Performance
· 22 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.
1.43 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.12 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
16 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.040
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.12 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.
2.14 s
Page Load Progression
FPage Weight BudgetAction10.7 MB transferred, 142 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
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS BundlesAction72 scripts, 515 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=AW-16635365641&cx=c>m=4e66h0 | 169 KB | 118 KB (70%) | ✓ | 3rd |
| https://code.tidio.co/widget-v4/1_443_0/static/js/widget.edc0a31594b488c30f84.js | 215 KB | 102 KB (47%) | ✓ | 3rd |
| https://code.tidio.co/widget-v4/1_443_0/static/js/chunk-WidgetIframe-edc0a31594b488c30f84.js | 147 KB | 75 KB (51%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-55XZCX53 | 127 KB | 65 KB (51%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-16635365641 | 169 KB | 62 KB (37%) | ✓ | 3rd |
| https://cdn.ryviu.com/v/static/js/app.js?shop=oneou.com&t=1781939628&ver=3.1.25 | 54 KB | 39 KB (73%) | ✓ | 3rd |
| https://oneou.com/wp-includes/js/dist/vendor/react-dom.min.js?ver=18.2.0 | 39 KB | 34 KB (87%) | ✓ | 3rd |
| https://oneou.com/wp-content/plugins/ultimate-addons-for-gutenberg/assets/js/swiper-bundle.min.js?ver=2.13.4 | 37 KB | 21 KB (58%) | ✓ | 3rd |
| https://oneou.com/wp-includes/js/dist/deprecated.min.js?ver=e1f84915c5e8ae38964c | 1 KB | — | ✓ | 3rd |
| https://oneou.com/wp-includes/js/dist/is-shallow-equal.min.js?ver=e0f9f1d78d83f5196979 | 1 KB | — | ✓ | 3rd |
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
FPage Weight InventoryAction142 resources · 10.7 MB · 515 KB savings availableFIX
~515.1 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 142 resources | 10.7 MiB | ||||||
BImage Optimization26 images, 0 KB saveableREVIEW
BJS Execution Cost977ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://oneou.com/ | 355ms | 14ms | 4ms | 3rd |
| Unattributable | 201ms | 7ms | 0ms | 1st |
| https://code.tidio.co/widget-v4/1_443_0/static/js/widget.edc0a31594b488c30f84.js | 134ms | 93ms | 13ms | 3rd |
| https://oneou.com/wp-content/plugins/mailchimp-for-woocommerce/public/js/mailchimp-woocommerce-public.min.js?ver=4.1.07 | 108ms | 41ms | 55ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-16635365641 | 99ms | 85ms | 13ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-55XZCX53 | 81ms | 49ms | 31ms | 3rd |
CCompression AlgorithmActionMain response served uncompressedREVIEW
BMain HTML Cache-ControlMain HTML max-age=3600 (~60min)REVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading7 fonts (131 KB)PASS
Web fonts
7
131 KB total
Render-blocking
0
of 7
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
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+Resource HintsNo optimization neededPASS
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Server Response Intelligence1 server-response signal(s) detectedPASS
AHTTP Cachingmax-age=3600 (1 hour)PASS
max-age=3600
| Directive | Value | Meaning |
|---|---|---|
| max-age | 3600 | Cache for 1 hour |
Network Waterfall142 requests over 4928msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
oneou.com oneou.com | Other | 355ms | 79 KB | — | $2/mo | Costly |
code.tidio.co code.tidio.co | Other | 134ms | 215 KB | 47% | $1/mo | Optional |
oneou.com oneou.com | Other | 108ms | 2 KB | — | $1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 99ms | 169 KB | 37% | $1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 81ms | 127 KB | 51% | $0/mo | Optional |
These scripts may cost more than they're worth
- oneou.com adds 355ms and costs ~$2/month
79% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
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
oneou.com takes 355ms 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
51% of Google Tag Manager'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
Image Optimization29 images, 214 KB total, 0 KB wastedINFO
Image Optimization Audit
Total Images
29
Total Size
214 KB