Performance
· 15 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.
1.73 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
3.64 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
9 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.049
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
3.94 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.
4.18 s
Page Load Progression
890 ms
1.8 s 2.7 s 3.6 s
4.5 s
5.3 s 6.2 s
7.1 sFPage Weight BudgetAction7.0 MB transferred, 144 requestsFIX
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
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
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.
Source: web.dev
Subset fonts to include only used characters, or switch to system font stacks.
Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).
Source: web.dev font loading
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 BundlesAction44 scripts, 681 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://s.psecn.photoshelter.com/marketing-2026-04-16/wp-content/themes/photoshelter/dist/assets/js/theme.js?ver=1772126327 | 327 KB | 265 KB (81%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-KVMNJL24QQ&cx=c>m=4e64k0 | 174 KB | 69 KB (39%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-534WKDSX | 162 KB | 63 KB (39%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-1048371370&cx=c>m=4e64k0 | 146 KB | 62 KB (42%) | ✓ | 3rd |
| https://js.qualified.com/qualified.js?token=cUXkaFNnffEVeCQp | 117 KB | 57 KB (49%) | ✓ | 3rd |
| https://www.clickcease.com/monitor/stat.js | 44 KB | 38 KB (90%) | ✓ | 3rd |
| https://script.hotjar.com/modules.6a0f3932cb1341a35c18.js | 57 KB | 38 KB (67%) | ✓ | 3rd |
| https://dev.visualwebsiteoptimizer.com/cdn/web/djIkdGU6Ny4wOmFzeW5jJWdxdWVyeQ==/tag-71b55da48a4a43c893cee9eb8e65122ebr.js | 57 KB | 35 KB (61%) | ✓ | 3rd |
| https://js.qualified.com/packs/js/multimodal_v2-fe90ad83.js | 97 KB | 31 KB (32%) | ✓ | 3rd |
| https://js.qualified.com/packs/js/offers-b8e8b6e8.js | 39 KB | 25 KB (63%) | ✓ | 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 InventoryAction144 resources · 7.0 MB · 681 KB savings availableFIX
~681.3 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 144 resources | 7.0 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction40 images, 0 KB saveableREVIEW
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
Set explicit width and height to prevent CLS.
Performance issues directly impact user engagement and conversion rates.
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
CJS Execution CostAction1249ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.photoshelter.com/ | 360ms | 13ms | 1ms | 3rd |
| https://s.psecn.photoshelter.com/marketing-2026-04-16/wp-content/themes/photoshelter/dist/assets/js/theme.js?ver=1772126327 | 306ms | 59ms | 7ms | 3rd |
| Unattributable | 189ms | 10ms | 0ms | 3rd |
| https://js.qualified.com/qualified.js?token=cUXkaFNnffEVeCQp | 103ms | 91ms | 8ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-534WKDSX | 86ms | 70ms | 11ms | 3rd |
| https://js.qualified.com/packs/js/offers-b8e8b6e8.js | 85ms | 29ms | 4ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-KVMNJL24QQ&cx=c>m=4e64k0 | 69ms | 58ms | 10ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-1048371370&cx=c>m=4e64k0 | 52ms | 44ms | 7ms | 3rd |
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 Loading8 fonts (387 KB)PASS
Web fonts
8
387 KB total
Render-blocking
0
of 8
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
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)
Fixing the unchecked items could save ~52 KB and ~104 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
Network Waterfall144 requests over 6356msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.photoshelter.com www.photoshelter.com | Other | 360ms | 311 KB | — | $5/mo | Costly |
s.psecn.photoshelter.com s.psecn.photoshelter.com | Other | 306ms | 327 KB | 81% | $4/mo | Costly |
Unattributable Unattributable | Other | 189ms | 0 KB | — | $3/mo | Optional |
js.qualified.com js.qualified.com | Other | 103ms | 117 KB | 49% | $1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 86ms | 162 KB | 39% | $1/mo | Optional |
js.qualified.com js.qualified.com | Other | 85ms | 39 KB | 63% | $1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 69ms | 174 KB | 39% | $1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 52ms | 146 KB | 42% | $1/mo | Optional |
These scripts may cost more than they're worth
- www.photoshelter.com adds 360ms and costs ~$5/month
- s.psecn.photoshelter.com adds 306ms and costs ~$4/month
100% 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
www.photoshelter.com takes 360ms 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
s.psecn.photoshelter.com takes 306ms 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
81% of s.psecn.photoshelter.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
63% of js.qualified.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