Skip to content
https://pearltrees.com

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
93
GRADE
A
FIX
2
REVIEW
1
PASS
12
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
79
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
50
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
81
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
83
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

3.36 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

4.21 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

0 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.

3.36 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.

4.21 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
17
12 PASS 1 REVIEW 2 FIX
D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (194.2 KiB of 194.6 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

no-store, no-cache, must-revalidate, post-check=0, pre-check=0

DirectiveValueMeaning
no-store—Never cache this response
no-cache—Cache but always revalidate first
must-revalidate—Must recheck with server after expiry
post-check0
pre-check0
B
Image Optimization
5 images, 0 KB saveable
REVIEW
5 images, 0 KB saveable
Info::
All images are well-optimized
5 images 112 KB
0 oversized -0 KB
5 legacy format
0 missing dimensions CLS risk
A+
Page Weight Budget
195 KB transferred, 18 requests
PASS
195 KB transferred, 18 requests
Info::
Page weighs 397 KB (195 KB transferred)
Info::
18 HTTP requests
Info::
Estimated 0.04 g CO2 per page load
195 KB / 2.4 MB budget
195 KB transferred
18 requests
0.04 g CO2 per page load
Images 112.3 KiB 58%
JavaScript 50.9 KiB 26%
CSS 21.8 KiB 11%
Other 6.1 KiB 3%
HTML 3.1 KiB 2%
Other 415 B 0%
0 2.4 MB 4.9 MB
Under budget
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
JS Execution Cost
398ms total JS execution
PASS
398ms total JS execution
Info::
https://ajax.googleapis.com/ajax/libs/jquery/1.10....: 225ms CPU time
Info::
Unattributable: 103ms CPU time
Info::
https://www.pearltrees.com/: 70ms CPU time
Warning::
Third-party scripts: 398ms (100% of total)

Main Thread Breakdown

Script Evaluation 43% Other 37% Style & Layout 11% Script Parsing & Compilation 4% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js225ms155ms8ms3rd
Unattributable103ms5ms0ms3rd
https://www.pearltrees.com/70ms4ms3ms3rd
A+
Font Loading
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
A+
JS Bundles
5 scripts, 0 KB unused
PASS
5 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js33 KB—✓3rd
https://cdn.pearltrees.com/v2static/js/homeremote/homemobile.js?20260420-19h14-104642 KB—✓3rd
https://cdnjs.cloudflare.com/ajax/libs/iScroll/5.1.1/iscroll-min.js8 KB—✓3rd
https://cdn.pearltrees.com/v2static/js/homeremote/carousel.js?20260420-19h14-104648 KB—✓3rd
https://cdnjs.cloudflare.com/ajax/libs/jquery.waitforimages/1.5.0/jquery.waitforimages.min.js1 KB—✓3rd
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A
Page Weight Inventory
18 resources · 195 KB · 0 KB savings available
PASS
18 resources · 195 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 195 KB
Warning::
17 third-party resources (100% of weight)
18 resources · 194.6 KiB · 17 third-party Within 1MB page-weight target
Image 61% · 118.1 KiB
JavaScript 26% · 50.9 KiB
CSS 11% · 21.8 KiB
Document 2% · 3.1 KiB
Other 0% · 808 B
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: OVHcloud

Network Waterfall
18 requests over 408ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 3.4 s LCP 4.2 shttps://pearltrees.com// https://pearltrees.com/ — 301 — 393 B — 78 ms — http/1.1http://www.pearltrees.com/www.pearltrees.com/ http://www.pearltrees.com/ — 307 — 0 B — 2 ms — http/1.1https://www.pearltrees.com/www.pearltrees.com/ https://www.pearltrees.com/ — 200 — 3.1 KiB — 75 ms — http/1.1https://fonts.googleapis.com/css?family=Open+Sans:400,300&subset=latinfonts.googleapis.com/css?family=Ope... https://fonts.googleapis.com/css?family=Open+Sans:400,300&subset=latin — 200 — 2.1 KiB — 98 ms — h2https://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.jsajax.googleapis.com/ajax/libs/jquer... https://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js — 200 — 32.8 KiB — 118 ms — h2https://cdn.pearltrees.com/v2static/css/homeremote/homemobile.css?20260420-19h14-10464cdn.pearltrees.com/v2static/css/hom... https://cdn.pearltrees.com/v2static/css/homeremote/homemobile.css?20260420-19h14-10464 — 200 — 2.2 KiB — 78 ms — h2https://netdna.bootstrapcdn.com/bootstrap/3.0.3/css/bootstrap.min.cssnetdna.bootstrapcdn.com/bootstrap/3... https://netdna.bootstrapcdn.com/bootstrap/3.0.3/css/bootstrap.min.css — 200 — 17.4 KiB — 94 ms — h2https://cdn.pearltrees.com/v2static/js/homeremote/homemobile.js?20260420-19h14-10464cdn.pearltrees.com/v2static/js/home... https://cdn.pearltrees.com/v2static/js/homeremote/homemobile.js?20260420-19h14-10464 — 200 — 1.7 KiB — 79 ms — h2https://cdnjs.cloudflare.com/ajax/libs/iScroll/5.1.1/iscroll-min.jscdnjs.cloudflare.com/ajax/libs/iScr... https://cdnjs.cloudflare.com/ajax/libs/iScroll/5.1.1/iscroll-min.js — 200 — 7.7 KiB — 91 ms — h2https://cdn.pearltrees.com/v2static/js/homeremote/carousel.js?20260420-19h14-10464cdn.pearltrees.com/v2static/js/home... https://cdn.pearltrees.com/v2static/js/homeremote/carousel.js?20260420-19h14-10464 — 200 — 7.8 KiB — 79 ms — h2https://cdnjs.cloudflare.com/ajax/libs/jquery.waitforimages/1.5.0/jquery.waitforimages.min.jscdnjs.cloudflare.com/ajax/libs/jque... https://cdnjs.cloudflare.com/ajax/libs/jquery.waitforimages/1.5.0/jquery.waitforimages.min.js — 200 — 958 B — 96 ms — h2https://cdn.pearltrees.com/v2static/asset/homeremote/logo.png?20260420-19h14-10464cdn.pearltrees.com/v2static/asset/h... https://cdn.pearltrees.com/v2static/asset/homeremote/logo.png?20260420-19h14-10464 — 200 — 11.1 KiB — 80 ms — h2https://www.pearltrees.com/s/statsapi/simpleCountwww.pearltrees.com/s/statsapi/simpl... https://www.pearltrees.com/s/statsapi/simpleCount — 200 — 415 B — 23 ms — http/1.1https://cdn.pearltrees.com/v2static/asset/homeremote/carousel/slideshow_main_light.png?20260420-19h14-10464cdn.pearltrees.com/v2static/asset/h... https://cdn.pearltrees.com/v2static/asset/homeremote/carousel/slideshow_main_light.png?20260420-19h14-10464 — 200 — 60.3 KiB — 6 ms — h2https://cdn.pearltrees.com/v2static/asset/homeremote/carousel/slideshow_add_light.png?20260420-19h14-10464cdn.pearltrees.com/v2static/asset/h... https://cdn.pearltrees.com/v2static/asset/homeremote/carousel/slideshow_add_light.png?20260420-19h14-10464 — 200 — 39.5 KiB — 7 ms — h2https://cdn2.pearltrees.com/v2static/asset/homeremote/carousel/slide_on.png?v4cdn2.pearltrees.com/v2static/asset/... https://cdn2.pearltrees.com/v2static/asset/homeremote/carousel/slide_on.png?v4 — 200 — 781 B — 60 ms — h2https://cdn2.pearltrees.com/v2static/asset/homeremote/carousel/slide_off.png?v4cdn2.pearltrees.com/v2static/asset/... https://cdn2.pearltrees.com/v2static/asset/homeremote/carousel/slide_off.png?v4 — 200 — 783 B — 61 ms — h2https://www.pearltrees.com/favicon.icowww.pearltrees.com/favicon.ico https://www.pearltrees.com/favicon.ico — 200 — 5.8 KiB — 24 ms — http/1.1
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 398ms · 36KB · €4/mo
ajax.googleapis.com
Other
Costly
Execution 225ms
Transfer 33 KB
Monthly Cost €2/mo
Unattributable
Other
Optional
Execution 103ms
Transfer 0 KB
Monthly Cost €1/mo
www.pearltrees.com
Other
Optional
Execution 70ms
Transfer 3 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • ajax.googleapis.com adds 225ms and costs ~€2/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

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

ajax.googleapis.com takes 225ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

Send Feedback