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
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
7 fonts (955 KB)
PASS
7 fonts (955 KB)
Info::
i
7 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
7
955 KB total
Render-blocking
0
of 7
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
lexend-deca-latin.woff2woff2swap
Size39 KB
Load time140 ms
Start1.4 s
RiskFOUT — text flashes from fallback to web font
custom-icons.woff2woff2swap
Size2 KB
Load time64 ms
Start1.4 s
RiskFOUT — text flashes from fallback to web font
fa-regular-400.woff2woff2swap
Size416 KB
Load time224 ms
Start1.4 s
RiskFOUT — text flashes from fallback to web font
Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
fa-solid-900.woff2woff2swap
Size346 KB
Load time463 ms
Start1.4 s
RiskFOUT — text flashes from fallback to web font
Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
fa-brands-400.woff2woff2swap
Size117 KB
Load time274 ms
Start1.4 s
RiskFOUT — text flashes from fallback to web font
Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
KFO7CnqEu92Fr1ME7kSn66a...woff2swap
Size34 KB
Load time76 ms
Start1.6 s
RiskFOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a...woff2swap
Size0 KB
Load time0 ms
Start10.0 s
RiskFOUT — 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)
Fixing the unchecked items could save ~440 KB and ~880 ms
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
13 hints, 0 missing preconnects
PASS
13 hints, 0 missing preconnects
Info::
✓
Page uses 13 resource hint(s)
Current Resource Hints
preconnect
5
preload
8
dns-prefetch—
prefetch—
13 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
Network Waterfall
65 requests over 10955ms
INFO
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100%of JavaScript execution is third-party
First-party Third-party2312ms · 365KB · £24/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
www.abdn.ac.uk
www.abdn.ac.uk
Other
1214ms
12 KB
—
£13/mo
Costly
Unattributable
Unattributable
Other
351ms
0 KB
—
£4/mo
Costly
code.jquery.com
code.jquery.com
Other
290ms
31 KB
—
£3/mo
Costly
cc.cdn.civiccomputing.com
cc.cdn.civiccomputing.com
Other
182ms
123 KB
46%
£2/mo
Optional
www.abdn.ac.uk
www.abdn.ac.uk
Other
110ms
5 KB
—
£1/mo
Optional
www.abdn.ac.uk
www.abdn.ac.uk
Other
98ms
146 KB
—
£1/mo
Optional
www.abdn.ac.uk
www.abdn.ac.uk
Other
68ms
48 KB
69%
£1/mo
Optional
www.abdn.ac.uk
Other
Costly
Execution1214ms
Transfer12 KB
Monthly Cost£13/mo
Unattributable
Other
Costly
Execution351ms
Transfer0 KB
Monthly Cost£4/mo
code.jquery.com
Other
Costly
Execution290ms
Transfer31 KB
Monthly Cost£3/mo
cc.cdn.civiccomputing.com
Other
Optional
Execution182ms
Transfer123 KB
Unused46%
Monthly Cost£2/mo
www.abdn.ac.uk
Other
Optional
Execution110ms
Transfer5 KB
Monthly Cost£1/mo
www.abdn.ac.uk
Other
Optional
Execution98ms
Transfer146 KB
Monthly Cost£1/mo
www.abdn.ac.uk
Other
Optional
Execution68ms
Transfer48 KB
Unused69%
Monthly Cost£1/mo
These scripts may cost more than they're worth
www.abdn.ac.uk adds 1214ms and costs ~£13/month
Unattributable adds 351ms and costs ~£4/month
code.jquery.com adds 290ms and costs ~£3/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
Why this matters
When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.
Learn more ▾▴
Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.
Source: web.dev
www.abdn.ac.uk takes 1214ms 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 351ms 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
code.jquery.com takes 290ms 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
69% of www.abdn.ac.uk'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.