https://backmarket.it
Performance
· 21 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
89
GRADE
B
FIX
4
REVIEW
4
PASS
11
INFO
2
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
81
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.
923 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
3.11 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
62 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.003
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.17 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.
3.71 s
Page Load Progression
375 ms
750 ms
1.1 s 1.5 s
1.9 s 2.2 s
2.6 s
3.0 sChecks
2111 PASS 4 REVIEW 4 FIX
FPage Weight BudgetAction3.7 MB transferred, 151 requestsFIX
Page Weight Budget
Action3.7 MB transferred, 151 requests
3.7 MB transferred, 151 requests
Warning::
Page weighs 9.0 MB (3.7 MB transferred)
Warning::
Images are 2.6 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 2.6 MB
Warning::
151 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.78 g CO2 per page load
3.7 MB transferred
151 requests
0.78 g CO2 per page load
Images 2.6 MiB 69%
JavaScript 483.9 KiB 13%
Other 373.3 KiB 10%
HTML 217.0 KiB 6%
Fonts 83.6 KiB 2%
Other 3.0 KiB 0%
Other 945 B 0%
CSS 0 B 0%
0 2.4 MB 4.9 MB
Over budget
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Why this matters
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
Source: web.dev
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
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 (3.7 MiB of 3.7 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
DPage Weight InventoryAction151 resources · 3.7 MB · 0 KB savings availableFIX
Page Weight Inventory
Action151 resources · 3.7 MB · 0 KB savings available
151 resources · 3.7 MB · 0 KB savings available
Warning::
Page weight 3.7 MB exceeds 1 MB target by 2.7 MB
Got: 3.7 MB Expected: ≤ 1 MB
Warning::
150 third-party resources (100% of weight)
Info::
6 resources over 200KB
151 resources · 3.7 MiB · 150 third-party 2.7 MiB over 1MB target
Image 69% · 2.6 MiB
JavaScript 13% · 483.9 KiB
Other 10% · 376.9 KiB
Document 6% · 217.4 KiB
Font 2% · 83.6 KiB
CSS 0% · 0 B
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 151 resources | 3.7 MiB | ||||||
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.
BImage Optimization55 images, 0 KB saveableREVIEW
Image Optimization
55 images, 0 KB saveable
55 images, 0 KB saveable
Info::
All images are well-optimized
55 images 2.6 MB
0 oversized -0 KB
5 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.
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-Semibold.woff2 woff2 swap
Size 19 KB
Load time 67 ms
Start 498 ms
Risk FOUT — text flashes from fallback to web font
BMDupletTXT-Regular.woff2 woff2 swap
Size 18 KB
Load time 68 ms
Start 498 ms
Risk FOUT — text flashes from fallback to web font
IvarSoft-SemiBold.woff2 woff2 swap
Size 27 KB
Load time 31 ms
Start 650 ms
Risk FOUT — text flashes from fallback to web font
BMDupletDSP-Semibold.woff2 woff2 swap
Size 19 KB
Load time 56 ms
Start 651 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
A+Resource HintsNo optimization neededPASS
Resource Hints
No optimization needed
No optimization needed
Info::
No resource hint issues
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+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 Waterfall151 requests over 3884msINFO
Network Waterfall
151 requests over 3884ms
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.