Performance
· 17 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.
8.80 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
12.22 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
186 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.019
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
8.80 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.
16.68 s
Page Load Progression
534 ms
1.1 s 1.6 s 2.1 s
2.7 s
3.2 s 3.7 s
4.3 sDThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS BundlesAction44 scripts, 350 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 362 KB | 242 KB (67%) | ✓ | 3rd |
| https://www.linuxjournal.com/core/assets/vendor/jquery/jquery.min.js?v=3.6.3 | 88 KB | 52 KB (59%) | ✓ | 3rd |
| https://cdn.consentmanager.net/delivery/js/cmp_en.min.js | 101 KB | 36 KB (36%) | ✓ | 3rd |
| https://www.linuxjournal.com/themes/linuxjournal/js/accessibility.js | 47 KB | 21 KB (44%) | ✓ | 3rd |
| https://www.linuxjournal.com/themes/contrib/bootstrap/js/attributes.js?snzigw | 10 KB | — | ✗ | 3rd |
| https://www.linuxjournal.com/core/misc/drupal.js?v=9.5.11 | 7 KB | — | ✓ | 3rd |
| https://d.delivery.consentmanager.net/delivery/cmp.php?&cdid=f46fb9b4e114&h=https%3A%2F%2Fwww.linuxjournal.com%2F&cmpregulationkey=GDPR&&l=en&o=1776897146540 | 1 KB | — | ✓ | 3rd |
| https://a.fsdn.com/con/js/sftheme/cmp2.js | 22 KB | — | ✗ | 3rd |
| https://www.linuxjournal.com/core/assets/vendor/underscore/underscore-min.js?v=1.13.6 | 19 KB | — | ✓ | 3rd |
| https://www.linuxjournal.com/core/misc/polyfills/element.matches.js?v=9.5.11 | 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
DPage Weight InventoryAction93 resources · 1.9 MB · 350 KB savings availableFIX
~349.8 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 93 resources | 1.9 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CPage Weight BudgetAction1.9 MB transferred, 93 requestsREVIEW
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
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
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
CImage OptimizationAction13 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.
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
CJS Execution CostAction1328ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.linuxjournal.com/ | 418ms | 44ms | 4ms | 3rd |
| Unattributable | 312ms | 7ms | 0ms | 3rd |
| https://cdn.consentmanager.net/delivery/customdata/bV8xLndfMTEzMTkucl9HRFBSLmxfZW4uZF8yNDkyLnhfMTUudi5wLnRfMjQ5Mi54dF8xMTA.js | 192ms | 181ms | 6ms | 3rd |
| https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js | 164ms | 82ms | 82ms | 3rd |
| https://a.fsdn.com/con/js/sftheme/cmp2.js | 113ms | 104ms | 6ms | 3rd |
| https://cdn.consentmanager.net/delivery/js/cmp_en.min.js | 73ms | 29ms | 34ms | 3rd |
| https://www.linuxjournal.com/core/assets/vendor/jquery/jquery.min.js?v=3.6.3 | 55ms | 38ms | 8ms | 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 Loading4 fonts (661 KB)PASS
Web fonts
4
661 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Convert to woff2 for ~30% smaller file size
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- 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 ~431 KB and ~862 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall93 requests over 3922msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.linuxjournal.com www.linuxjournal.com | Other | 418ms | 55 KB | — | $6/mo | Costly |
Unattributable Unattributable | Other | 312ms | 0 KB | — | $4/mo | Costly |
cdn.consentmanager.net cdn.consentmanager.net | Other | 192ms | 16 KB | — | $3/mo | Optional |
www.gstatic.com www.gstatic.com | Other | 164ms | 362 KB | 67% | $2/mo | Optional |
a.fsdn.com a.fsdn.com | Other | 113ms | 22 KB | — | $2/mo | Optional |
cdn.consentmanager.net cdn.consentmanager.net | Other | 73ms | 101 KB | 36% | $1/mo | Optional |
www.linuxjournal.com www.linuxjournal.com | Other | 55ms | 88 KB | 59% | $1/mo | Optional |
These scripts may cost more than they're worth
- www.linuxjournal.com adds 418ms and costs ~$6/month
- Unattributable adds 312ms 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.linuxjournal.com takes 418ms 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 312ms 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
67% of www.gstatic.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
59% of www.linuxjournal.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