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
28 images, 0 KB saveable
REVIEW
28 images, 0 KB saveable
Warning::
!
https://ni.scene7.com/is/content/ni/697750_EMR_NI_... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://ni.scene7.com/is/image/ni/20221101_10_0411... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://ni.scene7.com/is/image/ni/857200_cover_144... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://ni.scene7.com/is/image/ni/052024-NI-Connec... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://ni.scene7.com/is/image/ni/br?fmt=png-alpha is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
28images8.9 MB
0oversized-0 KB
8legacy format
5missing 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
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
6 fonts (429 KB)
PASS
6 fonts (429 KB)
Info::
i
6 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
6
429 KB total
Render-blocking
0
of 6
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
financier-display-web-r...woff2swap
Size42 KB
Load time98 ms
Start609 ms
RiskFOUT — text flashes from fallback to web font
FinancierDisplay-Medium...otfswap
Size166 KB
Load time176 ms
Start610 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
founders-grotesk-r-medi...woff2swap
Size34 KB
Load time130 ms
Start611 ms
RiskFOUT — text flashes from fallback to web font
founders-grotesk-r-regu...woff2swap
Size36 KB
Load time107 ms
Start612 ms
RiskFOUT — text flashes from fallback to web font
roboto-condensed-v13-la...woff2swap
Size62 KB
Load time111 ms
Start612 ms
RiskFOUT — text flashes from fallback to web font
SpaceMono-Regular.ttfttfswap
Size89 KB
Load time145 ms
Start612 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
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 ~160 KB and ~320 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
10 hints, 0 missing preconnects
PASS
10 hints, 0 missing preconnects
Info::
✓
Page uses 10 resource hint(s)
Current Resource Hints
preconnect—
preload
10
dns-prefetch—
prefetch—
10 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
118 requests over 3661ms
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-party8402ms · 1519KB · $48/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
www.ni.com
www.ni.com
Other
1518ms
20 KB
—
$9/mo
Costly
www.ni.com
www.ni.com
Other
1445ms
184 KB
42%
$8/mo
Costly
siteintercept.qualtrics.com
siteintercept.qualtrics.com
Other
1311ms
73 KB
75%
$8/mo
Costly
Unattributable
Unattributable
Other
955ms
0 KB
—
$5/mo
Costly
www.ni.com
www.ni.com
Other
770ms
92 KB
68%
$4/mo
Costly
js-cdn.dynatrace.com
js-cdn.dynatrace.com
Other
649ms
85 KB
39%
$4/mo
Costly
www.ni.com
www.ni.com
Other
494ms
152 KB
41%
$3/mo
Costly
siteintercept.qualtrics.com
siteintercept.qualtrics.com
Other
396ms
36 KB
99%
$2/mo
Costly
www.ni.com
www.ni.com
Other
333ms
149 KB
47%
$2/mo
Costly
www.ni.com
www.ni.com
Other
180ms
26 KB
—
$1/mo
Optional
www.ni.com
www.ni.com
Other
108ms
514 KB
53%
$1/mo
Optional
www.ni.com
www.ni.com
Other
83ms
7 KB
—
$0/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
83ms
144 KB
75%
$0/mo
Optional
www.ni.com
www.ni.com
Other
79ms
36 KB
66%
$0/mo
Optional
www.ni.com
Other
Costly
Execution1518ms
Transfer20 KB
Monthly Cost$9/mo
www.ni.com
Other
Costly
Execution1445ms
Transfer184 KB
Unused42%
Monthly Cost$8/mo
siteintercept.qualtrics.com
Other
Costly
Execution1311ms
Transfer73 KB
Unused75%
Monthly Cost$8/mo
Unattributable
Other
Costly
Execution955ms
Transfer0 KB
Monthly Cost$5/mo
www.ni.com
Other
Costly
Execution770ms
Transfer92 KB
Unused68%
Monthly Cost$4/mo
js-cdn.dynatrace.com
Other
Costly
Execution649ms
Transfer85 KB
Unused39%
Monthly Cost$4/mo
www.ni.com
Other
Costly
Execution494ms
Transfer152 KB
Unused41%
Monthly Cost$3/mo
siteintercept.qualtrics.com
Other
Costly
Execution396ms
Transfer36 KB
Unused99%
Monthly Cost$2/mo
www.ni.com
Other
Costly
Execution333ms
Transfer149 KB
Unused47%
Monthly Cost$2/mo
www.ni.com
Other
Optional
Execution180ms
Transfer26 KB
Monthly Cost$1/mo
www.ni.com
Other
Optional
Execution108ms
Transfer514 KB
Unused53%
Monthly Cost$1/mo
www.ni.com
Other
Optional
Execution83ms
Transfer7 KB
Monthly Cost$0/mo
Google Tag Manager
Tag Manager
Optional
Execution83ms
Transfer144 KB
Unused75%
Monthly Cost$0/mo
www.ni.com
Other
Optional
Execution79ms
Transfer36 KB
Unused66%
Monthly Cost$0/mo
These scripts may cost more than they're worth
www.ni.com adds 1518ms and costs ~$9/month
www.ni.com adds 1445ms and costs ~$8/month
siteintercept.qualtrics.com adds 1311ms and costs ~$8/month
Unattributable adds 955ms and costs ~$5/month
www.ni.com adds 770ms and costs ~$4/month
js-cdn.dynatrace.com adds 649ms and costs ~$4/month
www.ni.com adds 494ms and costs ~$3/month
siteintercept.qualtrics.com adds 396ms and costs ~$2/month
www.ni.com adds 333ms and costs ~$2/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.ni.com takes 1518ms 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.ni.com takes 1445ms 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
siteintercept.qualtrics.com takes 1311ms 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
75% 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
Unattributable takes 955ms 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.ni.com takes 770ms 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
68% of www.ni.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
js-cdn.dynatrace.com takes 649ms 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.ni.com takes 494ms 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
siteintercept.qualtrics.com takes 396ms 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
99% 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
www.ni.com takes 333ms 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
53% of www.ni.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
75% of Google Tag Manager'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
66% of www.ni.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.