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https://silkandwillow.com

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
72
GRADE
C
FIX
5
REVIEW
1
PASS
6
INFO
2

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

Mobile Desktop
86
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
77
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.

728 ms

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

1.18 s

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

138 ms

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

0.000

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

4.08 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.

6.16 s

Page Load Progression

590 ms
1.2 s
1.8 s
2.4 s
2.9 s
3.5 s
4.1 s
4.7 s
Checks
14
6 PASS 1 REVIEW 5 FIX
F
Page Weight Budget
Action
7.2 MB transferred, 241 requests
FIX
7.2 MB transferred, 241 requests
Critical::
Page weighs 11.6 MB (7.2 MB transferred)
Warning::
Images are 2.6 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 2.6 MB
Info::
CSS is 2.0 MB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 2.0 MB
Warning::
JavaScript is 1.4 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.4 MB
Warning::
241 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 1.5 g CO2 per page load
7.2 MB / 2.4 MB budget
7.2 MB transferred
241 requests
1.5 g CO2 per page load
Images 2.6 MiB 36%
CSS 2.0 MiB 28%
JavaScript 1.4 MiB 20%
Other 888.9 KiB 12%
Fonts 158.4 KiB 2%
HTML 78.2 KiB 1%
Other 22.0 KiB 0%
Other 10.1 KiB 0%
Other 9.4 KiB 0%
Other 0 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

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Why this matters

CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.

Source: web.dev

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

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (7.2 MiB of 7.2 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
2285ms total JS execution
FIX
2285ms total JS execution
Warning::
Unattributable: 553ms CPU time
Warning::
https://www.silkandwillow.com/: 458ms CPU time
Warning::
https://cdn.shopify.com/extensions/019d65e0-8476-7...: 351ms CPU time
Warning::
https://cdn.shopify.com/extensions/019d49a1-9f25-7...: 293ms CPU time
Info::
https://www.silkandwillow.com/cdn/s/trekkie.storef...: 163ms CPU time
Warning::
Third-party scripts: 2285ms (100% of total)

Main Thread Breakdown

Script Evaluation 44% Other 30% Style & Layout 14% Script Parsing & Compilation 7%
ScriptTotalScriptingParse/CompileParty
Unattributable553ms91ms0ms3rd
https://www.silkandwillow.com/458ms67ms9ms3rd
https://cdn.shopify.com/extensions/019d65e0-8476-7f65-8c25-affba06862c6/region-restrictions-318/assets/ip-blocker-embed.min.js351ms73ms1ms3rd
https://cdn.shopify.com/extensions/019d49a1-9f25-7d05-a7f4-303cfe84faba/infinite-color-search-by-hoppn-391/assets/ics.js293ms208ms21ms3rd
https://www.silkandwillow.com/cdn/s/trekkie.storefront.e683ac02f599017ff9915d0144977db42ea1653f.min.js163ms151ms3ms3rd
https://www.silkandwillow.com/cdn/wpm/b0e8c7c7aw41bd75a1p837d7fd4m8b145375m.js122ms95ms8ms3rd
https://www.googletagmanager.com/gtag/js?id=G-RDMZVKHJ9D114ms94ms19ms3rd
https://cdn.shopify.com/extensions/019d49a1-9f25-7d05-a7f4-303cfe84faba/infinite-color-search-by-hoppn-391/assets/color-wheel.js63ms13ms50ms3rd
https://loox.io/widget/V1-QKkkDrj/loox.1634594915036.js?shop=silkandwillow.myshopify.com59ms38ms14ms3rd
https://connect.facebook.net/en_US/fbevents.js56ms30ms25ms3rd

Showing top 10 of 11 scripts

F
JS Bundles
Action
125 scripts, 605 KB unused
FIX
125 scripts, 605 KB unused
Warning::
https://cdn.shopify.com/extensions/019d49a1-9f25-7...: 178 KB unused (78%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.jsdelivr.net/npm/hls.js@latest: 145 KB unused (91%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.shopify.com/extensions/019d49a1-9f25-7...: 138 KB unused (50%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-RDMZ...: 65 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://connect.facebook.net/en_US/fbevents.js: 33 KB unused (35%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 605 KB
605 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdn.shopify.com/extensions/019d49a1-9f25-7d05-a7f4-303cfe84faba/infinite-color-search-by-hoppn-391/assets/color-wheel.js229 KB178 KB (78%)✓3rd
https://cdn.jsdelivr.net/npm/hls.js@latest159 KB145 KB (91%)✓3rd
https://cdn.shopify.com/extensions/019d49a1-9f25-7d05-a7f4-303cfe84faba/infinite-color-search-by-hoppn-391/assets/ics.js275 KB138 KB (50%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-RDMZVKHJ9D161 KB65 KB (40%)✓3rd
https://connect.facebook.net/en_US/fbevents.js95 KB33 KB (35%)✓3rd
https://www.silkandwillow.com/cdn/wpm/b0e8c7c7aw41bd75a1p837d7fd4m8b145375m.js61 KB23 KB (39%)✓3rd
https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js33 KB22 KB (68%)✓3rd
https://static.klaviyo.com/onsite/js/build-preview/commit-98747c9b1816a2f78e748cdc073a286a0296d9f7/vendors~in_app_forms~signup_forms~client_identity~telemetry~onsite-triggering-v2~onsite-triggering~.00140035a0ee1bdef5e1.js?cb=23 KB—✓3rd
https://www.silkandwillow.com/cdn/shopifycloud/shop-js/modules/v2/chunk.v4_CSBSzmbm.esm.js1 KB—✓3rd
https://static.klaviyo.com/onsite/js/KbRfTA/klaviyo.js?company_id=KbRfTA3 KB—✓3rd

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

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

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

D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0

DirectiveValueMeaning
private—Only browser cache, not CDN/proxy
max-age0Cache for 0 seconds
no-store—Never cache this response
no-cache—Cache but always revalidate first
must-revalidate—Must recheck with server after expiry
post-check0
pre-check0
B
Image Optimization
37 images, 0 KB saveable
REVIEW
37 images, 0 KB saveable
Info::
All images are well-optimized
37 images 2.6 MB
0 oversized -0 KB
7 legacy format
0 missing dimensions CLS risk
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
6 fonts (158 KB)
PASS
6 fonts (158 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

6

158 KB total

Render-blocking

0

of 6

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 728 ms LCP 1.2 shttps://www.silkandwillow.com/cdn/fonts/anonymous_pro/anonymouspro_n4.f8892cc1cfa3d797af6172c8eeddce62cf610e33.woff2anonymouspro_n4.f8892cc... https://www.silkandwillow.com/cdn/fonts/anonymous_pro/anonymouspro_n4.f8892cc1cfa3d797af6172c8eeddce62cf610e33.woff2 — 22.5 KiB — 0 ms — font-display: swaphttps://www.silkandwillow.com/cdn/fonts/cormorant/cormorant_n4.bd66e8e0031690b46374315bd1c15a17a8dcd450.woff2cormorant_n4.bd66e8e003... https://www.silkandwillow.com/cdn/fonts/cormorant/cormorant_n4.bd66e8e0031690b46374315bd1c15a17a8dcd450.woff2 — 23.4 KiB — 0 ms — font-display: swaphttps://www.silkandwillow.com/cdn/fonts/anonymous_pro/anonymouspro_i4.e25745b6d033a0b4eea75ad1dd0df2b911abcf1f.woff2anonymouspro_i4.e25745b... https://www.silkandwillow.com/cdn/fonts/anonymous_pro/anonymouspro_i4.e25745b6d033a0b4eea75ad1dd0df2b911abcf1f.woff2 — 20.0 KiB — 0 ms — font-display: swaphttps://www.silkandwillow.com/cdn/fonts/anonymous_pro/anonymouspro_n7.1abf60a1262a5f61d3e7f19599b5bc79deae580f.woff2anonymouspro_n7.1abf60a... https://www.silkandwillow.com/cdn/fonts/anonymous_pro/anonymouspro_n7.1abf60a1262a5f61d3e7f19599b5bc79deae580f.woff2 — 21.5 KiB — 0 ms — font-display: swaphttps://cdn.shopify.com/shop-assets/static_uploads/shoplift/GTStandard-MRegular.woff2GTStandard-MRegular.woff2 https://cdn.shopify.com/shop-assets/static_uploads/shoplift/GTStandard-MRegular.woff2 — 63.2 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/poppins/v24/pxiEyp8kv8JHgFVrJJfecnFHGPc.woff2pxiEyp8kv8JHgFVrJJfecnF... https://fonts.gstatic.com/s/poppins/v24/pxiEyp8kv8JHgFVrJJfecnFHGPc.woff2 — 7.7 KiB — 0 ms — font-display: swap
anonymouspro_n4.f8892cc... woff2 swap
Size 23 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
cormorant_n4.bd66e8e003... woff2 swap
Size 23 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
anonymouspro_i4.e25745b... woff2 swap
Size 20 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
anonymouspro_n7.1abf60a... woff2 swap
Size 22 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
GTStandard-MRegular.woff2 woff2 swap
Size 63 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
pxiEyp8kv8JHgFVrJJfecnF... woff2 swap
Size 8 KB
Load time 0 ms
Start 0 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+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall
241 requests over 0ms
INFO

Performance analysis not available for this result.

Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 2285ms · 950KB · €25/mo
Unattributable
Other
Costly
Execution 553ms
Transfer 0 KB
Monthly Cost €6/mo
www.silkandwillow.com
Other
Costly
Execution 458ms
Transfer 44 KB
Monthly Cost €5/mo
cdn.shopify.com
Other
Costly
Execution 351ms
Transfer 0 KB
Monthly Cost €4/mo
cdn.shopify.com
Other
Costly
Execution 293ms
Transfer 275 KB
Unused 50%
Monthly Cost €3/mo
www.silkandwillow.com
Other
Optional
Execution 163ms
Transfer 28 KB
Monthly Cost €2/mo
www.silkandwillow.com
Other
Optional
Execution 122ms
Transfer 61 KB
Unused 39%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 114ms
Transfer 161 KB
Unused 40%
Monthly Cost €1/mo
cdn.shopify.com
Other
Optional
Execution 63ms
Transfer 229 KB
Unused 78%
Monthly Cost €1/mo
loox.io
Other
Optional
Execution 59ms
Transfer 34 KB
Monthly Cost €1/mo
Facebook Pixel
Advertising
Optional
Execution 56ms
Transfer 95 KB
Unused 35%
Monthly Cost €1/mo
static.klaviyo.com
Other
Optional
Execution 52ms
Transfer 23 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • Unattributable adds 553ms and costs ~€6/month
  • www.silkandwillow.com adds 458ms and costs ~€5/month
  • cdn.shopify.com adds 351ms and costs ~€4/month
  • cdn.shopify.com adds 293ms and costs ~€3/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

Unattributable takes 553ms 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

www.silkandwillow.com takes 458ms 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

cdn.shopify.com takes 351ms 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

cdn.shopify.com takes 293ms 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

50% of cdn.shopify.com'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

78% of cdn.shopify.com'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

How third-party costs are calculated

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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