https://voglastore.com
Performance
· 28 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
86
GRADE
B
FIX
3
REVIEW
4
PASS
17
INFO
4
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
59
88
96
92
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
4.45 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
11.88 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
120 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.
7.13 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.
12.03 s
Page Load Progression
Checks
2817 PASS 4 REVIEW 3 FIX
FPage Weight BudgetAction3.3 MB transferred, 421 requestsFIX
Page Weight Budget
Action3.3 MB transferred, 421 requests
3.3 MB transferred, 421 requests
Warning::
Page weighs 4.5 MB (3.3 MB transferred)
Warning::
Images are 1.2 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.2 MB
Warning::
JavaScript is 652 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 652 KB
Warning::
421 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.69 g CO2 per page load
3.3 MB transferred
421 requests
0.69 g CO2 per page load
Images 1.2 MiB 36%
Other 1.1 MiB 34%
JavaScript 652.3 KiB 19%
Fonts 171.0 KiB 5%
HTML 116.4 KiB 3%
CSS 49.5 KiB 1%
Other 10.8 KiB 0%
Other 6.6 KiB 0%
Other 0 B 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
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
FJS Execution CostAction4691ms total JS executionFIX
JS Execution Cost
Action4691ms total JS execution
4691ms total JS execution
Warning::
https://voglastore.com/: 1918ms CPU time
Warning::
Unattributable: 1375ms CPU time
Warning::
https://voglastore.com/cdn/wpm/b264bf420w2e1681cap...: 532ms CPU time
Info::
https://voglastore.com/cdn/shopifycloud/perf-kit/s...: 224ms CPU time
Info::
https://cdn.shopify.com/shopifycloud/shop-js/modul...: 169ms CPU time
Info::
Third-party scripts: 528ms (11% of total)
Main Thread Breakdown
Other 34% Script Evaluation 30% Style & Layout 26% Parse HTML & CSS 4%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://voglastore.com/ | 1918ms | 134ms | 31ms | 1st |
| Unattributable | 1375ms | 30ms | 0ms | 1st |
| https://voglastore.com/cdn/wpm/b264bf420w2e1681cap8d55857fm7d879f9cm.js | 532ms | 247ms | 21ms | 1st |
| https://voglastore.com/cdn/shopifycloud/perf-kit/shopify-perf-kit-3.11.0.min.js | 224ms | 98ms | 6ms | 1st |
| https://cdn.shopify.com/shopifycloud/shop-js/modules/v2/chunk.register_C2Sc-DlE.esm.js | 169ms | 137ms | 0ms | 3rd |
| https://voglastore.com/cdn/s/trekkie.storefront.387430da5919a2f9b410f0ffaf5b70216a61abfb.min.js | 115ms | 103ms | 9ms | 1st |
| https://cdn.shopify.com/storefront/web-components/chat.js | 113ms | 29ms | 0ms | 3rd |
| https://static.klaviyo.com/onsite/js/5663.c10b1970f298b.js?cb=2 | 100ms | 87ms | 2ms | 3rd |
| https://cdn.shopify.com/storefront/web-components/chat/agent-runtime-DqFtYUdX.js | 95ms | 57ms | 1ms | 3rd |
| https://code.jquery.com/jquery-3.7.1.min.js | 51ms | 33ms | 7ms | 3rd |
FHTTP CachingActionNo cache headersFIX
HTTP Caching
ActionNo cache headers
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.
Info::
ETag present — enables conditional (304) responses
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BJS Bundles265 scripts, 68 KB unusedREVIEW
JS Bundles
265 scripts, 68 KB unused
265 scripts, 68 KB unused
Warning::
https://voglastore.com/cdn/wpm/b264bf420w2e1681cap...: 46 KB unused (55%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.shopify.com/storefront/web-components/...: 22 KB unused (52%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 68 KB
68 KB unused JavaScript
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://voglastore.com/cdn/wpm/b264bf420w2e1681cap8d55857fm7d879f9cm.js | 85 KB | 46 KB (55%) | ✓ | 1st |
| https://cdn.shopify.com/storefront/web-components/chat/agent-runtime-DqFtYUdX.js | 43 KB | 22 KB (52%) | ✓ | 3rd |
| https://voglastore.com/cdn/shop/t/5/assets/constants.js?v=132983761750457495441757085207 | 1 KB | — | ✓ | 1st |
| https://voglastore.com/cdn/shop/t/5/assets/pubsub.js?v=25310214064522200911757085208 | 1 KB | — | ✓ | 1st |
| https://voglastore.com/cdn/shop/t/5/assets/global.js?v=7301445359237545521757085207 | 9 KB | — | ✓ | 1st |
| https://voglastore.com/cdn/shop/t/5/assets/details-disclosure.js?v=13653116266235556501757085207 | 1 KB | — | ✓ | 1st |
| https://voglastore.com/cdn/shop/t/5/assets/details-modal.js?v=25581673532751508451757085207 | 1 KB | — | ✓ | 1st |
| https://voglastore.com/cdn/shop/t/5/assets/search-form.js?v=133129549252120666541757085208 | 1 KB | — | ✓ | 1st |
| https://voglastore.com/cdn/shop/t/5/assets/animations.js?v=88693664871331136111757085207 | 2 KB | — | ✓ | 1st |
| https://voglastore.com/checkouts/internal/preloads.js?locale=en-FR | 4 KB | — | ✓ | 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
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
BMain HTML Cache-ControlNo Cache-Control header on main HTML responseREVIEW
Main HTML Cache-Control
No Cache-Control header on main HTML response
No Cache-Control header on main HTML response
Info::
Main HTML response has no Cache-Control header
Without an explicit Cache-Control, browsers fall back to heuristic caching (~10% of Last-Modified age). Set `Cache-Control: no-cache` or `max-age=300` for HTML to control freshness explicitly -- prevents stale auth state and SPA shell drift.
CPage Weight InventoryAction421 resources · 3.3 MB · 68 KB savings availableREVIEW
Page Weight Inventory
Action421 resources · 3.3 MB · 68 KB savings available
421 resources · 3.3 MB · 68 KB savings available
Warning::
Page weight 3.3 MB exceeds 1 MB target by 2.3 MB
Got: 3.3 MB Expected: ≤ 1 MB
Info::
~68 KB of savings available
Info::
138 third-party resources (22% of weight)
421 resources · 3.3 MiB · 138 third-party 2.3 MiB over 1MB target
JavaScript 47% · 1.5 MiB
Image 40% · 1.3 MiB
Font 5% · 171.0 KiB
CSS 4% · 126.2 KiB
Document 4% · 123.2 KiB
Other 1% · 17.4 KiB
~68.1 KiB of savings available
Remove unused JavaScript: 68.1 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 421 resources | 3.3 MiB | ||||||
BCSS Performance Depth2 CSS depth issue(s) detectedREVIEW
CSS Performance Depth
2 CSS depth issue(s) detected
2 CSS depth issue(s) detected
Warning::
53 render-blocking stylesheet(s) -- recommended: <=3
Each `<link rel="stylesheet">` without a non-blocking `media` attribute holds up the first paint. Browsers download all of them before painting any content. Consolidate into 1-2 critical-path stylesheets; defer non-critical CSS via `<link rel="stylesheet" media="print" onload="this.media='all'">` or via the loadCSS pattern; inline above-the-fold CSS in `<style>` to short-circuit the request entirely.
Warning::
1 `@font-face` rule(s) without `font-display` -- causes FOIT
An `@font-face` rule without `font-display` causes Flash of Invisible Text (FOIT): the browser hides the styled text for up to 3 seconds while the custom font downloads, then either swaps to fallback (Chrome / Firefox) or stays invisible (older Safari). Add `font-display: swap` (shows fallback immediately, swaps in the custom font when ready) or `font-display: optional` (uses fallback if the font isn't ready in 100ms; never causes visible swap). Either eliminates FOIT outright.
AThird-Party Impact22% third-party, 0 ms blockingPASS
Third-Party Impact
22% third-party, 0 ms blocking
22% third-party, 0 ms blocking
Info::
Third-party code accounts for 22% of page weight (723.4 KiB of 3.3 MiB)
Info::
Third-party blocking time is low (0 ms)
78%
22%
First-party Third-party
A+Text CompressionAll text resources are compressedPASS
Text Compression
All text resources are compressed
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
AImage Optimization34 images, 0 KB saveablePASS
Image Optimization
34 images, 0 KB saveable
34 images, 0 KB saveable
Warning::
https://cdn.shopify.com/s/files/1/0556/1384/9807/f... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
34 images 1.2 MB
0 oversized -0 KB
1 legacy format
1 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
A+Font Loading5 fonts (171 KB)PASS
Font Loading
5 fonts (171 KB)
5 fonts (171 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
5
171 KB total
Render-blocking
0
of 5
Dominant font-display
swap
Most common across fonts
Font loading timeline
Transfer FOIT (block) FOUT (swap)
comfortaa_n4.a743a7214d... woff2 swap
Size 16 KB
Load time 36 ms
Start 388 ms
Risk FOUT — text flashes from fallback to web font
radiocanadabig_n4.179cf... woff2 swap
Size 12 KB
Load time 36 ms
Start 388 ms
Risk FOUT — text flashes from fallback to web font
GTStandard-MSemibold.woff2 woff2 swap
Size 64 KB
Load time 46 ms
Start 1.4 s
Risk FOUT — text flashes from fallback to web font
comfortaa_n7.905e6b0b2f... woff2 swap
Size 16 KB
Load time 31 ms
Start 1.4 s
Risk FOUT — text flashes from fallback to web font
GTStandard-MRegular.woff2 woff2 swap
Size 63 KB
Load time 45 ms
Start 1.4 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 CachingAll resources properly cachedPASS
Resource Caching
All resources properly cached
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+Critical Rendering PathNo render-blocking resourcesPASS
Critical Rendering Path
No render-blocking resources
No render-blocking resources
Info::
No render-blocking resources detected
A+Resource Hints182 hints, 0 missing preconnectsPASS
Resource Hints
182 hints, 0 missing preconnects
182 hints, 0 missing preconnects
Info::
Page uses 182 resource hint(s)
Current Resource Hints
preconnect 2
preload 2
dns-prefetch 4
prefetch
+164
174182 resource hints configured
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
HTTP/3 advertised via Alt-Svc
Info::
HTTP/3 (QUIC) is supported
First-load mobile users on cellular networks see meaningful latency improvements with HTTP/3. The QUIC transport collapses TLS + TCP handshakes into one and recovers faster from packet loss.
A+Document CompressionDocument response uses brotliPASS
Document Compression
Document response uses brotli
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+Asset CompressionAll 3 asset hosts use brotliPASS
Asset Compression
All 3 asset hosts use brotli
All 3 asset hosts use brotli
Info::
cdn.shopify.com serves assets with brotli (assets: 9)
Got: cdn.shopify.com (text/javascript)
Info::
static-tracking.klaviyo.com serves assets with brotli (assets: 3)
Got: static-tracking.klaviyo.com (text/javascript)
Info::
static.klaviyo.com serves assets with brotli (assets: 3)
Got: static.klaviyo.com (application/javascript)
A+LCP Image PreloadLCP preload audit not availablePASS
LCP Image Preload
LCP preload audit not available
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+Server-Timing Observability18 Server-Timing entries advertisedPASS
Server-Timing Observability
18 Server-Timing entries advertised
18 Server-Timing entries advertised
Info::
Server-Timing header advertises 18 timing entries
A+Server Response Intelligence2 server-response signal(s) detectedPASS
Server Response Intelligence
2 server-response signal(s) detected
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 ResourcesNo render-blocking resources detectedPASS
Render-Blocking Resources
No render-blocking resources detected
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+Third-Party ResourcesNo third-party resources detectedPASS
Third-Party Resources
No third-party resources detected
No third-party resources detected
AJavaScript Blocking1 JS blocking issue(s) detectedPASS
JavaScript Blocking
1 JS blocking issue(s) detected
1 JS blocking issue(s) detected
Warning::
Total JS execution time is 4.7 s -- over the 3.5s budget
Total JavaScript execution (parse + compile + run) across all scripts exceeds 3.5 seconds. On low-end devices that becomes 7-15+ seconds and shows up directly in TBT and INP. Reduce by: tree-shaking unused dependencies, code-splitting (dynamic `import()`), removing or deferring third-party tracking, and replacing heavy frameworks where they're not needed.
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
Whether the site is served from green-energy infrastructure
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall421 requests over 35985msINFO
Network Waterfall
421 requests over 35985ms
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
11% of JavaScript execution is third-party
First-party Third-party 528ms · 119KB · €3/mo
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
cdn.shopify.com cdn.shopify.com | Other | 169ms | 15 KB | — | €1/mo | Optional |
cdn.shopify.com cdn.shopify.com | Other | 113ms | 23 KB | — | €1/mo | Optional |
static.klaviyo.com static.klaviyo.com | Other | 100ms | 8 KB | — | €1/mo | Optional |
cdn.shopify.com cdn.shopify.com | Other | 95ms | 43 KB | 52% | €0/mo | Optional |
code.jquery.com code.jquery.com | Other | 51ms | 30 KB | — | €0/mo | Optional |
cdn.shopify.com
Other
Execution 169ms
Transfer 15 KB
Monthly Cost €1/mo
cdn.shopify.com
Other
Execution 113ms
Transfer 23 KB
Monthly Cost €1/mo
static.klaviyo.com
Other
Execution 100ms
Transfer 8 KB
Monthly Cost €1/mo
cdn.shopify.com
Other
Execution 95ms
Transfer 43 KB
Unused 52%
Monthly Cost €0/mo
code.jquery.com
Other
Execution 51ms
Transfer 30 KB
Monthly Cost €0/mo
52% 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
Real-User Performance (CrUX)Field metrics from the Chrome User Experience ReportINFO
Real-User Performance (CrUX)
Field metrics from the Chrome User Experience Report
Chrome User Experience (CrUX)
Real-user metrics from the Chrome UX Report (2026-09-29 — 2026-10-26)
LCP (p75)
1082 ms
95% good
INP (p75)
0 ms
0% good
CLS (p75)
0.000
99% good
FCP (p75)
767 ms
TTFB (p75)
447 ms
Image Optimization54 images, 512 KB total, 18 KB wastedINFO
Image Optimization
54 images, 512 KB total, 18 KB wasted
Image Optimization Audit
Total Images
54
Total Size
512 KB
Oversized
1
Wasted
18 KB
1 missing alt text 1 missing dimensions 10 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.