JavaScript is 1.1 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.1 MB
Info::
i
71 HTTP requests
Info::
i
Estimated 0.40 g CO2 per page load
1.9 MBtransferred
71 requests
0.40 g CO2 per page load
JavaScript1.1 MiB60%
Images517.1 KiB27%
Fonts129.0 KiB7%
CSS75.6 KiB4%
HTML32.8 KiB2%
Other22.3 KiB1%
Other5.1 KiB0%
Other594 B0%
Other0 B0%
02.4 MB4.9 MB
Approaching limit
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
B
Third-Party Impact
55% third-party, 0 ms blocking
REVIEW
55% third-party, 0 ms blocking
Warning::
!
Third-party code accounts for 55% of page weight (1.0 MiB of 1.9 MiB)
Info::
✓
Third-party blocking time is low (0 ms)
45%
55%
First-party Third-party
C
Image Optimization
Action
29 images, 0 KB saveable
REVIEW
29 images, 0 KB saveable
Warning::
!
https://www.ssa.gov/themes/custom/ssa_core/logo.sv... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.ssa.gov/themes/custom/ssa_core/package... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.ssa.gov/themes/custom/ssa_core/package... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.ssa.gov/themes/custom/ssa_core/package... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.ssa.gov/themes/custom/ssa_core/package... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.ssa.gov/themes/custom/ssa_core/package... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.ssa.gov/themes/custom/ssa_core/package... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.ssa.gov/themes/custom/ssa_core/package... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
29images517 KB
0oversized-0 KB
29legacy format
8missing 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
C
Compression Algorithm
Action
Main response served uncompressed
REVIEW
Main response served uncompressed
Info::
i
Main HTML response has no Content-Encoding (uncompressed)
The main HTML document is served without compression. The Text Compression section above lists the broader picture; for the main response specifically, even gzip would shave ~70-80% off most text payloads.
B
JavaScript Blocking
1 JS blocking issue(s) detected
REVIEW
1 JS blocking issue(s) detected
Warning::
!
8 render-blocking <script src> tag(s) without async/defer
Each `<script src=...>` without `async`, `defer`, or `type="module"` blocks HTML parsing while the browser fetches and executes it. The block lasts the entire round-trip + execution time -- on slow networks this translates directly into LCP delay. Add `defer` (executes after parse, in source order) for scripts that interact with the DOM, or `async` (executes whenever ready) for analytics / independent scripts. Module scripts (`type="module"`) are deferred by default.
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW
Green Hosting
No green hosting detected
B
HTTP Caching
max-age=0, no-cache
REVIEW
max-age=0, no-cache
Info::
✓
Cache-Control header is set
Got: max-age=0, no-cache
Info::
i
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control
max-age=0, no-cache
Directive
Value
Meaning
max-age
0
Cache for 0 seconds
no-cache
—
Cache but always revalidate first
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 (129 KB)
PASS
5 fonts (129 KB)
Info::
i
5 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
5
129 KB total
Render-blocking
0
of 5
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
PublicSans-Bold.woff2woff2swap
Size32 KB
Load time60 ms
Start167 ms
RiskFOUT — text flashes from fallback to web font
PublicSans-SemiBold.woff2woff2swap
Size32 KB
Load time66 ms
Start168 ms
RiskFOUT — text flashes from fallback to web font
PublicSans-Regular.woff2woff2swap
Size32 KB
Load time64 ms
Start168 ms
RiskFOUT — text flashes from fallback to web font
PublicSans-Italic.woff2woff2swap
Size32 KB
Load time147 ms
Start666 ms
RiskFOUT — text flashes from fallback to web font
slick.woffwoffswap
Size1 KB
Load time26 ms
Start666 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)
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
1 hints, 0 missing preconnects
PASS
1 hints, 0 missing preconnects
Info::
✓
Page uses 1 resource hint(s)
Current Resource Hints
preconnect—
preload
1
dns-prefetch—
prefetch—
1 resource hints configured
A+
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
PASS
HTTP/3 advertised via Alt-Svc
Info::
✓
HTTP/3 (QUIC) is supported
First-load mobile users on cellular networks see meaningful latency improvements with HTTP/3. The QUIC transport collapses TLS + TCP handshakes into one and recovers faster from packet loss.
A+
LCP Image Preload
LCP preload audit not available
PASS
LCP preload audit not available
Info::
✓
LCP image preload audit not available for this scan
A+
Main HTML Cache-Control
Main HTML uses no-cache -- safe revalidate-on-request policy
PASS
Main HTML uses no-cache -- safe revalidate-on-request policy
Info::
✓
Main HTML uses no-cache -- safe revalidate-on-request policy
Got: max-age=0, no-cache
A+
Server-Timing Observability
3 Server-Timing entries advertised
PASS
3 Server-Timing entries advertised
Info::
✓
Server-Timing header advertises 3 timing entries
A+
Server Response Intelligence
1 server-response signal(s) detected
PASS
1 server-response signal(s) detected
Info::
i
No `ETag` or `Last-Modified` -- conditional GET not supported
Without either header, browsers can't issue conditional GETs and refresh always re-downloads the full response body even when nothing changed. Add `ETag: "<hash>"` (or `Last-Modified: <date>`) on cacheable responses; the server returns 304 Not Modified when the client's cached copy is still valid, saving bandwidth.
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+
CSS Performance Depth
No CSS performance depth issues detected
PASS
No CSS performance depth issues detected
Info::
✓
No CSS performance depth issues detected
Network Waterfall
71 requests over 2305ms
INFO
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
52%of JavaScript execution is third-party
First-party Third-party1392ms · 884KB · $18/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
Google Tag Manager
www.googletagmanager.com
Tag Manager
242ms
137 KB
44%
$3/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
221ms
165 KB
42%
$3/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
215ms
149 KB
43%
$3/mo
Costly
resources.digital-cloud-gov.medallia.com
resources.digital-cloud-gov.medallia.com
Other
199ms
81 KB
45%
$3/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
172ms
118 KB
53%
$2/mo
Optional
js-agent.newrelic.com
js-agent.newrelic.com
Other
159ms
19 KB
—
$2/mo
Optional
dap.digitalgov.gov
dap.digitalgov.gov
Other
73ms
10 KB
—
$1/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
56ms
149 KB
72%
$1/mo
Optional
s.go-mpulse.net
s.go-mpulse.net
Other
55ms
57 KB
65%
$1/mo
Optional
Google Tag Manager
Tag Manager
Costly
Execution242ms
Transfer137 KB
Unused44%
Monthly Cost$3/mo
Google Tag Manager
Tag Manager
Costly
Execution221ms
Transfer165 KB
Unused42%
Monthly Cost$3/mo
Google Tag Manager
Tag Manager
Costly
Execution215ms
Transfer149 KB
Unused43%
Monthly Cost$3/mo
resources.digital-cloud-gov.medallia.com
Other
Optional
Execution199ms
Transfer81 KB
Unused45%
Monthly Cost$3/mo
Google Tag Manager
Tag Manager
Optional
Execution172ms
Transfer118 KB
Unused53%
Monthly Cost$2/mo
js-agent.newrelic.com
Other
Optional
Execution159ms
Transfer19 KB
Monthly Cost$2/mo
dap.digitalgov.gov
Other
Optional
Execution73ms
Transfer10 KB
Monthly Cost$1/mo
Google Tag Manager
Tag Manager
Optional
Execution56ms
Transfer149 KB
Unused72%
Monthly Cost$1/mo
s.go-mpulse.net
Other
Optional
Execution55ms
Transfer57 KB
Unused65%
Monthly Cost$1/mo
These scripts may cost more than they're worth
Google Tag Manager adds 242ms and costs ~$3/month
Google Tag Manager adds 221ms and costs ~$3/month
Google Tag Manager adds 215ms and costs ~$3/month
52% 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 242ms 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 221ms 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 215ms 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 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
72% 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
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.