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https://www.abc.net.au

Performance

· 16 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
71
GRADE
C
FIX
4
REVIEW
2
PASS
8
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
28
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
99
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

2.54 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

11.39 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

2.53 s

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.226

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

4.98 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.

18.79 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 s
Checks
16
8 PASS 2 REVIEW 4 FIX
F
Page Weight Budget
Action
5.8 MB transferred, 150 requests
FIX
5.8 MB transferred, 150 requests
Critical::
Page weighs 10.4 MB (5.8 MB transferred)
Warning::
Images are 3.9 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 3.9 MB
Warning::
JavaScript is 1.4 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.4 MB
Warning::
150 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 1.2 g CO2 per page load
5.8 MB / 2.4 MB budget
5.8 MB transferred
150 requests
1.2 g CO2 per page load
Images 3.9 MiB 68%
JavaScript 1.4 MiB 24%
HTML 235.2 KiB 4%
CSS 134.6 KiB 2%
Fonts 78.0 KiB 1%
Other 18.6 KiB 0%
Other 4.7 KiB 0%
Other 2.9 KiB 0%
Other 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

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

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

D
Third-Party Impact
Action
80% third-party, 0 ms blocking
FIX
80% third-party, 0 ms blocking
Warning::
Third-party code accounts for 80% of page weight (4.6 MiB of 5.8 MiB)
Info::
Third-party blocking time is low (0 ms)
20%
80%
First-party Third-party
F
JS Execution Cost
Action
7198ms total JS execution
FIX
7198ms total JS execution
Warning::
https://www.abc.net.au/news-web/_next/static/chunk...: 1800ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-NZ6...: 1407ms CPU time
Warning::
https://www.abc.net.au/: 1085ms CPU time
Warning::
Unattributable: 728ms CPU time
Warning::
https://login.abc.net.au/js/gigya.js?apikey=3_fA1l...: 517ms CPU time
Info::
Third-party scripts: 3316ms (46% of total)

Main Thread Breakdown

Script Evaluation 61% Other 14% Style & Layout 12% Script Parsing & Compilation 7%
ScriptTotalScriptingParse/CompileParty
https://www.abc.net.au/news-web/_next/static/chunks/framework-4a602498427f98ac.js1800ms1509ms19ms1st
https://www.googletagmanager.com/gtm.js?id=GTM-NZ6NQM6F1407ms1249ms75ms3rd
https://www.abc.net.au/1085ms70ms7ms1st
Unattributable728ms9ms0ms3rd
https://login.abc.net.au/js/gigya.js?apikey=3_fA1lYde7bHFw4kAQ_VLT37l-OacxV6xOkYAn0KOPFjrXyrlrovPpV1toELQLABDp517ms442ms65ms3rd
https://www.abc.net.au/news-web/_next/static/chunks/pages/index-7c4e201de3ff7196.js456ms455ms0ms1st
https://www.abc.net.au/news-web/_next/static/chunks/pages/_app-ee0c3be25bf60a06.js371ms157ms36ms1st
https://login.abc.net.au/js/sso.htm?APIKey=3_DHeg1ce5-HbfRNLEbQs6kLcA5kfRcyCq-3o7EJJgM8qCyMJzLQeqGmgeiuQJzD8b&ssoSegment=&version=latest&build=1535&flavor=base&sourceKey=3_fA1lYde7bHFw4kAQ_VLT37l-OacxV6xOkYAn0KOPFjrXyrlrovPpV1toELQLABDp207ms198ms0ms3rd
https://siteintercept.qualtrics.com/dxjsmodule/12.1a2b7192fd54e87d3971.chunk.js?Q_CLIENTVERSION=2.46.0&Q_CLIENTTYPE=web&Q_BRANDID=www.abc.net.au106ms69ms35ms3rd
https://www.abc.net.au/news-web/_next/static/chunks/main-f8430302b7586c39.js102ms89ms12ms1st

Showing top 10 of 16 scripts

F
JS Bundles
Action
61 scripts, 545 KB unused
FIX
61 scripts, 545 KB unused
Warning::
https://login.abc.net.au/js/gigya.js?apikey=3_fA1l...: 137 KB unused (58%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-NZ6...: 72 KB unused (39%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.abc.net.au/news-web/_next/static/chunk...: 63 KB unused (65%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.abc.net.au/news-web/_next/static/chunk...: 62 KB unused (45%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.abc.net.au/news-web/_next/static/chunk...: 36 KB unused (97%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 545 KB
545 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://login.abc.net.au/js/gigya.js?apikey=3_fA1lYde7bHFw4kAQ_VLT37l-OacxV6xOkYAn0KOPFjrXyrlrovPpV1toELQLABDp239 KB137 KB (58%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-NZ6NQM6F185 KB72 KB (39%)✓3rd
https://www.abc.net.au/news-web/_next/static/chunks/464a22fe-d8a7a6e9ffdfc9c4.js98 KB63 KB (65%)✓1st
https://www.abc.net.au/news-web/_next/static/chunks/pages/_app-ee0c3be25bf60a06.js137 KB62 KB (45%)✓1st
https://www.abc.net.au/news-web/_next/static/chunks/de806afc-ff86fb48e79c66ff.js38 KB36 KB (97%)✓1st
https://www.abc.net.au/news-web/_next/static/chunks/773-68a625ac968832e2.js51 KB32 KB (65%)✓1st
https://www.abc.net.au/news-web/_next/static/chunks/main-f8430302b7586c39.js48 KB28 KB (60%)✓1st
https://siteintercept.qualtrics.com/dxjsmodule/12.1a2b7192fd54e87d3971.chunk.js?Q_CLIENTVERSION=2.46.0&Q_CLIENTTYPE=web&Q_BRANDID=www.abc.net.au36 KB27 KB (77%)✓3rd
https://www.abc.net.au/news-web/_next/static/chunks/7314-92fe9a6e72882682.js46 KB23 KB (51%)✓1st
https://www.abc.net.au/news-web/_next/static/chunks/framework-4a602498427f98ac.js59 KB22 KB (37%)✓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

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

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

B
Image Optimization
59 images, 0 KB saveable
REVIEW
59 images, 0 KB saveable
Warning::
is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
59 images 3.9 MB
0 oversized -0 KB
10 legacy format
1 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
5 fonts (78 KB)
PASS
5 fonts (78 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

78 KB total

Render-blocking

0

of 5

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 2.5 s LCP 11.4 shttps://static.abc-cdn.net.au/fonts/abcsansnova/20211112/abcsansnova-regular.woff2abcsansnova-regular.woff2 https://static.abc-cdn.net.au/fonts/abcsansnova/20211112/abcsansnova-regular.woff2 — 13.1 KiB — 0 ms — font-display: swaphttps://static.abc-cdn.net.au/fonts/abcsansnova/20211112/abcsansnova-bold.woff2abcsansnova-bold.woff2 https://static.abc-cdn.net.au/fonts/abcsansnova/20211112/abcsansnova-bold.woff2 — 12.6 KiB — 0 ms — font-display: swaphttps://static.abc-cdn.net.au/fonts/abcsansnova/20211112/abcsansnova-black.woff2abcsansnova-black.woff2 https://static.abc-cdn.net.au/fonts/abcsansnova/20211112/abcsansnova-black.woff2 — 13.1 KiB — 0 ms — font-display: swaphttps://static.abc-cdn.net.au/fonts/abcserif/abcserif-bold.woff2abcserif-bold.woff2 https://static.abc-cdn.net.au/fonts/abcserif/abcserif-bold.woff2 — 19.4 KiB — 0 ms — font-display: swaphttps://static.abc-cdn.net.au/fonts/abcserif/abcserif-regular.woff2abcserif-regular.woff2 https://static.abc-cdn.net.au/fonts/abcserif/abcserif-regular.woff2 — 19.8 KiB — 0 ms — font-display: swap
abcsansnova-regular.woff2 woff2 swap
Size 13 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
abcsansnova-bold.woff2 woff2 swap
Size 13 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
abcsansnova-black.woff2 woff2 swap
Size 13 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
abcserif-bold.woff2 woff2 swap
Size 19 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
abcserif-regular.woff2 woff2 swap
Size 20 KB
Load time 0 ms
Start 0 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 Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
48 hints, 0 missing preconnects
PASS
48 hints, 0 missing preconnects
Info::
Page uses 48 resource hint(s)

Current Resource Hints

preconnect
2
preload
+34
44
dns-prefetch
2
prefetch
—

48 resource hints configured

A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
A+
HTTP Caching
max-age=34 (34 seconds)
PASS
max-age=34 (34 seconds)
Info::
Cache-Control header is set
Got: public, max-age=34
Info::
Effective TTL: 34 seconds (max-age=34)
Info::
ETag present — enables conditional (304) responses
Cache-Control

public, max-age=34

DirectiveValueMeaning
public—Any cache may store this response
max-age34Cache for 34 seconds
Effective TTL: 34 seconds
Network Waterfall
150 requests over 0ms
INFO

Performance analysis not available for this result.

Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
46% of JavaScript execution is third-party
First-party Third-party 3316ms · 495KB · A$57/mo
Google Tag Manager
Tag Manager
Costly
Execution 1407ms
Transfer 185 KB
Unused 39%
Monthly Cost A$24/mo
Unattributable
Other
Costly
Execution 728ms
Transfer 0 KB
Monthly Cost A$13/mo
login.abc.net.au
Other
Costly
Execution 517ms
Transfer 239 KB
Unused 58%
Monthly Cost A$9/mo
login.abc.net.au
Other
Costly
Execution 207ms
Transfer 0 KB
Monthly Cost A$4/mo
siteintercept.qualtrics.com
Other
Optional
Execution 106ms
Transfer 36 KB
Unused 77%
Monthly Cost A$2/mo
static.chartbeat.com
Other
Optional
Execution 89ms
Transfer 25 KB
Monthly Cost A$2/mo
static.chartbeat.com
Other
Optional
Execution 83ms
Transfer 10 KB
Monthly Cost A$1/mo
login.abc.net.au
Other
Optional
Execution 74ms
Transfer 0 KB
Monthly Cost A$1/mo
login.abc.net.au
Other
Optional
Execution 52ms
Transfer 0 KB
Monthly Cost A$1/mo
login.abc.net.au
Other
Optional
Execution 52ms
Transfer 0 KB
Monthly Cost A$1/mo

These scripts may cost more than they're worth

  • Google Tag Manager adds 1407ms and costs ~A$24/month
  • Unattributable adds 728ms and costs ~A$13/month
  • login.abc.net.au adds 517ms and costs ~A$9/month
  • login.abc.net.au adds 207ms and costs ~A$4/month

46% of JavaScript execution time comes from third-party scripts.

Why this matters

Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.

Learn more ▾

Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.

Source: web.dev / HTTP Archive Web Almanac

Google Tag Manager takes 1407ms 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

Unattributable takes 728ms 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

login.abc.net.au takes 517ms 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

58% of login.abc.net.au'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

login.abc.net.au takes 207ms 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

77% of siteintercept.qualtrics.com'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

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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