https://wbsengineers.com.au
Performance
· 23 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
83
GRADE
B
FIX
1
REVIEW
7
PASS
12
INFO
3
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
82
86
92
92
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.
2.21 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
76 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.068
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.34 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.
2.28 s
Page Load Progression
557 ms 1.1 s
1.7 s
2.2 s
2.8 s
3.3 s
3.9 s
4.5 sChecks
2312 PASS 7 REVIEW 1 FIX
FPage Weight BudgetAction26.1 MB transferred, 87 requestsFIX
Page Weight Budget
Action26.1 MB transferred, 87 requests
26.1 MB transferred, 87 requests
Critical::
Page weighs 23.7 MB (26.1 MB transferred)
Warning::
Images are 1.8 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.8 MB
Info::
87 HTTP requests
Info::
Estimated 5.5 g CO2 per page load
26.1 MB transferred
87 requests
5.5 g CO2 per page load
Other 23.6 MiB 91%
Images 1.8 MiB 7%
JavaScript 383.9 KiB 1%
CSS 144.7 KiB 1%
Fonts 114.4 KiB 0%
HTML 40.7 KiB 0%
Other 883 B 0%
Other 550 B 0%
Other 359 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
BImage Optimization18 images, 0 KB saveableREVIEW
Image Optimization
18 images, 0 KB saveable
18 images, 0 KB saveable
Info::
All images are well-optimized
18 images 1.8 MB
0 oversized -0 KB
18 legacy format
0 missing dimensions CLS risk
CJS Execution CostAction1362ms total JS executionREVIEW
JS Execution Cost
Action1362ms total JS execution
1362ms total JS execution
Warning::
https://wbsengineers.com.au/: 551ms CPU time
Warning::
Unattributable: 412ms CPU time
Info::
https://wbsengineers.com.au/wp-includes/js/jquery/...: 216ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-Y03H...: 183ms CPU time
Info::
Third-party scripts: 183ms (13% of total)
Main Thread Breakdown
Other 38% Script Evaluation 27% Style & Layout 22% Parse HTML & CSS 6% Script Parsing & Compilation 4% Rendering 3%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://wbsengineers.com.au/ | 551ms | 21ms | 4ms | 1st |
| Unattributable | 412ms | 5ms | 0ms | 1st |
| https://wbsengineers.com.au/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 | 216ms | 136ms | 3ms | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-Y03HH0HNVD | 183ms | 158ms | 24ms | 3rd |
BJS Bundles23 scripts, 123 KB unusedREVIEW
JS Bundles
23 scripts, 123 KB unused
23 scripts, 123 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-Y03H...: 73 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1....: 50 KB unused (89%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 123 KB
123 KB unused JavaScript
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-Y03HH0HNVD | 177 KB | 73 KB (41%) | ✓ | 3rd |
| https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.12.1/jquery-ui.min.js?ver=1 | 56 KB | 50 KB (89%) | ✓ | 3rd |
| https://wbsengineers.com.au/wp-content/plugins/elementor/assets/js/frontend.min.js?ver=4.3.2 | 19 KB | — | ✓ | 1st |
| https://wbsengineers.com.au/wp-content/plugins/interactive-image-map-builder/assets/js/main-output-file.js?ver=1 | 5 KB | — | ✓ | 1st |
| https://wbsengineers.com.au/wp-content/themes/astra/assets/js/minified/frontend.min.js?ver=4.14.0 | 6 KB | — | ✓ | 1st |
| https://wbsengineers.com.au/wp-includes/js/dist/dom-ready.min.js?ver=3fe927cab37bf38d6a23 | 1 KB | — | ✓ | 1st |
| https://wbsengineers.com.au/wp-content/plugins/astra-sites/inc/lib/onboarding/assets/dist/template-preview/main.js?ver=089983451e6a251a0ab9 | 3 KB | — | ✓ | 1st |
| https://wbsengineers.com.au/wp-content/plugins/elementor/assets/js/webpack.runtime.min.js?ver=4.3.2 | 0 KB | — | ✓ | 1st |
| https://wbsengineers.com.au/wp-content/plugins/elementor/assets/js/frontend-modules.min.js?ver=4.3.2 | 16 KB | — | ✓ | 1st |
| https://wbsengineers.com.au/wp-includes/js/jquery/ui/core.min.js?ver=1.14.2 | 7 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
BHTTP/3 (QUIC)HTTP/3 not advertisedREVIEW
HTTP/3 (QUIC)
HTTP/3 not advertised
HTTP/3 not advertised
Info::
HTTP/3 (QUIC) is not advertised
HTTP/3 isn't advertised via Alt-Svc and the worker didn't negotiate h3. HTTP/3 reduces handshake latency (1-RTT instead of 2-3 RTTs) and is more resilient on lossy connections. Most modern CDNs (Cloudflare, Fastly, AWS CloudFront, Google Cloud CDN) support HTTP/3 with a single config switch -- consider enabling for mobile-heavy workloads.
CMain HTML Cache-ControlActionMain HTML max-age=172800 (~2880min) is aggressiveREVIEW
Main HTML Cache-Control
ActionMain HTML max-age=172800 (~2880min) is aggressive
Main HTML max-age=172800 (~2880min) is aggressive
Warning::
Main HTML cached for 2880 minutes -- risks stale auth / SPA state
Long max-age on the main HTML document means users may see outdated auth state, SPA shells, or A/B variants until the cache expires. Consider Cache-Control: no-cache (or max-age=300) for HTML and let your hashed assets (JS/CSS/images) carry the long cache instead.
Got: max-age=172800
CPage Weight InventoryAction87 resources · 26.1 MB · 123 KB savings availableREVIEW
Page Weight Inventory
Action87 resources · 26.1 MB · 123 KB savings available
87 resources · 26.1 MB · 123 KB savings available
Warning::
Page weight 26.1 MB exceeds 1 MB target by 25.1 MB
Got: 26.1 MB Expected: ≤ 1 MB
Info::
~123 KB of savings available
Info::
10 third-party resources (1% of weight)
Info::
5 resources over 200KB
87 resources · 26.1 MiB · 10 third-party 25.1 MiB over 1MB target
Media 91% · 23.6 MiB
Image 7% · 1.8 MiB
JavaScript 1% · 383.9 KiB
CSS 1% · 144.7 KiB
Font 0% · 114.4 KiB
Document 0% · 40.7 KiB
Other 0% · 909 B
~122.9 KiB of savings available
Remove unused JavaScript: 122.9 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 87 resources | 26.1 MiB | ||||||
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 Impact1% third-party, 0 ms blockingPASS
Third-Party Impact
1% third-party, 0 ms blocking
1% third-party, 0 ms blocking
Info::
Third-party code accounts for 1% of page weight (344.3 KiB of 26.1 MiB)
Info::
Third-party blocking time is low (0 ms)
99%
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+Font Loading6 fonts (114 KB)PASS
Font Loading
6 fonts (114 KB)
6 fonts (114 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
6
114 KB total
Render-blocking
0
of 6
Dominant font-display
swap
Most common across fonts
Font loading timeline
Transfer FOIT (block) FOUT (swap)
poppins-pxibyp8kv8jhgfv... woff2 swap
Size 8 KB
Load time 36 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
poppins-pxieyp8kv8jhgfv... woff2 swap
Size 8 KB
Load time 39 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
poppins-pxibyp8kv8jhgfv... woff2 swap
Size 8 KB
Load time 35 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
poppins-pxibyp8kv8jhgfv... woff2 swap
Size 8 KB
Load time 16 ms
Start 1.3 s
Risk FOUT — text flashes from fallback to web font
poppins-pxibyp8kv8jhgfv... woff2 swap
Size 8 KB
Load time 26 ms
Start 1.5 s
Risk FOUT — text flashes from fallback to web font
fa-solid-900.woff2 woff2 swap
Size 74 KB
Load time 46 ms
Start 1.5 s
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+Document CompressionDocument response uses brotliPASS
Document Compression
Document response uses brotli
Document 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+Asset CompressionAll 1 asset host use brotliPASS
Asset Compression
All 1 asset host use brotli
All 1 asset host use brotli
Info::
cdnjs.cloudflare.com serves assets with brotli (assets: 5)
Got: cdnjs.cloudflare.com (text/css)
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-Timing Observability3 Server-Timing entries advertisedPASS
Server-Timing Observability
3 Server-Timing entries advertised
3 Server-Timing entries advertised
Info::
Server-Timing header advertises 3 timing entries
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::
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.
AHTTP Cachingmax-age=172800 (2 days)PASS
HTTP Caching
max-age=172800 (2 days)
max-age=172800 (2 days)
Info::
Cache-Control header is set
Got: max-age=172800
Info::
Effective TTL: 2 days (max-age=172800)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control
max-age=172800
| Directive | Value | Meaning |
|---|---|---|
| max-age | 172800 | Cache for 2 days |
Effective TTL: 172800 seconds
Network Waterfall87 requests over 2131msINFO
Network Waterfall
87 requests over 2131ms
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
13% of JavaScript execution is third-party
First-party Third-party 183ms · 177KB · A$1/mo
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Google Tag Manager www.googletagmanager.com | Tag Manager | 183ms | 177 KB | 41% | A$1/mo | Optional |
Google Tag Manager
Tag Manager
Execution 183ms
Transfer 177 KB
Unused 41%
Monthly Cost A$1/mo
Image Optimization32 images, 419 KB total, 195 KB wastedINFO
Image Optimization
32 images, 419 KB total, 195 KB wasted
Image Optimization Audit
Total Images
32
Total Size
419 KB
Oversized
1
Wasted
195 KB
2 missing alt text 7 missing dimensions 24 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.