Skip to content
https://Alltaxbooks.com

Performance

· 22 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
94
GRADE
A
FIX
0
REVIEW
5
PASS
14
INFO
3

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
77
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
92
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

926 ms

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

1.01 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

0 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.450

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

926 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

1.01 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
22
14 PASS 5 REVIEW
C
Image Optimization
Action
10 images, 0 KB saveable
REVIEW
10 images, 0 KB saveable
Warning::
https://alltaxbooks.com/badges/intuit-bookkeeping.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://alltaxbooks.com/badges/gusto-payroll.jpg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://alltaxbooks.com/badges/intuit-proadvisor-s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://alltaxbooks.com/badges/qb-online-level-1.j... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://alltaxbooks.com/badges/qb-desktop.jpg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
10 images 687 KB
0 oversized -0 KB
7 legacy format
5 missing dimensions CLS 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

B
HTTP/3 (QUIC)
HTTP/3 not advertised
REVIEW
HTTP/3 not advertised
Info::
HTTP/3 (QUIC) is not advertised
HTTP/3 isn't advertised via Alt-Svc and the worker didn't negotiate h3. HTTP/3 reduces handshake latency (1-RTT instead of 2-3 RTTs) and is more resilient on lossy connections. Most modern CDNs (Cloudflare, Fastly, AWS CloudFront, Google Cloud CDN) support HTTP/3 with a single config switch -- consider enabling for mobile-heavy workloads.
B
Server-Timing Observability
No Server-Timing header found
REVIEW
No Server-Timing header found
Info::
No Server-Timing header found
Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

B
HTTP Caching
public,max-age=0,must-revalidate
REVIEW
public,max-age=0,must-revalidate
Info::
Cache-Control header is set
Got: public,max-age=0,must-revalidate
Info::
ETag present — enables conditional (304) responses
Cache-Control

public,max-age=0,must-revalidate

DirectiveValueMeaning
public—Any cache may store this response
max-age0Cache for 0 seconds
must-revalidate—Must recheck with server after expiry
A
Page Weight Budget
906 KB transferred, 17 requests
PASS
906 KB transferred, 17 requests
Info::
Page weighs 974 KB (906 KB transferred)
Info::
17 HTTP requests
Info::
Estimated 0.19 g CO2 per page load
906 KB / 2.4 MB budget
906 KB transferred
17 requests
0.19 g CO2 per page load
Images 687.5 KiB 76%
Fonts 139.7 KiB 15%
Other 58.2 KiB 6%
HTML 8.9 KiB 1%
CSS 8.4 KiB 1%
JavaScript 3.4 KiB 0%
0 2.4 MB 4.9 MB
Under budget
A+
Third-Party Impact
16% third-party, 0 ms blocking
PASS
16% third-party, 0 ms blocking
Info::
Third-party code accounts for 16% of page weight (141.2 KiB of 906.1 KiB)
Info::
Third-party blocking time is low (0 ms)
84%
16%
First-party Third-party
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+
JS Execution Cost
210ms total JS execution
PASS
210ms total JS execution
Info::
https://alltaxbooks.com/: 210ms CPU time

Main Thread Breakdown

Style & Layout 57% Other 29% Rendering 6% Script Evaluation 6%
ScriptTotalScriptingParse/CompileParty
https://alltaxbooks.com/210ms3ms0ms1st
A+
Font Loading
2 fonts (140 KB)
PASS
2 fonts (140 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

140 KB total

Render-blocking

0

of 2

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 926 ms LCP 1.0 shttps://fonts.gstatic.com/l/font?kit=nwp0tKy2OAdR1K-IwhWudF-R9QMylBJAV3Bo8Ky46zMG3NriAjTH0DrIkXSPBw-KkViNHQ&skey=1497ac707ba83cff&v=v19font https://fonts.gstatic.com/l/font?kit=nwp0tKy2OAdR1K-IwhWudF-R9QMylBJAV3Bo8Ky46zMG3NriAjTH0DrIkXSPBw-KkViNHQ&skey=1497ac707ba83cff&v=v19 — 30.7 KiB — 17 ms — font-display: swaphttps://fonts.gstatic.com/l/font?kit=u-500qyriQwlOrhSvowK_l5UcA6zuSYEqOzpPe3HOZJ5eX1WtLaQwmYiScCmDxhtNOKl8yDr3idIGHUE8mlpZ6LEelP_XSR53nLDFBI&skey=379c1eccf863c625&v=v33font https://fonts.gstatic.com/l/font?kit=u-500qyriQwlOrhSvowK_l5UcA6zuSYEqOzpPe3HOZJ5eX1WtLaQwmYiScCmDxhtNOKl8yDr3idIGHUE8mlpZ6LEelP_XSR53nLDFBI&skey=379c1eccf863c625&v=v33 — 109.0 KiB — 17 ms — font-display: swap
font unknown swap
Size 31 KB
Load time 17 ms
Start 428 ms
Risk FOUT — text flashes from fallback to web font
font unknown swap
Size 109 KB
Load time 17 ms
Start 429 ms
Risk FOUT — 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 ~96 KB and ~192 ms

A+
JS Bundles
1 scripts, 0 KB unused
PASS
1 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://alltaxbooks.com/script.js3 KB—✓1st
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+
Document Compression
Document response uses brotli
PASS
Document response uses brotli
Info::
Main HTML response uses brotli (Content-Encoding: br)
Brotli is the best text-compression algorithm for general use, ~20% smaller than gzip on average (40% on smaller files). Modern browsers all support it.
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 max-age=0 (≤ 5min) is appropriate
PASS
Main HTML max-age=0 (≤ 5min) is appropriate
Info::
Main HTML max-age=0 (≤ 5min) is appropriate
Got: public,max-age=0,must-revalidate
A+
Server Response Intelligence
3 server-response signal(s) detected
PASS
3 server-response signal(s) detected
Info::
`Cache-Status` header present (RFC 9211): "Netlify Edge"; fwd=miss; fwd-status=200; stored
The page returns a `Cache-Status` header -- the standardized way for CDNs and caches to communicate per-hop cache state to debugging tools. Format: `Cache-Status: cdn-name; hit; ttl=300` (or `; fwd=miss` / `; fwd=stale`). Standard alternative to vendor-specific `X-Cache` patterns each CDN had historically. Cloudflare, Fastly, and Akamai all support emitting it.
Info::
`Vary` header declared: Accept-Encoding
The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).
Info::
`ETag` present -- conditional GET supported
A+
Page Weight Inventory
17 resources · 906 KB · 0 KB savings available
PASS
17 resources · 906 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 906 KB
Info::
3 third-party resources (16% of weight)
Info::
1 resources over 200KB
17 resources · 906.1 KiB · 3 third-party Within 1MB page-weight target
Image 82% · 745.6 KiB
Font 15% · 139.7 KiB
Document 1% · 8.9 KiB
CSS 1% · 8.4 KiB
JavaScript 0% · 3.4 KiB
Asset Compression
No text asset hosts to measure
INFO
No text asset hosts to measure
Info::
No third-party or subdomain host served enough text assets to measure
Asset compression is measured per host, from one HEAD request against a sampled resource. Pages that serve all their JS and CSS from the document's own origin are covered by the document compression check instead.
Network Waterfall
17 requests over 702ms
INFO
0 ms 500 ms 1.0 s FCP 926 ms LCP 1.0 shttps://alltaxbooks.com// https://alltaxbooks.com/ — 200 — 8.9 KiB — 155 ms — h2https://fonts.googleapis.com/css2?family=Merriweather:wght@400;700&family=Source+Sans+3:wght@400;500;600;700&display=swapfonts.googleapis.com/css2?family=Me... https://fonts.googleapis.com/css2?family=Merriweather:wght@400;700&family=Source+Sans+3:wght@400;500;600;700&display=swap — 200 — 1.5 KiB — 118 ms — h2https://alltaxbooks.com/styles.css?v=20260622e/styles.css?v=20260622e https://alltaxbooks.com/styles.css?v=20260622e — 200 — 6.9 KiB — 135 ms — h2https://alltaxbooks.com/script.js/script.js https://alltaxbooks.com/script.js — 200 — 3.4 KiB — 136 ms — h2https://alltaxbooks.com/logo.jpg/logo.jpg https://alltaxbooks.com/logo.jpg — 200 — 289.3 KiB — 163 ms — h2https://alltaxbooks.com/images/hero-01.webp/images/hero-01.webp https://alltaxbooks.com/images/hero-01.webp — 404 — 5.6 KiB — 159 ms — h2https://alltaxbooks.com/badges/intuit-proadvisor-silver.jpg/badges/intuit-proadvisor-silver.jp... https://alltaxbooks.com/badges/intuit-proadvisor-silver.jpg — 200 — 26.5 KiB — 135 ms — h2https://alltaxbooks.com/badges/qb-online-level-1.jpg/badges/qb-online-level-1.jpg https://alltaxbooks.com/badges/qb-online-level-1.jpg — 200 — 45.9 KiB — 154 ms — h2https://alltaxbooks.com/badges/qb-desktop.jpg/badges/qb-desktop.jpg https://alltaxbooks.com/badges/qb-desktop.jpg — 200 — 44.4 KiB — 156 ms — h2https://alltaxbooks.com/badges/intuit-bookkeeping.jpg/badges/intuit-bookkeeping.jpg https://alltaxbooks.com/badges/intuit-bookkeeping.jpg — 200 — 34.3 KiB — 151 ms — h2https://alltaxbooks.com/badges/gusto-payroll.jpg/badges/gusto-payroll.jpg https://alltaxbooks.com/badges/gusto-payroll.jpg — 200 — 30.7 KiB — 149 ms — h2https://alltaxbooks.com/images/tax-01.webp/images/tax-01.webp https://alltaxbooks.com/images/tax-01.webp — 200 — 53.3 KiB — 258 ms — h2https://alltaxbooks.com/images/imm-01.webp/images/imm-01.webp https://alltaxbooks.com/images/imm-01.webp — 200 — 125.0 KiB — 146 ms — h2https://alltaxbooks.com/images/notary-02.webp/images/notary-02.webp https://alltaxbooks.com/images/notary-02.webp — 200 — 32.6 KiB — 274 ms — h2https://fonts.gstatic.com/l/font?kit=nwp0tKy2OAdR1K-IwhWudF-R9QMylBJAV3Bo8Ky46zMG3NriAjTH0DrIkXSPBw-KkViNHQ&skey=1497ac707ba83cff&v=v19fonts.gstatic.com/l/font?kit=nwp0tK... https://fonts.gstatic.com/l/font?kit=nwp0tKy2OAdR1K-IwhWudF-R9QMylBJAV3Bo8Ky46zMG3NriAjTH0DrIkXSPBw-KkViNHQ&skey=1497ac707ba83cff&v=v19 — 200 — 30.7 KiB — 17 ms — h3https://fonts.gstatic.com/l/font?kit=u-500qyriQwlOrhSvowK_l5UcA6zuSYEqOzpPe3HOZJ5eX1WtLaQwmYiScCmDxhtNOKl8yDr3idIGHUE8mlpZ6LEelP_XSR53nLDFBI&skey=379c1eccf863c625&v=v33fonts.gstatic.com/l/font?kit=u-500q... https://fonts.gstatic.com/l/font?kit=u-500qyriQwlOrhSvowK_l5UcA6zuSYEqOzpPe3HOZJ5eX1WtLaQwmYiScCmDxhtNOKl8yDr3idIGHUE8mlpZ6LEelP_XSR53nLDFBI&skey=379c1eccf863c625&v=v33 — 200 — 109.0 KiB — 17 ms — h3https://alltaxbooks.com/favicon.ico/favicon.ico https://alltaxbooks.com/favicon.ico — 200 — 58.2 KiB — 138 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization
10 images, 470 KB total, 465 KB wasted
INFO

Image Optimization Audit

Total Images

10

Total Size

470 KB

Oversized

6

Wasted

465 KB

9 missing dimensions 1 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

Send Feedback