https://wbsengineers.com.au
Performance
· 27 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
83
GRADE
B
FIX
2
REVIEW
7
PASS
15
INFO
3
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
48
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.
2.56 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
11.00 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
698 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.009
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
6.37 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.
11.46 s
Page Load Progression
757 ms 1.5 s
2.3 s
3.0 s
3.8 s
4.5 s
5.3 s
6.1 sChecks
2715 PASS 7 REVIEW 2 FIX
FPage Weight BudgetAction18.6 MB transferred, 92 requestsFIX
Page Weight Budget
Action18.6 MB transferred, 92 requests
18.6 MB transferred, 92 requests
Critical::
Page weighs 20.2 MB (18.6 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::
92 HTTP requests
Info::
Estimated 3.9 g CO2 per page load
18.6 MB transferred
92 requests
3.9 g CO2 per page load
Other 16.2 MiB 87%
Images 1.8 MiB 9%
JavaScript 383.7 KiB 2%
CSS 145.2 KiB 1%
Fonts 114.7 KiB 1%
HTML 44.4 KiB 0%
Other 1.1 KiB 0%
Other 782 B 0%
Other 550 B 0%
Other 262 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
FJS Execution CostAction5920ms total JS executionFIX
JS Execution Cost
Action5920ms total JS execution
5920ms total JS execution
Warning::
https://wbsengineers.com.au/: 2487ms CPU time
Warning::
Unattributable: 1549ms CPU time
Warning::
https://wbsengineers.com.au/wp-includes/js/jquery/...: 690ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-Y03H...: 621ms CPU time
Warning::
https://static.cloudflareinsights.com/beacon.min.j...: 281ms CPU time
Info::
Third-party scripts: 983ms (17% of total)
Main Thread Breakdown
Other 39% Script Evaluation 24% Style & Layout 22% Parse HTML & CSS 6% Rendering 5%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://wbsengineers.com.au/ | 2487ms | 61ms | 21ms | 1st |
| Unattributable | 1549ms | 22ms | 0ms | 1st |
| https://wbsengineers.com.au/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 | 690ms | 491ms | 11ms | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-Y03HH0HNVD | 621ms | 530ms | 60ms | 3rd |
| https://static.cloudflareinsights.com/beacon.min.js/vce701823e78c4301a35b7e07294d87301792088814092 | 281ms | 97ms | 12ms | 3rd |
| https://wbsengineers.com.au/wp-content/themes/astra/assets/js/minified/frontend.min.js?ver=4.14.0 | 85ms | 49ms | 3ms | 1st |
| https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.12.1/jquery-ui.min.js?ver=1 | 81ms | 53ms | 27ms | 3rd |
| https://wbsengineers.com.au/wp-content/plugins/interactive-image-map-builder/assets/js/main-output-file.js?ver=1 | 73ms | 61ms | 5ms | 1st |
| https://wbsengineers.com.au/wp-content/plugins/unlimited-elements-for-elementor/assets_libraries/font-awesome6/fontawesome-all.min.css | 53ms | 0ms | 0ms | 1st |
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
BJS Bundles24 scripts, 122 KB unusedREVIEW
JS Bundles
24 scripts, 122 KB unused
24 scripts, 122 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-Y03H...: 72 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: 122 KB
122 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 | 72 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/themes/astra-child/custom.js?ver=7.1.3 | 1 KB | — | ✓ | 1st |
| https://wbsengineers.com.au/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 | 30 KB | — | ✓ | 1st |
| https://wbsengineers.com.au/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js | 1 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 | 1 KB | — | ✓ | 1st |
| https://wbsengineers.com.au/wp-content/plugins/elementor/assets/js/frontend-modules.min.js?ver=4.3.2 | 16 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 InventoryAction92 resources · 18.6 MB · 122 KB savings availableREVIEW
Page Weight Inventory
Action92 resources · 18.6 MB · 122 KB savings available
92 resources · 18.6 MB · 122 KB savings available
Warning::
Page weight 18.6 MB exceeds 1 MB target by 17.6 MB
Got: 18.6 MB Expected: ≤ 1 MB
Info::
~122 KB of savings available
Info::
11 third-party resources (2% of weight)
Info::
4 resources over 200KB
92 resources · 18.6 MiB · 11 third-party 17.6 MiB over 1MB target
Media 87% · 16.2 MiB
Image 9% · 1.8 MiB
JavaScript 2% · 383.7 KiB
CSS 1% · 145.2 KiB
Font 1% · 114.7 KiB
Document 0% · 44.8 KiB
Other 0% · 1.6 KiB
~122.3 KiB of savings available
Remove unused JavaScript: 122.3 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 92 resources | 18.6 MiB | ||||||
BJavaScript Blocking2 JS blocking issue(s) detectedREVIEW
JavaScript Blocking
2 JS blocking issue(s) detected
2 JS blocking issue(s) detected
Warning::
2 render-blocking <script src> tag(s) without async/defer
Each `<script src=...>` without `async`, `defer`, or `type="module"` blocks HTML parsing while the browser fetches and executes it. The block lasts the entire round-trip + execution time -- on slow networks this translates directly into LCP delay. Add `defer` (executes after parse, in source order) for scripts that interact with the DOM, or `async` (executes whenever ready) for analytics / independent scripts. Module scripts (`type="module"`) are deferred by default.
Warning::
Total JS execution time is 5.9 s -- over the 3.5s budget
Total JavaScript execution (parse + compile + run) across all scripts exceeds 3.5 seconds. On low-end devices that becomes 7-15+ seconds and shows up directly in TBT and INP. Reduce by: tree-shaking unused dependencies, code-splitting (dynamic `import()`), removing or deferring third-party tracking, and replacing heavy frameworks where they're not needed.
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 Impact2% third-party, 0 ms blockingPASS
Third-Party Impact
2% third-party, 0 ms blocking
2% third-party, 0 ms blocking
Info::
Third-party code accounts for 2% of page weight (344.4 KiB of 18.6 MiB)
Info::
Third-party blocking time is low (0 ms)
98%
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 (115 KB)PASS
Font Loading
6 fonts (115 KB)
6 fonts (115 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
6
115 KB total
Render-blocking
0
of 6
Dominant font-display
swap
Most common across fonts
Font loading timeline
Transfer FOIT (block) FOUT (swap)
poppins-pxieyp8kv8jhgfv... woff2 swap
Size 8 KB
Load time 181 ms
Start 3.4 s
Risk FOUT — text flashes from fallback to web font
poppins-pxibyp8kv8jhgfv... woff2 swap
Size 8 KB
Load time 182 ms
Start 3.4 s
Risk FOUT — text flashes from fallback to web font
poppins-pxibyp8kv8jhgfv... woff2 swap
Size 8 KB
Load time 183 ms
Start 3.4 s
Risk FOUT — text flashes from fallback to web font
poppins-pxibyp8kv8jhgfv... woff2 swap
Size 8 KB
Load time 196 ms
Start 3.7 s
Risk FOUT — text flashes from fallback to web font
poppins-pxibyp8kv8jhgfv... woff2 swap
Size 8 KB
Load time 173 ms
Start 3.8 s
Risk FOUT — text flashes from fallback to web font
fa-solid-900.woff2 woff2 swap
Size 74 KB
Load time 43 ms
Start 3.9 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 Hints3 hints, 0 missing preconnectsPASS
Resource Hints
3 hints, 0 missing preconnects
3 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://fonts.googleapis.com. Remove the redundant dns-prefetch entries.
Info::
Page uses 3 resource hint(s)
Current Resource Hints
preconnect 2
preload—
dns-prefetch 1
prefetch—
3 resource hints configured
preconnect already does the DNS lookup; adding dns-prefetch to the same origin is at best a no-op. Sample: https://fonts.googleapis.com. Remove the redundant dns-prefetch entries.
Why this matters
Performance issues directly impact user engagement and conversion rates.
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.
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
ACSS Performance Depth1 CSS depth issue(s) detectedPASS
CSS Performance Depth
1 CSS depth issue(s) detected
1 CSS depth issue(s) detected
Warning::
33 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.
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 Waterfall92 requests over 5065msINFO
Network Waterfall
92 requests over 5065ms
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
17% of JavaScript execution is third-party
First-party Third-party 983ms · 233KB · A$6/mo
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Google Tag Manager www.googletagmanager.com | Tag Manager | 621ms | 177 KB | 41% | A$4/mo | Costly |
static.cloudflareinsights.com static.cloudflareinsights.com | Other | 281ms | 0 KB | — | A$2/mo | Costly |
cdnjs cdnjs.cloudflare.com | CDN | 81ms | 56 KB | 89% | A$1/mo | Optional |
Google Tag Manager
Tag Manager
Execution 621ms
Transfer 177 KB
Unused 41%
Monthly Cost A$4/mo
static.cloudflareinsights.com
Other
Execution 281ms
Transfer 0 KB
Monthly Cost A$2/mo
cdnjs
CDN
Execution 81ms
Transfer 56 KB
Unused 89%
Monthly Cost A$1/mo
These scripts may cost more than they're worth
- Google Tag Manager adds 621ms and costs ~A$4/month
- static.cloudflareinsights.com adds 281ms and costs ~A$2/month
Google Tag Manager takes 621ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
Why this matters
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
static.cloudflareinsights.com takes 281ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
Why this matters
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
89% of cdnjs's code is unused. The script may be loading features you don't use.
Why this matters
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
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.