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.
977 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.36 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
25 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.113
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.33 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.
3.33 s
Page Load Progression
1.1 s
2.2 s
3.4 s 4.5 s
5.6 s 6.7 s
7.8 s
8.9 sFPage Weight BudgetAction5.6 MB transferred, 221 requestsFIX
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 Execution CostAction4048ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://combo.staticflickr.com/66a031f9fc343c5e42d965ca/js/the-revenge-of-flickr-2345678e483294783.schunk.40521d2b29ec749b.js | 2388ms | 1137ms | 8ms | 3rd |
| https://flickr.com/ | 913ms | 25ms | 1ms | 1st |
| Unattributable | 371ms | 2ms | 0ms | 3rd |
| https://cdn.weglot.com/weglot.min.js | 107ms | 58ms | 6ms | 3rd |
| https://consent.trustarc.com/asset/tcfapi2.2.js | 101ms | 87ms | 10ms | 3rd |
| https://consent.trustarc.com/asset/notice.js/v/v1.7-1729 | 60ms | 50ms | 4ms | 3rd |
| https://combo.staticflickr.com/66a031f9fc343c5e42d965ca/js/the-revenge-of-flickr-2345678e483294783.c885b831.429867dd59d5e22a.js | 57ms | 52ms | 0ms | 3rd |
| https://challenges.cloudflare.com/turnstile/v0/api.js | 51ms | 47ms | 2ms | 3rd |
DPage Weight InventoryAction221 resources · 5.6 MB · 132 KB savings availableFIX
~131.7 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 221 resources | 5.6 MiB | ||||||
DHTTP CachingActionno-store (uncacheable)FIX
no-cache, max-age=0, must-revalidate, no-store
| Directive | Value | Meaning |
|---|---|---|
| no-cache | — | Cache but always revalidate first |
| max-age | 0 | Cache for 0 seconds |
| must-revalidate | — | Must recheck with server after expiry |
| no-store | — | Never cache this response |
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.
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.
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.
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
BJS Bundles51 scripts, 132 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://cdn.weglot.com/weglot.min.js | 71 KB | 40 KB (57%) | ✓ | 3rd |
| https://combo.staticflickr.com/ap/soe/index.1.10.2.js | 51 KB | 36 KB (71%) | ✓ | 3rd |
| https://consent.trustarc.com/asset/tcfapi2.2.js | 82 KB | 36 KB (44%) | ✓ | 3rd |
| https://consent.trustarc.com/asset/notice.js/v/v1.7-1729 | 36 KB | 20 KB (57%) | ✓ | 3rd |
| blob:https://challenges.cloudflare.com/d4e2e69f-c283-4a54-a2e8-534b8381b75d | -0 KB | — | ✓ | 3rd |
| blob:https://challenges.cloudflare.com/af2227b3-ab3e-45f6-9073-4951b46563c3 | 0 KB | — | ✓ | 3rd |
| https://combo.staticflickr.com/66a031f9fc343c5e42d965ca/js/the-revenge-of-flickr-2345678e483294783.schunk.40521d2b29ec749b.js | 50 KB | — | ✓ | 3rd |
| https://cdn.weglot.com/switchers/skewed.bfad08b4e04c081647c59d0b2d179b7cb53a4245.min.js | 30 KB | — | ✓ | 3rd |
| https://consent.trustarc.com/notice?domain=flickr.com&c=teconsent&js=nj¬iceType=bb>m=1&dl=TADataLayer | 12 KB | — | ✓ | 3rd |
| https://consent.trustarc.com/iabasset/iabTcfStubV22.js?domain=flickr.com | 2 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
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 Loading67 fonts (24 KB)PASS
Web fonts
67
24 KB total
Render-blocking
0
of 67
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)
Fixing the unchecked items could save ~7 KB and ~14 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
Network Waterfall221 requests over 44748msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
combo.staticflickr.com combo.staticflickr.com | Other | 2388ms | 50 KB | — | €26/mo | Costly |
Unattributable Unattributable | Other | 371ms | 0 KB | — | €4/mo | Costly |
cdn.weglot.com cdn.weglot.com | Other | 107ms | 71 KB | 57% | €1/mo | Optional |
consent.trustarc.com consent.trustarc.com | Other | 101ms | 82 KB | 44% | €1/mo | Optional |
consent.trustarc.com consent.trustarc.com | Other | 60ms | 36 KB | 57% | €1/mo | Optional |
combo.staticflickr.com combo.staticflickr.com | Other | 57ms | 2 KB | — | €1/mo | Optional |
challenges.cloudflare.com challenges.cloudflare.com | Other | 51ms | 0 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- combo.staticflickr.com adds 2388ms and costs ~€26/month
- Unattributable adds 371ms and costs ~€4/month
77% 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
combo.staticflickr.com takes 2388ms 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
Unattributable takes 371ms 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
57% of cdn.weglot.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
57% of consent.trustarc.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