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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
86
GRADE
B
FIX
1
REVIEW
4
PASS
10
INFO
2

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

Mobile Desktop
38
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
90
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
77
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
85
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.

3.66 s

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

6.76 s

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

427 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.445

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

3.66 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.

6.76 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
10 PASS 4 REVIEW 1 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 (782.6 KiB of 782.8 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
B
Image Optimization
17 images, 0 KB saveable
REVIEW
17 images, 0 KB saveable
Warning::
https://a.fsdn.com/con/img/bolt.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
17 images 357 KB
0 oversized -0 KB
8 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

C
JS Execution Cost
Action
1747ms total JS execution
REVIEW
1747ms total JS execution
Warning::
https://a.fsdn.com/sd/m/assets/standard_libs-77131...: 638ms CPU time
Warning::
https://m.slashdot.org/: 290ms CPU time
Info::
https://m.slashdot.org/cdn-cgi/challenge-platform/...: 236ms CPU time
Info::
Unattributable: 223ms CPU time
Info::
https://cdn.consentmanager.net/delivery/customdata...: 170ms CPU time
Warning::
Third-party scripts: 1747ms (100% of total)

Main Thread Breakdown

Script Evaluation 53% Other 17% Style & Layout 12% Parse HTML & CSS 8% Script Parsing & Compilation 6%
ScriptTotalScriptingParse/CompileParty
https://a.fsdn.com/sd/m/assets/standard_libs-7713187021bd1ae9f75af9293a0ac4ea.js638ms394ms10ms3rd
https://m.slashdot.org/290ms53ms8ms3rd
https://m.slashdot.org/cdn-cgi/challenge-platform/scripts/jsd/main.js236ms206ms3ms3rd
Unattributable223ms5ms0ms3rd
https://cdn.consentmanager.net/delivery/customdata/bV8xLndfMTIxMjYucl9HRFBSLmxfZW4uZF8yNDkyLnhfMTUudi5wLnRfMjQ5Mi54dF84Mg.js170ms159ms6ms3rd
https://a.fsdn.com/con/js/sftheme/cmp2.js?2025-07111ms97ms9ms3rd
https://cdn.consentmanager.net/delivery/js/cmp_en.min.js79ms27ms49ms3rd
B
JS Bundles
10 scripts, 71 KB unused
REVIEW
10 scripts, 71 KB unused
Warning::
https://cdn.consentmanager.net/delivery/js/cmp_en....: 36 KB unused (36%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://a.fsdn.com/sd/m/assets/application.min.js?...: 35 KB unused (66%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://a.fsdn.com/con/js/sftheme/cmp2.js?2025-07: unminified — 9 KB could be saved
Info::
Total unused JavaScript: 71 KB
71 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdn.consentmanager.net/delivery/js/cmp_en.min.js100 KB36 KB (36%)✓3rd
https://a.fsdn.com/sd/m/assets/application.min.js?v=2.2153 KB35 KB (66%)✓3rd
https://a.fsdn.com/con/js/sftheme/cmp2.js?2025-0722 KB—✗3rd
https://a.fsdn.com/sd/m/assets/standard_libs-7713187021bd1ae9f75af9293a0ac4ea.js36 KB—✓3rd
https://a.fsdn.com/sd/m/assets/phone_templates.min.js?v=2.126 KB—✓3rd
https://d.delivery.consentmanager.net/delivery/cmp.php?&cdid=dba15d148b97&h=https%3A%2F%2Fm.slashdot.org%2F&cmpregulationkey=GDPR&&l=en&o=17762954578631 KB—✓3rd
https://c.delivery.consentmanager.net/delivery/cmp.php?__cmpcc=1&id=12126&o=1776295457&h=https%3A%2F%2Fm.slashdot.org%2F&&l=en&odw=0&dlt=1&l=en&cmpregulationkey=GDPR1 KB—✓3rd
https://m.slashdot.org/cdn-cgi/challenge-platform/h/g/scripts/jsd/b0a7532ac8ec/main.js?12 KB—✓3rd
https://c.delivery.consentmanager.net/delivery/cmp.php?__cmpcc=2&__cmpfcc=1&id=12126&o=1776295458&h=https%3A%2F%2Fm.slashdot.org%2F&&l=en&odw=0&dlt=1&l=en&cmpregulationkey=GDPR3 KB—✓3rd
https://cdn.consentmanager.net/delivery/customdata/bV8xLndfMTIxMjYucl9HRFBSLmxfZW4uZF8yNDkyLnhfMTUudi5wLnRfMjQ5Mi54dF84Mg.js16 KB—✓3rd

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

B
HTTP Caching
no-cache
REVIEW
no-cache
Info::
Cache-Control header is set
Got: no-cache
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

no-cache

DirectiveValueMeaning
no-cache—Cache but always revalidate first
A
Page Weight Budget
783 KB transferred, 43 requests
PASS
783 KB transferred, 43 requests
Info::
Page weighs 1.9 MB (783 KB transferred)
Info::
43 HTTP requests
Info::
Estimated 0.16 g CO2 per page load
783 KB / 2.4 MB budget
783 KB transferred
43 requests
0.16 g CO2 per page load
Images 356.9 KiB 46%
JavaScript 250.8 KiB 32%
Fonts 75.3 KiB 10%
CSS 58.6 KiB 7%
Other 29.5 KiB 4%
HTML 10.3 KiB 1%
Other 1.4 KiB 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+
Font Loading
3 fonts (75 KB)
PASS
3 fonts (75 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

75 KB total

Render-blocking

0

of 3

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s FCP 3.7 s LCP 6.8 shttps://a.fsdn.com/sd/m/assets/fonts/open-sans-v40-latin_latin-ext-regular.woff2open-sans-v40-latin_lat... https://a.fsdn.com/sd/m/assets/fonts/open-sans-v40-latin_latin-ext-regular.woff2 — 25.1 KiB — 66 ms — font-display: swaphttps://a.fsdn.com/sd/m/assets/fonts/open-sans-v40-latin_latin-ext-700.woff2open-sans-v40-latin_lat... https://a.fsdn.com/sd/m/assets/fonts/open-sans-v40-latin_latin-ext-700.woff2 — 24.3 KiB — 45 ms — font-display: swaphttps://a.fsdn.com/sd/m/assets/fonts/open-sans-v40-latin_latin-ext-italic.woff2open-sans-v40-latin_lat... https://a.fsdn.com/sd/m/assets/fonts/open-sans-v40-latin_latin-ext-italic.woff2 — 25.8 KiB — 46 ms — font-display: swap
open-sans-v40-latin_lat... woff2 swap
Size 25 KB
Load time 66 ms
Start 700 ms
Risk FOUT — text flashes from fallback to web font
open-sans-v40-latin_lat... woff2 swap
Size 24 KB
Load time 45 ms
Start 765 ms
Risk FOUT — text flashes from fallback to web font
open-sans-v40-latin_lat... woff2 swap
Size 26 KB
Load time 46 ms
Start 765 ms
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 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
43 resources · 783 KB · 71 KB savings available
PASS
43 resources · 783 KB · 71 KB savings available
Info::
Within 1MB page-weight target
Got: 783 KB
Info::
~71 KB of savings available
Warning::
42 third-party resources (100% of weight)
43 resources · 782.8 KiB · 42 third-party Within 1MB page-weight target
Image 46% · 357.9 KiB
JavaScript 32% · 250.8 KiB
Font 10% · 75.3 KiB
CSS 7% · 58.6 KiB
Other 4% · 29.5 KiB
Document 1% · 10.8 KiB

~70.9 KiB of savings available

Remove unused JavaScript: 70.9 KiB
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: Cloudflare

Network Waterfall
43 requests over 1301ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s FCP 3.7 s LCP 6.8 shttps://slashdot.org// https://slashdot.org/ — 302 — 200 B — 246 ms — h2https://m.slashdot.org/m.slashdot.org/ https://m.slashdot.org/ — 200 — 10.3 KiB — 230 ms — h2https://a.fsdn.com/con/js/sftheme/cmp2.js?2025-07a.fsdn.com/con/js/sftheme/cmp2.js?2... https://a.fsdn.com/con/js/sftheme/cmp2.js?2025-07 — 200 — 21.7 KiB — 115 ms — h2https://a.fsdn.com/sd/m/assets/application.min.css?v=2.9a.fsdn.com/sd/m/assets/application.... https://a.fsdn.com/sd/m/assets/application.min.css?v=2.9 — 200 — 56.1 KiB — 130 ms — h2https://a.fsdn.com/con/css/sftheme/sandiego/cmp.css?2024-12-10a.fsdn.com/con/css/sftheme/sandiego... https://a.fsdn.com/con/css/sftheme/sandiego/cmp.css?2024-12-10 — 200 — 1.3 KiB — 99 ms — h2https://a.fsdn.com/sd/m/assets/ccpa.css?v=3a.fsdn.com/sd/m/assets/ccpa.css?v=3 https://a.fsdn.com/sd/m/assets/ccpa.css?v=3 — 200 — 1.2 KiB — 102 ms — h2https://a.fsdn.com/sd/m/assets/standard_libs-7713187021bd1ae9f75af9293a0ac4ea.jsa.fsdn.com/sd/m/assets/standard_lib... https://a.fsdn.com/sd/m/assets/standard_libs-7713187021bd1ae9f75af9293a0ac4ea.js — 200 — 35.8 KiB — 107 ms — h2https://a.fsdn.com/sd/m/assets/application.min.js?v=2.21a.fsdn.com/sd/m/assets/application.... https://a.fsdn.com/sd/m/assets/application.min.js?v=2.21 — 200 — 53.4 KiB — 132 ms — h2https://a.fsdn.com/sd/m/assets/phone_templates.min.js?v=2.12a.fsdn.com/sd/m/assets/phone_templa... https://a.fsdn.com/sd/m/assets/phone_templates.min.js?v=2.12 — 200 — 6.4 KiB — 103 ms — h2https://a.fsdn.com/con/img/bolt.pnga.fsdn.com/con/img/bolt.png https://a.fsdn.com/con/img/bolt.png — 200 — 10.3 KiB — 33 ms — h2https://d.delivery.consentmanager.net/delivery/cmp.php?&cdid=dba15d148b97&h=https%3A%2F%2Fm.slashdot.org%2F&cmpregulationkey=GDPR&&l=en&o=1776295457863d.delivery.consentmanager.net/deliv... https://d.delivery.consentmanager.net/delivery/cmp.php?&cdid=dba15d148b97&h=https%3A%2F%2Fm.slashdot.org%2F&cmpregulationkey=GDPR&&l=en&o=1776295457863 — 200 — 918 B — 112 ms — h2https://cdn.consentmanager.net/delivery/js/cmp_en.min.jscdn.consentmanager.net/delivery/js/... https://cdn.consentmanager.net/delivery/js/cmp_en.min.js — 200 — 100.5 KiB — 129 ms — h2https://m.slashdot.org/software/visit?idsite=7&ca=1&rec=1&e_c=Footer+Content+%7C+bolt+%7C+slashmob&e_a=Impression&rand=40839&url=https%3A%2F%2Fm.slashdot.org%2F&action_name=Footer+Content-Impressionm.slashdot.org/software/visit?idsit... https://m.slashdot.org/software/visit?idsite=7&ca=1&rec=1&e_c=Footer+Content+%7C+bolt+%7C+slashmob&e_a=Impression&rand=40839&url=https%3A%2F%2Fm.slashdot.org%2F&action_name=Footer+Content-Impression — 200 — 168 B — 203 ms — h2https://a.fsdn.com/sd/m/assets/fonts/open-sans-v40-latin_latin-ext-regular.woff2a.fsdn.com/sd/m/assets/fonts/open-s... https://a.fsdn.com/sd/m/assets/fonts/open-sans-v40-latin_latin-ext-regular.woff2 — 200 — 25.1 KiB — 66 ms — h3https://m.slashdot.org/api/v1/motd.json?api_key=MdotSLEDY7Ss2nEy7Op9lkKJctCqbGjWUBAUsatNKsQm.slashdot.org/api/v1/motd.json?api... https://m.slashdot.org/api/v1/motd.json?api_key=MdotSLEDY7Ss2nEy7Op9lkKJctCqbGjWUBAUsatNKsQ — 200 — 2.2 KiB — 220 ms — h3https://m.slashdot.org/api/v1/polls.json?limit=10&offset=0&api_key=MdotSLEDY7Ss2nEy7Op9lkKJctCqbGjWUBAUsatNKsQm.slashdot.org/api/v1/polls.json?li... https://m.slashdot.org/api/v1/polls.json?limit=10&offset=0&api_key=MdotSLEDY7Ss2nEy7Op9lkKJctCqbGjWUBAUsatNKsQ — 200 — 2.9 KiB — 213 ms — h3https://m.slashdot.org/api/v1/stories.json?limit=10&offset=0&api_key=MdotSLEDY7Ss2nEy7Op9lkKJctCqbGjWUBAUsatNKsQm.slashdot.org/api/v1/stories.json?... https://m.slashdot.org/api/v1/stories.json?limit=10&offset=0&api_key=MdotSLEDY7Ss2nEy7Op9lkKJctCqbGjWUBAUsatNKsQ — 200 — 13.5 KiB — 200 ms — h3https://m.slashdot.org/api/v1/activity.json?limit=3&offset=0&api_key=MdotSLEDY7Ss2nEy7Op9lkKJctCqbGjWUBAUsatNKsQ&types=friends%2Cfoesm.slashdot.org/api/v1/activity.json... https://m.slashdot.org/api/v1/activity.json?limit=3&offset=0&api_key=MdotSLEDY7Ss2nEy7Op9lkKJctCqbGjWUBAUsatNKsQ&types=friends%2Cfoes — 404 — 291 B — 534 ms — h3https://m.slashdot.org/api/v1/stories/mostdiscussed.json?orderby=recency&forceonefromtoday=1&api_key=MdotSLEDY7Ss2nEy7Op9lkKJctCqbGjWUBAUsatNKsQm.slashdot.org/api/v1/stories/mostd... https://m.slashdot.org/api/v1/stories/mostdiscussed.json?orderby=recency&forceonefromtoday=1&api_key=MdotSLEDY7Ss2nEy7Op9lkKJctCqbGjWUBAUsatNKsQ — 200 — 9.8 KiB — 215 ms — h3https://a.fsdn.com/sd/m/assets/white_background2X.pnga.fsdn.com/sd/m/assets/white_backgr... https://a.fsdn.com/sd/m/assets/white_background2X.png — 200 — 10.1 KiB — 32 ms — h3https://a.fsdn.com/sd/m/assets/dark_background2X.pnga.fsdn.com/sd/m/assets/dark_backgro... https://a.fsdn.com/sd/m/assets/dark_background2X.png — 200 — 17.7 KiB — 81 ms — h3https://a.fsdn.com/sd/m/assets/generated_sprites/preload-sprites.pnga.fsdn.com/sd/m/assets/generated_sp... https://a.fsdn.com/sd/m/assets/generated_sprites/preload-sprites.png — 200 — 60.2 KiB — 96 ms — h3https://a.fsdn.com/sd/m/assets/heroSmall_default2X.jpga.fsdn.com/sd/m/assets/heroSmall_de... https://a.fsdn.com/sd/m/assets/heroSmall_default2X.jpg — 200 — 14.9 KiB — 45 ms — h3https://a.fsdn.com/sd/m/assets/ajax_loader_2X.gifa.fsdn.com/sd/m/assets/ajax_loader_... https://a.fsdn.com/sd/m/assets/ajax_loader_2X.gif — 200 — 1.8 KiB — 45 ms — h3https://a.fsdn.com/sd/m/assets/generated_sprites/social-sprites.png?2a.fsdn.com/sd/m/assets/generated_sp... https://a.fsdn.com/sd/m/assets/generated_sprites/social-sprites.png?2 — 200 — 87.0 KiB — 110 ms — h3https://a.fsdn.com/sd/m/assets/loader1X-3e180de92dfa3c213cc48334d497d0e3.gifa.fsdn.com/sd/m/assets/loader1X-3e1... https://a.fsdn.com/sd/m/assets/loader1X-3e180de92dfa3c213cc48334d497d0e3.gif — 200 — 2.1 KiB — 51 ms — h3https://a.fsdn.com/sd/m/assets/loader2X-21f2aeb43facad3e3636519b958d7aa3.gifa.fsdn.com/sd/m/assets/loader2X-21f... https://a.fsdn.com/sd/m/assets/loader2X-21f2aeb43facad3e3636519b958d7aa3.gif — 200 — 3.0 KiB — 48 ms — h3https://a.fsdn.com/sd/m/assets/ajax_loader_1X-e010e8e47d852d46061444f1f5fa783b.gifa.fsdn.com/sd/m/assets/ajax_loader_... https://a.fsdn.com/sd/m/assets/ajax_loader_1X-e010e8e47d852d46061444f1f5fa783b.gif — 200 — 1.1 KiB — 47 ms — h3https://a.fsdn.com/sd/m/assets/ajax_loader_2X-de2407cb7fc8db02b64953a083e6005f.gifa.fsdn.com/sd/m/assets/ajax_loader_... https://a.fsdn.com/sd/m/assets/ajax_loader_2X-de2407cb7fc8db02b64953a083e6005f.gif — 200 — 1.8 KiB — 48 ms — h3https://a.fsdn.com/sd/m/assets/generated_sprites/social-sprites-d04a12db9d03f9a066c78f31bdf38fab.pnga.fsdn.com/sd/m/assets/generated_sp... https://a.fsdn.com/sd/m/assets/generated_sprites/social-sprites-d04a12db9d03f9a066c78f31bdf38fab.png — 200 — 84.1 KiB — 90 ms — h3
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s FCP 3.7 s LCP 6.8 shttps://slashdot.org// https://slashdot.org/ — 302 — 200 B — 246 ms — h2https://m.slashdot.org/m.slashdot.org/ https://m.slashdot.org/ — 200 — 10.3 KiB — 230 ms — h2https://a.fsdn.com/con/js/sftheme/cmp2.js?2025-07a.fsdn.com/con/js/sftheme/cmp2.js?2... https://a.fsdn.com/con/js/sftheme/cmp2.js?2025-07 — 200 — 21.7 KiB — 115 ms — h2https://a.fsdn.com/sd/m/assets/application.min.css?v=2.9a.fsdn.com/sd/m/assets/application.... https://a.fsdn.com/sd/m/assets/application.min.css?v=2.9 — 200 — 56.1 KiB — 130 ms — h2https://a.fsdn.com/con/css/sftheme/sandiego/cmp.css?2024-12-10a.fsdn.com/con/css/sftheme/sandiego... https://a.fsdn.com/con/css/sftheme/sandiego/cmp.css?2024-12-10 — 200 — 1.3 KiB — 99 ms — h2https://a.fsdn.com/sd/m/assets/ccpa.css?v=3a.fsdn.com/sd/m/assets/ccpa.css?v=3 https://a.fsdn.com/sd/m/assets/ccpa.css?v=3 — 200 — 1.2 KiB — 102 ms — h2https://a.fsdn.com/sd/m/assets/standard_libs-7713187021bd1ae9f75af9293a0ac4ea.jsa.fsdn.com/sd/m/assets/standard_lib... https://a.fsdn.com/sd/m/assets/standard_libs-7713187021bd1ae9f75af9293a0ac4ea.js — 200 — 35.8 KiB — 107 ms — h2https://a.fsdn.com/sd/m/assets/application.min.js?v=2.21a.fsdn.com/sd/m/assets/application.... https://a.fsdn.com/sd/m/assets/application.min.js?v=2.21 — 200 — 53.4 KiB — 132 ms — h2https://a.fsdn.com/sd/m/assets/phone_templates.min.js?v=2.12a.fsdn.com/sd/m/assets/phone_templa... https://a.fsdn.com/sd/m/assets/phone_templates.min.js?v=2.12 — 200 — 6.4 KiB — 103 ms — h2https://a.fsdn.com/con/img/bolt.pnga.fsdn.com/con/img/bolt.png https://a.fsdn.com/con/img/bolt.png — 200 — 10.3 KiB — 33 ms — h2https://d.delivery.consentmanager.net/delivery/cmp.php?&cdid=dba15d148b97&h=https%3A%2F%2Fm.slashdot.org%2F&cmpregulationkey=GDPR&&l=en&o=1776295457863d.delivery.consentmanager.net/deliv... https://d.delivery.consentmanager.net/delivery/cmp.php?&cdid=dba15d148b97&h=https%3A%2F%2Fm.slashdot.org%2F&cmpregulationkey=GDPR&&l=en&o=1776295457863 — 200 — 918 B — 112 ms — h2https://cdn.consentmanager.net/delivery/js/cmp_en.min.jscdn.consentmanager.net/delivery/js/... https://cdn.consentmanager.net/delivery/js/cmp_en.min.js — 200 — 100.5 KiB — 129 ms — h2https://m.slashdot.org/software/visit?idsite=7&ca=1&rec=1&e_c=Footer+Content+%7C+bolt+%7C+slashmob&e_a=Impression&rand=40839&url=https%3A%2F%2Fm.slashdot.org%2F&action_name=Footer+Content-Impressionm.slashdot.org/software/visit?idsit... https://m.slashdot.org/software/visit?idsite=7&ca=1&rec=1&e_c=Footer+Content+%7C+bolt+%7C+slashmob&e_a=Impression&rand=40839&url=https%3A%2F%2Fm.slashdot.org%2F&action_name=Footer+Content-Impression — 200 — 168 B — 203 ms — h2https://a.fsdn.com/sd/m/assets/fonts/open-sans-v40-latin_latin-ext-regular.woff2a.fsdn.com/sd/m/assets/fonts/open-s... https://a.fsdn.com/sd/m/assets/fonts/open-sans-v40-latin_latin-ext-regular.woff2 — 200 — 25.1 KiB — 66 ms — h3https://m.slashdot.org/api/v1/motd.json?api_key=MdotSLEDY7Ss2nEy7Op9lkKJctCqbGjWUBAUsatNKsQm.slashdot.org/api/v1/motd.json?api... https://m.slashdot.org/api/v1/motd.json?api_key=MdotSLEDY7Ss2nEy7Op9lkKJctCqbGjWUBAUsatNKsQ — 200 — 2.2 KiB — 220 ms — h3https://m.slashdot.org/api/v1/polls.json?limit=10&offset=0&api_key=MdotSLEDY7Ss2nEy7Op9lkKJctCqbGjWUBAUsatNKsQm.slashdot.org/api/v1/polls.json?li... https://m.slashdot.org/api/v1/polls.json?limit=10&offset=0&api_key=MdotSLEDY7Ss2nEy7Op9lkKJctCqbGjWUBAUsatNKsQ — 200 — 2.9 KiB — 213 ms — h3https://m.slashdot.org/api/v1/stories.json?limit=10&offset=0&api_key=MdotSLEDY7Ss2nEy7Op9lkKJctCqbGjWUBAUsatNKsQm.slashdot.org/api/v1/stories.json?... https://m.slashdot.org/api/v1/stories.json?limit=10&offset=0&api_key=MdotSLEDY7Ss2nEy7Op9lkKJctCqbGjWUBAUsatNKsQ — 200 — 13.5 KiB — 200 ms — 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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 1747ms · 185KB · €19/mo
a.fsdn.com
Other
Costly
Execution 638ms
Transfer 36 KB
Monthly Cost €7/mo
m.slashdot.org
Other
Costly
Execution 290ms
Transfer 10 KB
Monthly Cost €3/mo
m.slashdot.org
Other
Costly
Execution 236ms
Transfer 0 KB
Monthly Cost €3/mo
Unattributable
Other
Costly
Execution 223ms
Transfer 0 KB
Monthly Cost €2/mo
cdn.consentmanager.net
Other
Optional
Execution 170ms
Transfer 16 KB
Monthly Cost €2/mo
a.fsdn.com
Other
Optional
Execution 111ms
Transfer 22 KB
Monthly Cost €1/mo
cdn.consentmanager.net
Other
Optional
Execution 79ms
Transfer 100 KB
Unused 36%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • a.fsdn.com adds 638ms and costs ~€7/month
  • m.slashdot.org adds 290ms and costs ~€3/month
  • m.slashdot.org adds 236ms and costs ~€3/month
  • Unattributable adds 223ms 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

a.fsdn.com takes 638ms 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

m.slashdot.org takes 290ms 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

m.slashdot.org takes 236ms 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

Unattributable takes 223ms 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.

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