123726dfd539a86572c3feaf9ec8f4f/_nuxt/C5FcTjr-.js | 0 KB | — | ✓ | 3rd |
A+Resource CachingAll resources properly cachedPASS
Resource Caching
All resources properly cached
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+Critical Rendering PathNo render-blocking resourcesPASS
Critical Rendering Path
No render-blocking resources
No render-blocking resources
Info::
No render-blocking resources detected
AResource Hints5 hints, 0 missing preconnectsPASS
Resource Hints
5 hints, 0 missing preconnects
5 hints, 0 missing preconnects
Info::
1 dns-prefetch redundant with preconnect on same origin
preconnect already does the DNS lookup; adding dns-prefetch to the same origin is at best a no-op. Sample: https://sdk.privacy-center.org. Remove the redundant dns-prefetch entries.
Info::
1 URL(s) appear in multiple hints
The same href shouldn't appear in multiple hint rels -- one wins, the others are wasted markup and may confuse cache behavior. Sample: https://sdk.privacy-center.org/ (preconnect+dns-prefetch).
Info::
Page uses 5 resource hint(s)
Current Resource Hints
preconnect 3
preload 1
dns-prefetch 1
prefetch—
5 resource hints configured
preconnect already does the DNS lookup; adding dns-prefetch to the same origin is at best a no-op. Sample: https://sdk.privacy-center.org. Remove the redundant dns-prefetch entries.
Why this matters
Performance issues directly impact user engagement and conversion rates.
The same href shouldn't appear in multiple hint rels -- one wins, the others are wasted markup and may confuse cache behavior. Sample: https://sdk.privacy-center.org/ (preconnect+dns-prefetch).
Why this matters
Performance issues directly impact user engagement and conversion rates.
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
HTTP/3 advertised via Alt-Svc
Info::
HTTP/3 (QUIC) is supported
First-load mobile users on cellular networks see meaningful latency improvements with HTTP/3. The QUIC transport collapses TLS + TCP handshakes into one and recovers faster from packet loss.
A+LCP Image PreloadLCP preload audit not availablePASS
LCP Image Preload
LCP preload audit not available
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+Server Response Intelligence1 server-response signal(s) detectedPASS
Server Response Intelligence
1 server-response signal(s) detected
1 server-response signal(s) detected
Info::
No `ETag` or `Last-Modified` -- conditional GET not supported
Without either header, browsers can't issue conditional GETs and refresh always re-downloads the full response body even when nothing changed. Add `ETag: "<hash>"` (or `Last-Modified: <date>`) on cacheable responses; the server returns 304 Not Modified when the client's cached copy is still valid, saving bandwidth.
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
Render-Blocking Resources
No render-blocking resources detected
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+Third-Party ResourcesNo third-party resources detectedPASS
Third-Party Resources
No third-party resources detected
No third-party resources detected
A+JavaScript BlockingNo render-blocking JS or document.write usage detectedPASS
JavaScript Blocking
No render-blocking JS or document.write usage detected
No render-blocking JS or document.write usage detected
Info::
No JavaScript blocking issues detected
ACSS Performance Depth1 CSS depth issue(s) detectedPASS
CSS Performance Depth
1 CSS depth issue(s) detected
1 CSS depth issue(s) detected
Warning::
13 render-blocking stylesheet(s) -- recommended: <=3
Each `<link rel="stylesheet">` without a non-blocking `media` attribute holds up the first paint. Browsers download all of them before painting any content. Consolidate into 1-2 critical-path stylesheets; defer non-critical CSS via `<link rel="stylesheet" media="print" onload="this.media='all'">` or via the loadCSS pattern; inline above-the-fold CSS in `<style>` to short-circuit the request entirely.
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
Whether the site is served from green-energy infrastructure
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall120 requests over 3910msINFO
Network Waterfall
120 requests over 3910ms
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization151 images, 288 KB total, 23 KB wastedINFO
Image Optimization
151 images, 288 KB total, 23 KB wasted
Image Optimization Audit
Total Images
151
Total Size
288 KB
Oversized
9
Wasted
23 KB
28 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.