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
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.
C
Main HTML Cache-Control
Action
Main HTML max-age=172800 (~2880min) is aggressive
REVIEW
Main HTML max-age=172800 (~2880min) is aggressive
Warning::
!
Main HTML cached for 2880 minutes -- risks stale auth / SPA state
Long max-age on the main HTML document means users may see outdated auth state, SPA shells, or A/B variants until the cache expires. Consider Cache-Control: no-cache (or max-age=300) for HTML and let your hashed assets (JS/CSS/images) carry the long cache instead.
Got: max-age=172800
B
JavaScript Blocking
1 JS blocking issue(s) detected
REVIEW
1 JS blocking issue(s) detected
Warning::
!
5 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.
A
Page Weight Budget
970 KB transferred, 51 requests
PASS
970 KB transferred, 51 requests
Info::
✓
Page weighs 2.1 MB (970 KB transferred)
Info::
i
51 HTTP requests
Info::
i
Estimated 0.20 g CO2 per page load
970 KBtransferred
51 requests
0.20 g CO2 per page load
Images443.8 KiB46%
JavaScript393.3 KiB41%
Fonts101.1 KiB10%
HTML20.1 KiB2%
Other5.7 KiB1%
Other4.2 KiB0%
Other1.7 KiB0%
Other466 B0%
CSS0 B0%
02.4 MB4.9 MB
Under budget
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
1 fonts (101 KB)
PASS
1 fonts (101 KB)
Info::
i
1 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
1
101 KB total
Render-blocking
0
of 1
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
boxicons.woff2woff2swap
Size101 KB
Load time31 ms
Start237 ms
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
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 ~51 KB and ~102 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
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+
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.
Whether the site is served from green-energy infrastructure
PASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
A
HTTP Caching
max-age=172800 (2 days)
PASS
max-age=172800 (2 days)
Info::
✓
Cache-Control header is set
Got: max-age=172800
Info::
✓
Effective TTL: 2 days (max-age=172800)
Info::
i
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control
max-age=172800
Directive
Value
Meaning
max-age
172800
Cache for 2 days
Effective TTL: 172800 seconds
Network Waterfall
51 requests over 1109ms
INFO
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
54%of JavaScript execution is third-party
First-party Third-party1311ms · 360KB · $23/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
blurbreimbursetrombone.com
blurbreimbursetrombone.com
Other
514ms
34 KB
—
$9/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
417ms
170 KB
39%
$7/mo
Costly
blurbreimbursetrombone.com
blurbreimbursetrombone.com
Other
226ms
32 KB
—
$4/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
155ms
125 KB
52%
$3/mo
Optional
blurbreimbursetrombone.com
Other
Costly
Execution514ms
Transfer34 KB
Monthly Cost$9/mo
Google Tag Manager
Tag Manager
Costly
Execution417ms
Transfer170 KB
Unused39%
Monthly Cost$7/mo
blurbreimbursetrombone.com
Other
Costly
Execution226ms
Transfer32 KB
Monthly Cost$4/mo
Google Tag Manager
Tag Manager
Optional
Execution155ms
Transfer125 KB
Unused52%
Monthly Cost$3/mo
These scripts may cost more than they're worth
blurbreimbursetrombone.com adds 514ms and costs ~$9/month
Google Tag Manager adds 417ms and costs ~$7/month
blurbreimbursetrombone.com adds 226ms and costs ~$4/month
54% 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
blurbreimbursetrombone.com takes 514ms 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 417ms 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
blurbreimbursetrombone.com takes 226ms 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 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.