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Performance

· 22 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
87
GRADE
B
FIX
1
REVIEW
7
PASS
11
INFO
3

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

Mobile Desktop
81
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
88
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.

564 ms

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

744 ms

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

11 ms

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

0.388

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

830 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.

746 ms

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
11 PASS 7 REVIEW 1 FIX
F
Page Weight Budget
Action
18.7 MB transferred, 20 requests
FIX
18.7 MB transferred, 20 requests
Critical::
Page weighs 19.1 MB (18.7 MB transferred)
Warning::
Images are 18.2 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 18.2 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::
20 HTTP requests
Info::
Estimated 3.9 g CO2 per page load
18.7 MB / 2.4 MB budget
18.7 MB transferred
20 requests
3.9 g CO2 per page load
Images 18.2 MiB 97%
Fonts 245.2 KiB 1%
JavaScript 232.3 KiB 1%
CSS 17.2 KiB 0%
HTML 997 B 0%
Other 554 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
749ms total JS execution
REVIEW
749ms total JS execution
Warning::
https://nymeriarosebooks.com/: 415ms CPU time
Warning::
Unattributable: 258ms CPU time
Info::
https://nymeriarosebooks.com/assets/index-BglyoBit...: 75ms CPU time

Main Thread Breakdown

Other 60% Style & Layout 25% Script Evaluation 9% Rendering 5%
ScriptTotalScriptingParse/CompileParty
https://nymeriarosebooks.com/415ms1ms0ms1st
Unattributable258ms2ms0ms1st
https://nymeriarosebooks.com/assets/index-BglyoBit.js75ms65ms1ms1st
B
JS Bundles
1 scripts, 129 KB unused
REVIEW
1 scripts, 129 KB unused
Warning::
https://nymeriarosebooks.com/assets/index-BglyoBit...: 129 KB unused (56%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 129 KB
129 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://nymeriarosebooks.com/assets/index-BglyoBit.js232 KB129 KB (56%)✓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
20 resources · 18.7 MB · 129 KB savings available
REVIEW
20 resources · 18.7 MB · 129 KB savings available
Warning::
Page weight 18.7 MB exceeds 1 MB target by 17.7 MB
Got: 18.7 MB Expected: ≤ 1 MB
Info::
~129 KB of savings available
Info::
8 resources over 200KB
20 resources · 18.7 MiB · 0 third-party 17.7 MiB over 1MB target
Image 97% · 18.2 MiB
Font 1% · 245.2 KiB
JavaScript 1% · 232.3 KiB
CSS 0% · 17.2 KiB
Document 0% · 997 B

~128.6 KiB of savings available

Remove unused JavaScript: 128.6 KiB
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
10 images, 0 KB saveable
PASS
10 images, 0 KB saveable
Info::
All images are well-optimized
10 images 18.2 MB
0 oversized -0 KB
2 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 FCP 564 ms LCP 744 mshttps://nymeriarosebooks.com/.sfs-fonts/s/playwritegbj/v11/k3kLo8wSPe9dzQ1UGbvobAPhY7KP0QrU8KSa.woff2k3kLo8wSPe9dzQ1UGbvobAP... https://nymeriarosebooks.com/.sfs-fonts/s/playwritegbj/v11/k3kLo8wSPe9dzQ1UGbvobAPhY7KP0QrU8KSa.woff2 — 50.1 KiB — 667 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 — 672 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 — 674 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 — 678 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 — 681 ms — font-display: swap
k3kLo8wSPe9dzQ1UGbvobAP... woff2 swap
Size 50 KB
Load time 667 ms
Start 555 ms
Risk FOUT — text flashes from fallback to web font
rP2Yp2ywxg089UriI5-g4vl... woff2 swap
Size 36 KB
Load time 672 ms
Start 555 ms
Risk FOUT — text flashes from fallback to web font
k3kJo8wSPe9dzQ1UGbvobAP... woff2 swap
Size 47 KB
Load time 674 ms
Start 556 ms
Risk FOUT — text flashes from fallback to web font
H4c7BWmRlMXPhla3hmMavei... woff2 swap
Size 45 KB
Load time 678 ms
Start 556 ms
Risk FOUT — text flashes from fallback to web font
SlGKmR6Yo5oYZX5BFVcEySB... woff2 swap
Size 66 KB
Load time 681 ms
Start 558 ms
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+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: IONOS SE

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
20 requests over 1409ms
INFO
0 ms 500 ms 1.0 s FCP 564 ms LCP 744 mshttps://nymeriarosebooks.com// https://nymeriarosebooks.com/ — 200 — 997 B — 138 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 — 187 ms — h2https://nymeriarosebooks.com/assets/index-BglyoBit.js/assets/index-BglyoBit.js https://nymeriarosebooks.com/assets/index-BglyoBit.js — 200 — 232.3 KiB — 187 ms — h2https://nymeriarosebooks.com/assets/index-CrqMB9D6.css/assets/index-CrqMB9D6.css https://nymeriarosebooks.com/assets/index-CrqMB9D6.css — 200 — 15.0 KiB — 56 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 — 53 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 — 50 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 — 142 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 — 89 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 — 158 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 — 166 ms — h2https://nymeriarosebooks.com/static/char-emma-age6.webp/static/char-emma-age6.webp https://nymeriarosebooks.com/static/char-emma-age6.webp — 200 — 335.3 KiB — 178 ms — h2https://nymeriarosebooks.com/static/char-emma-age9.webp/static/char-emma-age9.webp https://nymeriarosebooks.com/static/char-emma-age9.webp — 200 — 8.1 MiB — 879 ms — h2https://nymeriarosebooks.com/static/char-emma-age12.webp/static/char-emma-age12.webp https://nymeriarosebooks.com/static/char-emma-age12.webp — 200 — 7.9 MiB — 953 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 — 550 ms — 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 — 667 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 — 672 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 — 674 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 — 678 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 — 681 ms — h2https://nymeriarosebooks.com/favicon.svg/favicon.svg https://nymeriarosebooks.com/favicon.svg — 200 — 554 B — 746 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization
8 images, 2589 KB total, 1317 KB wasted
INFO

Image Optimization Audit

Total Images

8

Total Size

2589 KB

Oversized

5

Wasted

1317 KB

8 missing dimensions 6 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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