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
21 images, 0 KB saveable
REVIEW
21 images, 0 KB saveable
Warning::
!
https://assets.propublica.org/static/prod/v5/image... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets.propublica.org/static/prod/v4/image... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets.propublica.org/static/prod/v4/image... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets.propublica.org/static/prod/v5/image... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
21images610 KB
0oversized-0 KB
4legacy format
4missing 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
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 (164 KB)
PASS
7 fonts (164 KB)
Info::
i
7 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
7
164 KB total
Render-blocking
0
of 7
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
TiemposTextWeb-Regular_...woff2swap
Size28 KB
Load time165 ms
Start1.1 s
RiskFOUT — text flashes from fallback to web font
Graphik-Bold-Web_defaul...woff2swap
Size18 KB
Load time198 ms
Start1.1 s
RiskFOUT — text flashes from fallback to web font
TiemposTextWeb-Bold_def...woff2swap
Size29 KB
Load time182 ms
Start1.1 s
RiskFOUT — text flashes from fallback to web font
Graphik-Regular-Web_def...woff2swap
Size16 KB
Load time182 ms
Start1.1 s
RiskFOUT — text flashes from fallback to web font
TiemposHeadlineWeb-Blac...woff2swap
Size19 KB
Load time199 ms
Start1.1 s
RiskFOUT — text flashes from fallback to web font
TiemposHeadlineWeb-Bold...woff2swap
Size20 KB
Load time200 ms
Start1.1 s
RiskFOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a...woff2swap
Size34 KB
Load time78 ms
Start1.8 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)
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
6 hints, 0 missing preconnects
PASS
6 hints, 0 missing preconnects
Info::
✓
Page uses 6 resource hint(s)
Current Resource Hints
preconnect
1
preload—
dns-prefetch
5
prefetch—
6 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
115 requests over 2541ms
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-party4273ms · 1313KB · $24/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
www.gstatic.com
www.gstatic.com
Other
1057ms
0 KB
43%
$6/mo
Costly
Unattributable
Unattributable
Other
750ms
0 KB
—
$4/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
418ms
142 KB
43%
$2/mo
Costly
www.propublica.org
www.propublica.org
Other
358ms
84 KB
58%
$2/mo
Costly
www.propublica.org
www.propublica.org
Other
335ms
44 KB
—
$2/mo
Costly
cdn-4.convertexperiments.com
cdn-4.convertexperiments.com
Other
318ms
57 KB
35%
$2/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
292ms
177 KB
39%
$2/mo
Costly
www.propublica.org
www.propublica.org
Other
140ms
250 KB
83%
$1/mo
Optional
www.propublica.org
www.propublica.org
Other
116ms
221 KB
80%
$1/mo
Optional
www.propublica.org
www.propublica.org
Other
84ms
41 KB
—
$0/mo
Optional
www.propublica.org
www.propublica.org
Other
73ms
39 KB
62%
$0/mo
Optional
ak.sail-horizon.com
ak.sail-horizon.com
Other
72ms
48 KB
68%
$0/mo
Optional
www.propublica.org
www.propublica.org
Other
70ms
62 KB
65%
$0/mo
Optional
cdn.parsely.com
cdn.parsely.com
Other
68ms
21 KB
—
$0/mo
Optional
Google Analytics
www.google-analytics.com
Analytics
68ms
21 KB
—
$0/mo
Optional
www.propublica.org
www.propublica.org
Other
55ms
106 KB
84%
$0/mo
Optional
www.gstatic.com
Other
Costly
Execution1057ms
Transfer0 KB
Unused43%
Monthly Cost$6/mo
Unattributable
Other
Costly
Execution750ms
Transfer0 KB
Monthly Cost$4/mo
Google Tag Manager
Tag Manager
Costly
Execution418ms
Transfer142 KB
Unused43%
Monthly Cost$2/mo
www.propublica.org
Other
Costly
Execution358ms
Transfer84 KB
Unused58%
Monthly Cost$2/mo
www.propublica.org
Other
Costly
Execution335ms
Transfer44 KB
Monthly Cost$2/mo
cdn-4.convertexperiments.com
Other
Costly
Execution318ms
Transfer57 KB
Unused35%
Monthly Cost$2/mo
Google Tag Manager
Tag Manager
Costly
Execution292ms
Transfer177 KB
Unused39%
Monthly Cost$2/mo
www.propublica.org
Other
Optional
Execution140ms
Transfer250 KB
Unused83%
Monthly Cost$1/mo
www.propublica.org
Other
Optional
Execution116ms
Transfer221 KB
Unused80%
Monthly Cost$1/mo
www.propublica.org
Other
Optional
Execution84ms
Transfer41 KB
Monthly Cost$0/mo
www.propublica.org
Other
Optional
Execution73ms
Transfer39 KB
Unused62%
Monthly Cost$0/mo
ak.sail-horizon.com
Other
Optional
Execution72ms
Transfer48 KB
Unused68%
Monthly Cost$0/mo
www.propublica.org
Other
Optional
Execution70ms
Transfer62 KB
Unused65%
Monthly Cost$0/mo
cdn.parsely.com
Other
Optional
Execution68ms
Transfer21 KB
Monthly Cost$0/mo
Google Analytics
Analytics
Optional
Execution68ms
Transfer21 KB
Monthly Cost$0/mo
www.propublica.org
Other
Optional
Execution55ms
Transfer106 KB
Unused84%
Monthly Cost$0/mo
These scripts may cost more than they're worth
www.gstatic.com adds 1057ms and costs ~$6/month
Unattributable adds 750ms and costs ~$4/month
Google Tag Manager adds 418ms and costs ~$2/month
www.propublica.org adds 358ms and costs ~$2/month
www.propublica.org adds 335ms and costs ~$2/month
cdn-4.convertexperiments.com adds 318ms and costs ~$2/month
Google Tag Manager adds 292ms 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.gstatic.com takes 1057ms 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 750ms 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 418ms 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.propublica.org takes 358ms 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 www.propublica.org'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.propublica.org takes 335ms 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
cdn-4.convertexperiments.com takes 318ms 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 292ms 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
83% of www.propublica.org'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
80% of www.propublica.org'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
62% of www.propublica.org'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
68% of ak.sail-horizon.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 www.propublica.org'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
84% of www.propublica.org'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.