https://dnsdumpster.com
Performance
· 23 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
92
GRADE
A
FIX
0
REVIEW
5
PASS
14
INFO
4
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
96
95
81
100
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
757 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.31 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
0 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.
1.06 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.
1.31 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
2314 PASS 5 REVIEW
BPage Weight Budget1.1 MB transferred, 43 requestsREVIEW
Page Weight Budget
1.1 MB transferred, 43 requests
1.1 MB transferred, 43 requests
Info::
Page weighs 2.4 MB (1.1 MB transferred)
Warning::
JavaScript is 514 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 514 KB
Info::
43 HTTP requests
Info::
Estimated 0.23 g CO2 per page load
1.1 MB transferred
43 requests
0.23 g CO2 per page load
JavaScript 514.1 KiB 46%
Images 494.8 KiB 44%
CSS 50.5 KiB 4%
Fonts 38.2 KiB 3%
HTML 22.4 KiB 2%
Other 3.8 KiB 0%
Other 837 B 0%
Other 549 B 0%
0 2.4 MB 4.9 MB
Under budget
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Why this matters
JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.
Source: web.dev
BImage Optimization6 images, 0 KB saveableREVIEW
Image Optimization
6 images, 0 KB saveable
6 images, 0 KB saveable
Info::
All images are well-optimized
6 images 495 KB
0 oversized -0 KB
5 legacy format
0 missing dimensions CLS risk
CJS BundlesAction19 scripts, 202 KB unusedREVIEW
JS Bundles
Action19 scripts, 202 KB unused
19 scripts, 202 KB unused
Warning::
https://dnsdumpster.com/wp-content/cache/autoptimi...: 130 KB unused (92%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-FPGN...: 72 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 202 KB
202 KB unused JavaScript
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://dnsdumpster.com/wp-content/cache/autoptimize/js/autoptimize_single_a5b16245bc6b702206dc214c71db8a9d.js | 142 KB | 130 KB (92%) | ✓ | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-FPGN9YXFNE | 175 KB | 72 KB (41%) | ✓ | 3rd |
| https://dnsdumpster.com/wp-content/plugins/woocommerce/assets/js/jquery-blockui/jquery.blockUI.min.js?ver=2.7.0-wc.10.8.1 | 4 KB | — | ✓ | 1st |
| https://dnsdumpster.com/wp-content/cache/autoptimize/js/autoptimize_single_67f5f9c5762f23f5b035045a09d19a8f.js | 39 KB | — | ✓ | 1st |
| https://dnsdumpster.com/wp-content/plugins/woocommerce/assets/client/blocks/woocommerce/customer-account.js?ver=4d4c517c6dc2b50c4b86 | 1 KB | — | ✓ | 1st |
| https://dnsdumpster.com/wp-content/plugins/woocommerce/assets/js/frontend/add-to-cart.min.js?ver=10.8.1 | 2 KB | — | ✓ | 1st |
| https://dnsdumpster.com/wp-content/plugins/woocommerce/assets/js/js-cookie/js.cookie.min.js?ver=2.1.4-wc.10.8.1 | 1 KB | — | ✓ | 1st |
| https://dnsdumpster.com/wp-content/plugins/woocommerce/assets/js/frontend/woocommerce.min.js?ver=10.8.1 | 2 KB | — | ✓ | 1st |
| https://dnsdumpster.com/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 | 32 KB | — | ✓ | 1st |
| https://dnsdumpster.com/wp-includes/js/dist/script-modules/block-library/navigation/view.min.js?ver=b0f909c3ec791c383210 | 2 KB | — | ✓ | 1st |
Consider code splitting or tree shaking to reduce unused code.
Why this matters
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.
Why this matters
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
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.
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
ActionWhether the site is served from green-energy infrastructure
Green Hosting
No green hosting detected
A+Third-Party Impact16% third-party, 0 ms blockingPASS
Third-Party Impact
16% third-party, 0 ms blocking
16% third-party, 0 ms blocking
Info::
Third-party code accounts for 16% of page weight (175.6 KiB of 1.1 MiB)
Info::
Third-party blocking time is low (0 ms)
84%
16%
First-party Third-party
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 Cost382ms total JS executionPASS
JS Execution Cost
382ms total JS execution
382ms total JS execution
Info::
https://dnsdumpster.com/: 189ms CPU time
Info::
Unattributable: 73ms CPU time
Info::
https://dnsdumpster.com/cdn-cgi/challenge-platform...: 62ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-FPGN...: 59ms CPU time
Info::
Third-party scripts: 59ms (15% of total)
Main Thread Breakdown
Script Evaluation 39% Other 29% Style & Layout 13% Rendering 9% Script Parsing & Compilation 6% Parse HTML & CSS 4%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://dnsdumpster.com/ | 189ms | 9ms | 1ms | 1st |
| Unattributable | 73ms | 11ms | 0ms | 1st |
| https://dnsdumpster.com/cdn-cgi/challenge-platform/scripts/jsd/main.js | 62ms | 58ms | 1ms | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-FPGN9YXFNE | 59ms | 48ms | 10ms | 3rd |
A+Font Loading1 fonts (38 KB)PASS
Font Loading
1 fonts (38 KB)
1 fonts (38 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
1
38 KB total
Render-blocking
0
of 1
Dominant font-display
swap
Most common across fonts
Font loading timeline
Transfer FOIT (block) FOUT (swap)
QldgNThLqRwH-OJ1UHjlKEN... woff2 swap
Size 38 KB
Load time 125 ms
Start 502 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+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+Compression AlgorithmMain response uses brotliPASS
Compression Algorithm
Main response uses brotli
Main response uses brotli
Info::
Main HTML response uses brotli (Content-Encoding: br)
Brotli is the best text-compression algorithm for general use, ~20% smaller than gzip on average (40% on smaller files). Modern browsers all support it.
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+Main HTML Cache-ControlMain HTML max-age=300 (≤ 5min) is appropriatePASS
Main HTML Cache-Control
Main HTML max-age=300 (≤ 5min) is appropriate
Main HTML max-age=300 (≤ 5min) is appropriate
Info::
Main HTML max-age=300 (≤ 5min) is appropriate
Got: max-age=300
A+Server Response Intelligence2 server-response signal(s) detectedPASS
Server Response Intelligence
2 server-response signal(s) detected
2 server-response signal(s) detected
Info::
`Vary` header declared: accept-encoding
The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).
Info::
`Last-Modified` present -- timestamp-based conditional GET supported
Consider also setting `ETag` for stronger revalidation -- ETags are content hashes that don't suffer from clock-skew or DST issues. Last-Modified alone is functional for conditional GETs and not a bug.
APage Weight Inventory43 resources · 1.1 MB · 202 KB savings availablePASS
Page Weight Inventory
43 resources · 1.1 MB · 202 KB savings available
43 resources · 1.1 MB · 202 KB savings available
Warning::
Page weight 1.1 MB exceeds 1 MB target by 101 KB
Got: 1.1 MB Expected: ≤ 1 MB
Info::
~202 KB of savings available
Info::
2 third-party resources (16% of weight)
Info::
1 resources over 200KB
43 resources · 1.1 MiB · 2 third-party 101.2 KiB over 1MB target
JavaScript 46% · 514.1 KiB
Image 44% · 498.4 KiB
CSS 4% · 50.5 KiB
Font 3% · 38.2 KiB
Document 2% · 22.4 KiB
Other 0% · 1.6 KiB
~202.5 KiB of savings available
Remove unused JavaScript: 202.5 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 43 resources | 1.1 MiB | ||||||
A+HTTP Cachingmax-age=300 (5 minutes)PASS
HTTP Caching
max-age=300 (5 minutes)
max-age=300 (5 minutes)
Info::
Cache-Control header is set
Got: max-age=300
Info::
Effective TTL: 5 minutes (max-age=300)
Info::
Last-Modified header present
Cache-Control
max-age=300
| Directive | Value | Meaning |
|---|---|---|
| max-age | 300 | Cache for 5 minutes |
Effective TTL: 300 seconds
Network Waterfall43 requests over 971msINFO
Network Waterfall
43 requests over 971ms
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
15% of JavaScript execution is third-party
First-party Third-party 59ms · 175KB · $1/mo
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Google Tag Manager www.googletagmanager.com | Tag Manager | 59ms | 175 KB | 41% | $1/mo | Optional |
Google Tag Manager
Tag Manager
Execution 59ms
Transfer 175 KB
Unused 41%
Monthly Cost $1/mo
Real-User Performance (CrUX)Field metrics from the Chrome User Experience ReportINFO
Real-User Performance (CrUX)
Field metrics from the Chrome User Experience Report
Chrome User Experience (CrUX)
Real-user metrics from the Chrome UX Report (2026-05-22 — 2026-06-18)
LCP (p75)
1619 ms
87% good
INP (p75)
101 ms
86% good
CLS (p75)
0.220
48% good
FCP (p75)
1518 ms
TTFB (p75)
596 ms
Image Optimization1 images, 3 KB total, 0 KB wastedINFO
Image Optimization
1 images, 3 KB total, 0 KB wasted
Image Optimization Audit
Total Images
1
Total Size
3 KB
1 missing dimensions
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.