Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
C
Image Optimization
Action
36 images, 0 KB saveable
REVIEW
36 images, 0 KB saveable
Warning::
!
https://images.acer.com/is/image/acer/logo-spatial... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images.acer.com/is/image/acer/browse-popul... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images.acer.com/is/image/acer/browse-popul... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images.acer.com/is/image/acer/logo-aopen is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images.acer.com/is/image/acer/Banner_Windo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images.acer.com/is/content/acer/acer-4 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images.acer.com/is/image/acer/nitro-radeon... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images.acer.com/is/image/acer/logo-acerpur... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images.acer.com/is/image/acer/Menu_display... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images.acer.com/is/image/acer/browse-popul... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images.acer.com/is/image/acer/browse-popul... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images.acer.com/is/image/acer/logo-acer is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images.acer.com/is/image/acer/logo-predato... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images.acer.com/is/image/acer/logo-planet9 is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images.acer.com/is/image/acer/Lifestyle_1-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images.acer.com/is/image/acer/browse-popul... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images.acer.com/is/image/acer/logo-altos-b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images.acer.com/is/image/acer/Projector_En... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images.acer.com/is/image/acer/AMD_entry_po... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
36images2.5 MB
0oversized-0 KB
8legacy format
19missing dimensionsCLS risk
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
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 (71 KB)
PASS
5 fonts (71 KB)
Info::
i
5 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
5
71 KB total
Render-blocking
0
of 5
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
Noto-Sans-regular.woffwoffswap
Size13 KB
Load time7 ms
Start1.1 s
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
o-0NIpQlx3QUlC5A4PNjOhB...woff2swap
Size14 KB
Load time27 ms
Start1.1 s
RiskFOUT — text flashes from fallback to web font
o-0NIpQlx3QUlC5A4PNjXhF...woff2swap
Size14 KB
Load time33 ms
Start1.1 s
RiskFOUT — text flashes from fallback to web font
acer-icons.ttfttfswap
Size16 KB
Load time3 ms
Start1.1 s
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
o-0IIpQlx3QUlC5A4PNr5TR...woff2swap
Size14 KB
Load time26 ms
Start1.2 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 ~9 KB and ~18 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
No optimization needed
PASS
No optimization needed
Info::
✓
No resource hint issues
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
98 requests over 2720ms
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-party5609ms · 1401KB · $74/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
www.acer.com
www.acer.com
Other
1893ms
52 KB
—
$25/mo
Costly
Unattributable
Unattributable
Other
1021ms
0 KB
—
$14/mo
Costly
www.acer.com
www.acer.com
Other
687ms
1 KB
22%
$9/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
395ms
201 KB
38%
$5/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
309ms
168 KB
49%
$4/mo
Costly
static.acer.com
static.acer.com
Other
304ms
261 KB
90%
$4/mo
Costly
cdn-apac.onetrust.com
cdn-apac.onetrust.com
Other
255ms
119 KB
52%
$3/mo
Costly
js-agent.newrelic.com
js-agent.newrelic.com
Other
179ms
30 KB
—
$2/mo
Optional
www.gstatic.com
www.gstatic.com
Other
153ms
362 KB
67%
$2/mo
Optional
www.acer.com
www.acer.com
Other
144ms
10 KB
—
$2/mo
Optional
static.acer.com
static.acer.com
Other
91ms
28 KB
95%
$1/mo
Optional
s.go-mpulse.net
s.go-mpulse.net
Other
67ms
57 KB
65%
$1/mo
Optional
static.acer.com
static.acer.com
Other
58ms
111 KB
—
$1/mo
Optional
static.acer.com
static.acer.com
Other
54ms
1 KB
—
$1/mo
Optional
www.acer.com
Other
Costly
Execution1893ms
Transfer52 KB
Monthly Cost$25/mo
Unattributable
Other
Costly
Execution1021ms
Transfer0 KB
Monthly Cost$14/mo
www.acer.com
Other
Costly
Execution687ms
Transfer1 KB
Unused22%
Monthly Cost$9/mo
Google Tag Manager
Tag Manager
Costly
Execution395ms
Transfer201 KB
Unused38%
Monthly Cost$5/mo
Google Tag Manager
Tag Manager
Costly
Execution309ms
Transfer168 KB
Unused49%
Monthly Cost$4/mo
static.acer.com
Other
Costly
Execution304ms
Transfer261 KB
Unused90%
Monthly Cost$4/mo
cdn-apac.onetrust.com
Other
Costly
Execution255ms
Transfer119 KB
Unused52%
Monthly Cost$3/mo
js-agent.newrelic.com
Other
Optional
Execution179ms
Transfer30 KB
Monthly Cost$2/mo
www.gstatic.com
Other
Optional
Execution153ms
Transfer362 KB
Unused67%
Monthly Cost$2/mo
www.acer.com
Other
Optional
Execution144ms
Transfer10 KB
Monthly Cost$2/mo
static.acer.com
Other
Optional
Execution91ms
Transfer28 KB
Unused95%
Monthly Cost$1/mo
s.go-mpulse.net
Other
Optional
Execution67ms
Transfer57 KB
Unused65%
Monthly Cost$1/mo
static.acer.com
Other
Optional
Execution58ms
Transfer111 KB
Monthly Cost$1/mo
static.acer.com
Other
Optional
Execution54ms
Transfer1 KB
Monthly Cost$1/mo
These scripts may cost more than they're worth
www.acer.com adds 1893ms and costs ~$25/month
Unattributable adds 1021ms and costs ~$14/month
www.acer.com adds 687ms and costs ~$9/month
Google Tag Manager adds 395ms and costs ~$5/month
Google Tag Manager adds 309ms and costs ~$4/month
static.acer.com adds 304ms and costs ~$4/month
cdn-apac.onetrust.com adds 255ms 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.acer.com takes 1893ms 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 1021ms 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
www.acer.com takes 687ms 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
Google Tag Manager takes 395ms 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
Google Tag Manager takes 309ms 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.acer.com takes 304ms 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
90% of static.acer.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
cdn-apac.onetrust.com takes 255ms 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
52% of cdn-apac.onetrust.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
67% of www.gstatic.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
95% of static.acer.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
65% of s.go-mpulse.net'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.