Performance
· 27 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
2.86 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
20.30 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
552 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.
4.20 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.
20.35 s
Page Load Progression
FPage Weight BudgetAction3.6 MB transferred, 98 requestsFIX
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
Source: web.dev
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.
Source: web.dev
DThird-Party ImpactAction68% third-party, 0 ms blockingFIX
DJS Execution CostAction2307ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://mainstreetestatesales.com/cdn/shop/t/1/assets/lazysizes.js?v=63098554868324070131603833289 | 908ms | 94ms | 2ms | 1st |
| Unattributable | 388ms | 18ms | 0ms | 3rd |
| https://mainstreetestatesales.com/ | 232ms | 105ms | 11ms | 1st |
| https://mainstreetestatesales.com/cdn/wpm/b81a24193wb0bf602apf85b30fcm71c6b379m.js | 221ms | 198ms | 12ms | 1st |
| https://connect.facebook.net/en_US/fbevents.js | 117ms | 89ms | 28ms | 3rd |
| https://mainstreetestatesales.com/cdn/s/trekkie.storefront.82900183b05ff23f8455639d7eb513d638b0a722.min.js | 116ms | 107ms | 7ms | 1st |
| https://mainstreetestatesales.com/cdn/shopifycloud/storefront/assets/shopify_pay/storefront-bf1cdb70.js?v=20250812 | 88ms | 82ms | 6ms | 1st |
| https://mainstreetestatesales.com/cdn/shopifycloud/perf-kit/shopify-perf-kit-3.3.1.min.js | 81ms | 70ms | 4ms | 1st |
| https://code.jquery.com/jquery-3.4.1.min.js | 53ms | 44ms | 7ms | 3rd |
| https://connect.facebook.net/signals/config/3330667760480615?v=2.9.313&r=stable&domain=mainstreetestatesales.com&hme=97937018cefade17726f0472876fc101316b2ce9008a35a6a5a7977d7436151a&ex_m=104%2C205%2C154%2C22%2C72%2C73%2C145%2C68%2C67%2C11%2C162%2C90%2C16%2C138%2C48%2C146%2C77%2C112%2C47%2C127%2C39%2C75%2C78%2C134%2C159%2C164%2C8%2C4%2C5%2C7%2C6%2C3%2C91%2C101%2C165%2C170%2C219%2C62%2C186%2C187%2C55%2C276%2C30%2C74%2C231%2C230%2C229%2C23%2C33%2C103%2C61%2C10%2C63%2C97%2C98%2C99%2C105%2C130%2C31%2C29%2C132%2C133%2C129%2C128%2C155%2C76%2C158%2C156%2C157%2C50%2C60%2C123%2C15%2C161%2C45%2C263%2C264%2C262%2C26%2C27%2C28%2C18%2C20%2C44%2C40%2C42%2C41%2C83%2C92%2C96%2C110%2C144%2C147%2C46%2C111%2C24%2C21%2C119%2C69%2C36%2C149%2C148%2C150%2C141%2C139%2C25%2C35%2C59%2C109%2C160%2C70%2C17%2C152%2C114%2C81%2C66%2C19%2C85%2C86%2C116%2C84%2C136%2C135%2C34%2C278%2C293%2C212%2C201%2C202%2C200%2C296%2C288%2C52%2C213%2C107%2C131%2C80%2C121%2C54%2C49%2C113%2C120%2C126%2C58%2C64%2C151%2C115%2C37%2C32%2C53%2C56%2C100%2C163%2C1%2C124%2C14%2C122%2C12%2C2%2C57%2C93%2C65%2C118%2C89%2C88%2C166%2C167%2C94%2C95%2C9%2C125%2C102%2C51%2C142%2C87%2C79%2C71%2C117%2C106%2C43%2C143%2C0%2C82%2C137%2C140%2C153%2C38%2C108%2C13%2C168 | 52ms | 38ms | 13ms | 3rd |
Showing top 10 of 11 scripts
DPage Weight InventoryAction98 resources · 3.6 MB · 194 KB savings availableFIX
~194.3 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 98 resources | 3.6 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CJS BundlesAction49 scripts, 194 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://mainstreetestatesales.com/cdn/shop/t/1/assets/ndnapps-jslibrary.js?v=171277861806905612121604338468 | 92 KB | 89 KB (97%) | ✓ | 1st |
| https://connect.facebook.net/en_US/fbevents.js | 97 KB | 33 KB (34%) | ✓ | 3rd |
| https://mainstreetestatesales.com/cdn/shop/t/1/assets/theme.js?v=107772646391336992031603833290 | 37 KB | 26 KB (73%) | ✓ | 1st |
| https://mainstreetestatesales.com/cdn/wpm/b81a24193wb0bf602apf85b30fcm71c6b379m.js | 63 KB | 25 KB (41%) | ✓ | 1st |
| https://code.jquery.com/jquery-3.4.1.min.js | 30 KB | 21 KB (70%) | ✓ | 3rd |
| https://mainstreetestatesales.com/cdn/shopifycloud/shop-js/modules/v2/chunk.authorize_oZ0RluMR.esm.js | 1 KB | — | ✓ | 1st |
| https://mainstreetestatesales.com/cdn/shopifycloud/shop-js/modules/v2/chunk.hooks_BPe0V1kQ.esm.js | 17 KB | — | ✓ | 1st |
| https://mainstreetestatesales.com/cdn/shopifycloud/shop-js/modules/v2/chunk.preact-module_Cvpcobqs.esm.js | 5 KB | — | ✓ | 1st |
| https://mainstreetestatesales.com/cdn/shopifycloud/shop-js/modules/v2/chunk.v4_CSBSzmbm.esm.js | 1 KB | — | ✓ | 1st |
| https://mainstreetestatesales.com/cdn/shopifycloud/shop-js/modules/v2/chunk.document_C9LmOiQj.esm.js | 1 KB | — | ✓ | 1st |
Consider code splitting or tree shaking to reduce unused code.
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.
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.
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.
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.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
BResource Hints11 hints, 0 missing preconnectsREVIEW
Current Resource Hints
11 resource hints configured
Fonts are always fetched as crossorigin=anonymous; a preload without the attribute creates a different cache key, so the browser refetches when the actual font request happens. Sample: //mainstreetestatesales.com/cdn/fonts/open_sans/opensans_n3.b10466eda05a6b2d1ef0f6ba490dcecf7588dd78.woff2, //mainstreetestatesales.com/cdn/fonts/open_sans/opensans_n3.b10466eda05a6b2d1ef0f6ba490dcecf7588dd78.woff2, //mainstreetestatesales.com/cdn/fonts/open_sans/opensans_n7.a9393be1574ea8606c68f4441806b2711d0d13e4.woff2. Add `crossorigin` (or `crossorigin="anonymous"`) to each preload.
Performance issues directly impact user engagement and conversion rates.
preconnect already does the DNS lookup; adding dns-prefetch to the same origin is at best a no-op. Sample: https://monorail-edge.shopifysvc.com. Remove the redundant dns-prefetch entries.
Performance issues directly impact user engagement and conversion rates.
The same href shouldn't appear in multiple hint rels -- one wins, the others are wasted markup and may confuse cache behavior. Sample: https://monorail-edge.shopifysvc.com (preconnect+dns-prefetch), //mainstreetestatesales.com/cdn/fonts/open_sans/opensans_n3.b10466eda05a6b2d1ef0f6ba490dcecf7588dd78.woff2 (preload+preload).
Performance issues directly impact user engagement and conversion rates.
CCompression AlgorithmActionMain response served uncompressedREVIEW
BMain HTML Cache-ControlNo Cache-Control header on main HTML responseREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
AImage Optimization17 images, 0 KB saveablePASS
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
A+Font Loading4 fonts (85 KB)PASS
Web fonts
4
85 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
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 CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Server-Timing Observability17 Server-Timing entries advertisedPASS
A+Server Response Intelligence2 server-response signal(s) detectedPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
AJavaScript Blocking1 JS blocking issue(s) detectedPASS
A+CSS Performance DepthNo CSS performance depth issues detectedPASS
Network Waterfall98 requests over 2233msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 388ms | 0 KB | — | €2/mo | Costly |
Facebook Pixel connect.facebook.net | Advertising | 117ms | 97 KB | 34% | €1/mo | Optional |
code.jquery.com code.jquery.com | Other | 53ms | 30 KB | 70% | €0/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 52ms | 46 KB | — | €0/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 388ms and costs ~€2/month
Unattributable takes 388ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
70% of code.jquery.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
Real-User Performance (CrUX)Field metrics from the Chrome User Experience ReportINFO
Chrome User Experience (CrUX)
Real-user metrics from the Chrome UX Report (2026-04-11 — 2026-05-08)
LCP (p75)
1735 ms
87% good
INP (p75)
78 ms
96% good
CLS (p75)
0.000
100% good
FCP (p75)
1074 ms
TTFB (p75)
455 ms
Image Optimization13 images, 2648 KB total, 2304 KB wastedINFO
Image Optimization Audit
Total Images
13
Total Size
2648 KB
Oversized
4
Wasted
2304 KB