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https://pscp.tv

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
88
GRADE
B
FIX
2
REVIEW
2
PASS
9
INFO
2

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

Mobile Desktop
96
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
48
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
77
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.

1.04 s

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

1.08 s

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

59 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.

1.04 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.

1.58 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
15
9 PASS 2 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 (707.5 KiB of 708.1 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

C
JS Bundles
Action
7 scripts, 198 KB unused
REVIEW
7 scripts, 198 KB unused
Warning::
https://assets.pscp.tv/univ/main-17706232d90b51cd1...: 198 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 198 KB
198 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://assets.pscp.tv/univ/main-17706232d90b51cd120d.js490 KB198 KB (40%)✓3rd
https://assets.pscp.tv/resources/bugsnag-4.min.js11 KB—✓3rd
https://assets.pscp.tv/univ/chunk-translations-en-2b77cae61d3a37d3.js27 KB—✓3rd
https://assets.pscp.tv/univ/chunk-react-intl-locale-en-af79742f139cd487.js1 KB—✓3rd
https://www.google-analytics.com/analytics.js21 KB—✓3rd
https://assets.pscp.tv/univ/chunk-root-view-495d357c6aa1bccb.js9 KB—✓3rd
https://assets.pscp.tv/univ/chunk-discover-view-9d5f693a1a58d4b7.js8 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

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Page Weight Budget
708 KB transferred, 18 requests
PASS
708 KB transferred, 18 requests
Info::
Page weighs 2.3 MB (708 KB transferred)
Warning::
JavaScript is 567 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 567 KB
Info::
18 HTTP requests
Info::
Estimated 0.15 g CO2 per page load
708 KB / 2.4 MB budget
708 KB transferred
18 requests
0.15 g CO2 per page load
JavaScript 567.2 KiB 80%
CSS 51.7 KiB 7%
Fonts 35.5 KiB 5%
Other 33.2 KiB 5%
Images 10.4 KiB 1%
HTML 9.3 KiB 1%
Other 890 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Under budget

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

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
Image Optimization
2 images, 0 KB saveable
PASS
2 images, 0 KB saveable
Warning::
https://assets.pscp.tv/univ/file-loader/periscope-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
2 images 10 KB
0 oversized -0 KB
2 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

A+
JS Execution Cost
135ms total JS execution
PASS
135ms total JS execution
Info::
https://assets.pscp.tv/univ/main-17706232d90b51cd1...: 135ms CPU time
Warning::
Third-party scripts: 135ms (100% of total)

Main Thread Breakdown

Script Evaluation 61% Script Parsing & Compilation 15% Other 14% Style & Layout 7%
ScriptTotalScriptingParse/CompileParty
https://assets.pscp.tv/univ/main-17706232d90b51cd120d.js135ms100ms32ms3rd
A+
Font Loading
2 fonts (36 KB)
PASS
2 fonts (36 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

36 KB total

Render-blocking

0

of 2

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 1.0 s LCP 1.1 shttps://assets.pscp.tv/css/fonts/museosans_500_macroman/MuseoSans_500-webfont.woff2MuseoSans_500-webfont.w... https://assets.pscp.tv/css/fonts/museosans_500_macroman/MuseoSans_500-webfont.woff2 — 17.7 KiB — 58 ms — font-display: swaphttps://assets.pscp.tv/css/fonts/museosans_700_macroman/MuseoSans_700-webfont.woff2MuseoSans_700-webfont.w... https://assets.pscp.tv/css/fonts/museosans_700_macroman/MuseoSans_700-webfont.woff2 — 17.9 KiB — 55 ms — font-display: swap
MuseoSans_500-webfont.w... woff2 swap
Size 18 KB
Load time 58 ms
Start 879 ms
Risk FOUT — text flashes from fallback to web font
MuseoSans_700-webfont.w... woff2 swap
Size 18 KB
Load time 55 ms
Start 879 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
18 resources · 708 KB · 198 KB savings available
PASS
18 resources · 708 KB · 198 KB savings available
Info::
Within 1MB page-weight target
Got: 708 KB
Info::
~198 KB of savings available
Warning::
17 third-party resources (100% of weight)
Info::
1 resources over 200KB
18 resources · 708.1 KiB · 17 third-party Within 1MB page-weight target
JavaScript 80% · 567.2 KiB
CSS 7% · 51.7 KiB
Image 6% · 43.0 KiB
Font 5% · 35.5 KiB
Document 1% · 9.9 KiB
Other 0% · 744 B

~197.7 KiB of savings available

Remove unused JavaScript: 197.7 KiB
Network Waterfall
18 requests over 2221ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 1.0 s LCP 1.1 shttps://pscp.tv// https://pscp.tv/ — 302 — 533 B — 142 ms — http/1.1https://www.pscp.tv/www.pscp.tv/ https://www.pscp.tv/ — 200 — 9.3 KiB — 629 ms — http/1.1https://assets.pscp.tv/css/stylesheet.32aee36716acfac3fac1f7c13dba3191.cssassets.pscp.tv/css/stylesheet.32aee... https://assets.pscp.tv/css/stylesheet.32aee36716acfac3fac1f7c13dba3191.css — 200 — 51.7 KiB — 75 ms — h2https://assets.pscp.tv/resources/bugsnag-4.min.jsassets.pscp.tv/resources/bugsnag-4.... https://assets.pscp.tv/resources/bugsnag-4.min.js — 200 — 11.0 KiB — 75 ms — h2https://www.pscp.tv/v/images/largepin.svgwww.pscp.tv/v/images/largepin.svg https://www.pscp.tv/v/images/largepin.svg — 200 — 2.1 KiB — 39 ms — http/1.1https://assets.pscp.tv/univ/file-loader/periscope-goodbye-60ea03f4b71a6639ead8a3a135813b0e.svgassets.pscp.tv/univ/file-loader/per... https://assets.pscp.tv/univ/file-loader/periscope-goodbye-60ea03f4b71a6639ead8a3a135813b0e.svg — 200 — 8.2 KiB — 57 ms — h2https://assets.pscp.tv/univ/main-17706232d90b51cd120d.jsassets.pscp.tv/univ/main-17706232d9... https://assets.pscp.tv/univ/main-17706232d90b51cd120d.js — 200 — 490.4 KiB — 79 ms — h2https://assets.pscp.tv/css/fonts/museosans_500_macroman/MuseoSans_500-webfont.woff2assets.pscp.tv/css/fonts/museosans_... https://assets.pscp.tv/css/fonts/museosans_500_macroman/MuseoSans_500-webfont.woff2 — 200 — 17.7 KiB — 58 ms — h2https://assets.pscp.tv/css/fonts/museosans_700_macroman/MuseoSans_700-webfont.woff2assets.pscp.tv/css/fonts/museosans_... https://assets.pscp.tv/css/fonts/museosans_700_macroman/MuseoSans_700-webfont.woff2 — 200 — 17.9 KiB — 55 ms — h2https://api.amplitude.com/api.amplitude.com/ https://api.amplitude.com/ — 400 — 146 B — 550 ms — h2https://assets.pscp.tv/univ/chunk-translations-en-2b77cae61d3a37d3.jsassets.pscp.tv/univ/chunk-translati... https://assets.pscp.tv/univ/chunk-translations-en-2b77cae61d3a37d3.js — 200 — 26.7 KiB — 22 ms — h2https://assets.pscp.tv/univ/chunk-react-intl-locale-en-af79742f139cd487.jsassets.pscp.tv/univ/chunk-react-int... https://assets.pscp.tv/univ/chunk-react-intl-locale-en-af79742f139cd487.js — 200 — 1.4 KiB — 21 ms — h2https://www.google-analytics.com/analytics.jswww.google-analytics.com/analytics.... https://www.google-analytics.com/analytics.js — 200 — 20.9 KiB — 91 ms — h2https://assets.pscp.tv/univ/chunk-root-view-495d357c6aa1bccb.jsassets.pscp.tv/univ/chunk-root-view... https://assets.pscp.tv/univ/chunk-root-view-495d357c6aa1bccb.js — 200 — 8.9 KiB — 21 ms — h2https://assets.pscp.tv/univ/chunk-discover-view-9d5f693a1a58d4b7.jsassets.pscp.tv/univ/chunk-discover-... https://assets.pscp.tv/univ/chunk-discover-view-9d5f693a1a58d4b7.js — 200 — 7.9 KiB — 19 ms — h2https://proxsee.pscp.tv/api/v2/helloproxsee.pscp.tv/api/v2/hello https://proxsee.pscp.tv/api/v2/hello — 200 — 0 B — 556 ms — h2https://assets.pscp.tv/images/favicon.icoassets.pscp.tv/images/favicon.ico https://assets.pscp.tv/images/favicon.ico — 200 — 32.6 KiB — 19 ms — h2https://proxsee.pscp.tv/api/v2/helloproxsee.pscp.tv/api/v2/hello https://proxsee.pscp.tv/api/v2/hello — 200 — 744 B — 527 ms — h2
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 135ms · 490KB · $2/mo
assets.pscp.tv
Other
Optional
Execution 135ms
Transfer 490 KB
Unused 40%
Monthly Cost $2/mo

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

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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