Skip to content
https://nymeriarosebooks.com

Performance

· 26 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
87
GRADE
B
FIX
1
REVIEW
8
PASS
14
INFO
3

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

Mobile Desktop
79
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
84
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
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.

2.09 s

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

2.09 s

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

26 ms

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

0.337

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

3.57 s

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

2.27 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
26
14 PASS 8 REVIEW 1 FIX
F
Page Weight Budget
Action
4.4 MB transferred, 22 requests
FIX
4.4 MB transferred, 22 requests
Critical::
Page weighs 4.8 MB (4.4 MB transferred)
Warning::
Images are 4.0 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 4.0 MB
Info::
Fonts are 245 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 245 KB
Info::
22 HTTP requests
Info::
Estimated 0.93 g CO2 per page load
4.4 MB / 2.4 MB budget
4.4 MB transferred
22 requests
0.93 g CO2 per page load
Images 4.0 MiB 90%
Fonts 245.2 KiB 5%
JavaScript 198.6 KiB 4%
CSS 16.2 KiB 0%
HTML 999 B 0%
Other 543 B 0%
0 2.4 MB 4.9 MB
Over budget

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

B
JS Execution Cost
889ms total JS execution
REVIEW
889ms total JS execution
Warning::
https://nymeriarosebooks.com/: 442ms CPU time
Warning::
Unattributable: 279ms CPU time
Info::
https://nymeriarosebooks.com/assets/index-en2yPdgV...: 168ms CPU time

Main Thread Breakdown

Other 37% Style & Layout 34% Script Evaluation 18% Rendering 9%
ScriptTotalScriptingParse/CompileParty
https://nymeriarosebooks.com/442ms4ms0ms1st
Unattributable279ms5ms0ms1st
https://nymeriarosebooks.com/assets/index-en2yPdgV.js168ms155ms2ms1st
B
JS Bundles
1 scripts, 105 KB unused
REVIEW
1 scripts, 105 KB unused
Warning::
https://nymeriarosebooks.com/assets/index-en2yPdgV...: 105 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 105 KB
105 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://nymeriarosebooks.com/assets/index-en2yPdgV.js199 KB105 KB (53%)✓1st

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

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
Document Compression
Document response uses gzip; brotli would be ~20% smaller
REVIEW
Document response uses gzip; brotli would be ~20% smaller
Info::
Main HTML response uses gzip (brotli would be ~20% smaller)
All current browsers support brotli. Most CDNs (Cloudflare, Fastly, AWS CloudFront, Vercel, Netlify) can switch from gzip to brotli with a single config flag. Origin servers (nginx, Apache) need a brotli module compiled in -- nginx-brotli or Apache mod_brotli.
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
Page Weight Inventory
Action
22 resources · 4.4 MB · 105 KB savings available
REVIEW
22 resources · 4.4 MB · 105 KB savings available
Warning::
Page weight 4.4 MB exceeds 1 MB target by 3.4 MB
Got: 4.4 MB Expected: ≤ 1 MB
Info::
~105 KB of savings available
Info::
8 resources over 200KB
22 resources · 4.4 MiB · 0 third-party 3.4 MiB over 1MB target
Image 90% · 4.0 MiB
Font 5% · 245.2 KiB
JavaScript 4% · 198.6 KiB
CSS 0% · 16.2 KiB
Document 0% · 999 B

~105.1 KiB of savings available

Remove unused JavaScript: 105.1 KiB
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

B
HTTP Caching
no-cache
REVIEW
no-cache
Info::
Cache-Control header is set
Got: no-cache
Info::
ETag present — enables conditional (304) responses
Cache-Control

no-cache

DirectiveValueMeaning
no-cache—Cache but always revalidate first
A+
Third-Party Impact
No third-party resources
PASS
No third-party resources
Info::
No third-party resources detected
No third-party resources detected — all resources are first-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
Image Optimization
12 images, 0 KB saveable
PASS
12 images, 0 KB saveable
Info::
All images are well-optimized
12 images 4.0 MB
0 oversized -0 KB
3 legacy format
0 missing dimensions CLS risk
A+
Font Loading
5 fonts (245 KB)
PASS
5 fonts (245 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

245 KB total

Render-blocking

0

of 5

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 2.1 s LCP 2.1 shttps://nymeriarosebooks.com/.sfs-fonts/s/playwritegbj/v11/k3kLo8wSPe9dzQ1UGbvobAPhY7KP0QrU8KSa.woff2k3kLo8wSPe9dzQ1UGbvobAP... https://nymeriarosebooks.com/.sfs-fonts/s/playwritegbj/v11/k3kLo8wSPe9dzQ1UGbvobAPhY7KP0QrU8KSa.woff2 — 50.1 KiB — 250 ms — font-display: swaphttps://nymeriarosebooks.com/.sfs-fonts/s/dmsans/v17/rP2Yp2ywxg089UriI5-g4vlH9VoD8Cmcqbu0-K6z9mXg.woff2rP2Yp2ywxg089UriI5-g4vl... https://nymeriarosebooks.com/.sfs-fonts/s/dmsans/v17/rP2Yp2ywxg089UriI5-g4vlH9VoD8Cmcqbu0-K6z9mXg.woff2 — 36.5 KiB — 394 ms — font-display: swaphttps://nymeriarosebooks.com/.sfs-fonts/s/playwriteusmodern/v11/H4c7BWmRlMXPhla3hmMaveiYz8nSDkIFNtw6YbxK.woff2H4c7BWmRlMXPhla3hmMavei... https://nymeriarosebooks.com/.sfs-fonts/s/playwriteusmodern/v11/H4c7BWmRlMXPhla3hmMaveiYz8nSDkIFNtw6YbxK.woff2 — 45.2 KiB — 488 ms — font-display: swaphttps://nymeriarosebooks.com/.sfs-fonts/s/playwriteittrad/v11/SlGKmR6Yo5oYZX5BFVcEySBSPE50BivNh2q2Iw.woff2SlGKmR6Yo5oYZX5BFVcEySB... https://nymeriarosebooks.com/.sfs-fonts/s/playwriteittrad/v11/SlGKmR6Yo5oYZX5BFVcEySBSPE50BivNh2q2Iw.woff2 — 66.4 KiB — 553 ms — font-display: swaphttps://nymeriarosebooks.com/.sfs-fonts/s/playwritegbj/v11/k3kJo8wSPe9dzQ1UGbvobAPhY4KI2w328g.woff2k3kJo8wSPe9dzQ1UGbvobAP... https://nymeriarosebooks.com/.sfs-fonts/s/playwritegbj/v11/k3kJo8wSPe9dzQ1UGbvobAPhY4KI2w328g.woff2 — 47.1 KiB — 678 ms — font-display: swap
k3kLo8wSPe9dzQ1UGbvobAP... woff2 swap
Size 50 KB
Load time 250 ms
Start 1.3 s
Risk FOUT — text flashes from fallback to web font
rP2Yp2ywxg089UriI5-g4vl... woff2 swap
Size 36 KB
Load time 394 ms
Start 1.3 s
Risk FOUT — text flashes from fallback to web font
H4c7BWmRlMXPhla3hmMavei... woff2 swap
Size 45 KB
Load time 488 ms
Start 1.3 s
Risk FOUT — text flashes from fallback to web font
SlGKmR6Yo5oYZX5BFVcEySB... woff2 swap
Size 66 KB
Load time 553 ms
Start 1.3 s
Risk FOUT — text flashes from fallback to web font
k3kJo8wSPe9dzQ1UGbvobAP... woff2 swap
Size 47 KB
Load time 678 ms
Start 1.3 s
Risk FOUT — 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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
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: no-cache
A+
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
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+
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+
JavaScript Blocking
No render-blocking JS or document.write usage detected
PASS
No render-blocking JS or document.write usage detected
Info::
No JavaScript blocking issues 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
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
22 requests over 2385ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 2.1 s LCP 2.1 shttps://nymeriarosebooks.com// https://nymeriarosebooks.com/ — 200 — 999 B — 429 ms — h2https://nymeriarosebooks.com/.sfs/css2?family=Playwrite+US+Modern:ital,wght@0,100;0,400;1,100;1,400&family=Playwrite+GB+J:ital,wght@0,100;0,400;1,100;1,400&family=Playwrite+IT+Trad:ital,wght@0,100;0,400;1,100;1,400&family=Playwrite+AR:ital,wght@0,100;0,400;1,100;1,400&family=Lora:ital,wght@0,400;0,600;0,700;1,400;1,600&family=DM+Sans:wght@400;500;600;700&display=swap/.sfs/css2?family=Playwrite+US+Mode... https://nymeriarosebooks.com/.sfs/css2?family=Playwrite+US+Modern:ital,wght@0,100;0,400;1,100;1,400&family=Playwrite+GB+J:ital,wght@0,100;0,400;1,100;1,400&family=Playwrite+IT+Trad:ital,wght@0,100;0,400;1,100;1,400&family=Playwrite+AR:ital,wght@0,100;0,400;1,100;1,400&family=Lora:ital,wght@0,400;0,600;0,700;1,400;1,600&family=DM+Sans:wght@400;500;600;700&display=swap — 200 — 2.2 KiB — 199 ms — h2https://nymeriarosebooks.com/assets/index-en2yPdgV.js/assets/index-en2yPdgV.js https://nymeriarosebooks.com/assets/index-en2yPdgV.js — 200 — 198.6 KiB — 759 ms — h2https://nymeriarosebooks.com/assets/index-DpmZYwjl.css/assets/index-DpmZYwjl.css https://nymeriarosebooks.com/assets/index-DpmZYwjl.css — 200 — 14.0 KiB — 370 ms — h2https://nymeriarosebooks.com/static/logo-stone-marker.webp/static/logo-stone-marker.webp https://nymeriarosebooks.com/static/logo-stone-marker.webp — 200 — 31.5 KiB — 145 ms — h2https://nymeriarosebooks.com/static/author-nymeria-rose.jpg/static/author-nymeria-rose.jpg https://nymeriarosebooks.com/static/author-nymeria-rose.jpg — 200 — 76.0 KiB — 358 ms — h2https://nymeriarosebooks.com/static/char-walter-whale.webp/static/char-walter-whale.webp https://nymeriarosebooks.com/static/char-walter-whale.webp — 200 — 679.5 KiB — 741 ms — h2https://nymeriarosebooks.com/static/char-emma-age2.webp/static/char-emma-age2.webp https://nymeriarosebooks.com/static/char-emma-age2.webp — 200 — 283.6 KiB — 880 ms — h2https://nymeriarosebooks.com/static/char-oliver-otter.webp/static/char-oliver-otter.webp https://nymeriarosebooks.com/static/char-oliver-otter.webp — 200 — 463.0 KiB — 891 ms — h2https://nymeriarosebooks.com/static/book-stone-whale.webp/static/book-stone-whale.webp https://nymeriarosebooks.com/static/book-stone-whale.webp — 200 — 505.6 KiB — 928 ms — h2https://nymeriarosebooks.com/static/book-tides-stillwater.webp/static/book-tides-stillwater.webp https://nymeriarosebooks.com/static/book-tides-stillwater.webp — 200 — 440.1 KiB — 953 ms — h2https://nymeriarosebooks.com/static/book-bells-night.webp/static/book-bells-night.webp https://nymeriarosebooks.com/static/book-bells-night.webp — 200 — 641.0 KiB — 971 ms — h2https://nymeriarosebooks.com/static/char-riley-raccoon.webp/static/char-riley-raccoon.webp https://nymeriarosebooks.com/static/char-riley-raccoon.webp — 200 — 496.9 KiB — 924 ms — h2https://nymeriarosebooks.com/static/stock_bg-lake-children-bf8427-0.jpg/static/stock_bg-lake-children-bf84... https://nymeriarosebooks.com/static/stock_bg-lake-children-bf8427-0.jpg — 200 — 81.5 KiB — 897 ms — h2https://nymeriarosebooks.com/static/stock_bg-lake-adult-ed199b-0.jpg/static/stock_bg-lake-adult-ed199b-... https://nymeriarosebooks.com/static/stock_bg-lake-adult-ed199b-0.jpg — 200 — 89.5 KiB — 965 ms — h2https://nymeriarosebooks.com/static/lake-stillwater-bg.webp/static/lake-stillwater-bg.webp https://nymeriarosebooks.com/static/lake-stillwater-bg.webp — 200 — 302.7 KiB — 1.1 s — h2https://nymeriarosebooks.com/.sfs-fonts/s/playwritegbj/v11/k3kLo8wSPe9dzQ1UGbvobAPhY7KP0QrU8KSa.woff2/.sfs-fonts/s/playwritegbj/v11/k3kL... https://nymeriarosebooks.com/.sfs-fonts/s/playwritegbj/v11/k3kLo8wSPe9dzQ1UGbvobAPhY7KP0QrU8KSa.woff2 — 200 — 50.1 KiB — 250 ms — h2https://nymeriarosebooks.com/.sfs-fonts/s/dmsans/v17/rP2Yp2ywxg089UriI5-g4vlH9VoD8Cmcqbu0-K6z9mXg.woff2/.sfs-fonts/s/dmsans/v17/rP2Yp2ywxg... https://nymeriarosebooks.com/.sfs-fonts/s/dmsans/v17/rP2Yp2ywxg089UriI5-g4vlH9VoD8Cmcqbu0-K6z9mXg.woff2 — 200 — 36.5 KiB — 394 ms — h2https://nymeriarosebooks.com/.sfs-fonts/s/playwriteusmodern/v11/H4c7BWmRlMXPhla3hmMaveiYz8nSDkIFNtw6YbxK.woff2/.sfs-fonts/s/playwriteusmodern/v11... https://nymeriarosebooks.com/.sfs-fonts/s/playwriteusmodern/v11/H4c7BWmRlMXPhla3hmMaveiYz8nSDkIFNtw6YbxK.woff2 — 200 — 45.2 KiB — 488 ms — h2https://nymeriarosebooks.com/.sfs-fonts/s/playwriteittrad/v11/SlGKmR6Yo5oYZX5BFVcEySBSPE50BivNh2q2Iw.woff2/.sfs-fonts/s/playwriteittrad/v11/S... https://nymeriarosebooks.com/.sfs-fonts/s/playwriteittrad/v11/SlGKmR6Yo5oYZX5BFVcEySBSPE50BivNh2q2Iw.woff2 — 200 — 66.4 KiB — 553 ms — h2https://nymeriarosebooks.com/.sfs-fonts/s/playwritegbj/v11/k3kJo8wSPe9dzQ1UGbvobAPhY4KI2w328g.woff2/.sfs-fonts/s/playwritegbj/v11/k3kJ... https://nymeriarosebooks.com/.sfs-fonts/s/playwritegbj/v11/k3kJo8wSPe9dzQ1UGbvobAPhY4KI2w328g.woff2 — 200 — 47.1 KiB — 678 ms — h2https://nymeriarosebooks.com/favicon.svg/favicon.svg https://nymeriarosebooks.com/favicon.svg — 200 — 543 B — 681 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization
14 images, 6030 KB total, 3572 KB wasted
INFO

Image Optimization Audit

Total Images

14

Total Size

6030 KB

Oversized

9

Wasted

3572 KB

14 missing dimensions 12 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