https://rcf-community.com
Performance
· 21 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
87
GRADE
B
FIX
4
REVIEW
5
PASS
10
INFO
2
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
75
53
96
100
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
1.19 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
4.04 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.
0.018
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.40 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.
4.08 s
Page Load Progression
511 ms
1.0 s
1.5 s
2.0 s 2.6 s 3.1 s 3.6 s
4.1 sChecks
2110 PASS 5 REVIEW 4 FIX
FPage Weight BudgetAction4.9 MB transferred, 131 requestsFIX
Page Weight Budget
Action4.9 MB transferred, 131 requests
4.9 MB transferred, 131 requests
Critical::
Page weighs 5.9 MB (4.9 MB transferred)
Warning::
Images are 4.2 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 4.2 MB
Info::
Fonts are 346 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 346 KB
Warning::
131 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 1.0 g CO2 per page load
4.9 MB transferred
131 requests
1.0 g CO2 per page load
Images 4.2 MiB 87%
Fonts 346.0 KiB 7%
JavaScript 148.3 KiB 3%
Other 71.7 KiB 1%
CSS 54.2 KiB 1%
Other 23.1 KiB 0%
HTML 7.8 KiB 0%
0 2.4 MB 4.9 MB
Over budget
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Why this matters
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
Source: web.dev
Subset fonts to include only used characters, or switch to system font stacks.
Why this matters
Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).
Source: web.dev font loading
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Why this matters
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DThird-Party ImpactAction62% third-party, 0 ms blockingFIX
Third-Party Impact
Action62% third-party, 0 ms blocking
62% third-party, 0 ms blocking
Warning::
Third-party code accounts for 62% of page weight (3.0 MiB of 4.9 MiB)
Info::
Third-party blocking time is low (0 ms)
38%
62%
First-party Third-party
DPage Weight InventoryAction131 resources · 4.9 MB · 22 KB savings availableFIX
Page Weight Inventory
Action131 resources · 4.9 MB · 22 KB savings available
131 resources · 4.9 MB · 22 KB savings available
Warning::
Page weight 4.9 MB exceeds 1 MB target by 3.9 MB
Got: 4.9 MB Expected: ≤ 1 MB
Warning::
113 third-party resources (62% of weight)
Info::
3 resources over 200KB
131 resources · 4.9 MiB · 113 third-party 3.9 MiB over 1MB target
Image 88% · 4.3 MiB
Font 7% · 346.0 KiB
JavaScript 3% · 148.3 KiB
CSS 1% · 54.2 KiB
Other 0% · 18.4 KiB
Document 0% · 12.7 KiB
~22.0 KiB of savings available
Remove unused JavaScript: 22.0 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 131 resources | 4.9 MiB | ||||||
DHTTP CachingActionno-store (uncacheable)FIX
HTTP Caching
Actionno-store (uncacheable)
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
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
| Directive | Value | Meaning |
|---|---|---|
| no-store | — | Never cache this response |
| no-cache | — | Cache but always revalidate first |
| must-revalidate | — | Must recheck with server after expiry |
BImage Optimization106 images, 0 KB saveableREVIEW
Image Optimization
106 images, 0 KB saveable
106 images, 0 KB saveable
Warning::
https://rcf-community.com/images/RCF-anim-test1.gi... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
106 images 4.2 MB
0 oversized -0 KB
106 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
BHTTP/3 (QUIC)HTTP/3 not advertisedREVIEW
HTTP/3 (QUIC)
HTTP/3 not advertised
HTTP/3 not advertised
Info::
HTTP/3 (QUIC) is not advertised
HTTP/3 isn't advertised via Alt-Svc and the worker didn't negotiate h3. HTTP/3 reduces handshake latency (1-RTT instead of 2-3 RTTs) and is more resilient on lossy connections. Most modern CDNs (Cloudflare, Fastly, AWS CloudFront, Google Cloud CDN) support HTTP/3 with a single config switch -- consider enabling for mobile-heavy workloads.
BCompression AlgorithmMain response uses gzip; brotli would be ~20% smallerREVIEW
Compression Algorithm
Main response uses gzip; brotli would be ~20% smaller
Main response uses gzip; brotli would be ~20% smaller
Info::
Main HTML response uses gzip (brotli would be ~20% smaller)
All current browsers support brotli. Most CDNs (Cloudflare, Fastly, AWS CloudFront, Vercel, Netlify) can switch from gzip to brotli with a single config flag. Origin servers (nginx, Apache) need a brotli module compiled in -- nginx-brotli or Apache mod_brotli.
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
Server-Timing Observability
No Server-Timing header found
No Server-Timing header found
Info::
No Server-Timing header found
Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
ActionWhether the site is served from green-energy infrastructure
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
Text Compression
All text resources are compressed
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+JS Execution Cost67ms total JS executionPASS
JS Execution Cost
67ms total JS execution
67ms total JS execution
Info::
https://rcf-community.com/: 67ms CPU time
Main Thread Breakdown
Other 48% Style & Layout 26% Script Evaluation 12% Parse HTML & CSS 6% Rendering 5% Script Parsing & Compilation 3%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://rcf-community.com/ | 67ms | 3ms | 1ms | 1st |
A+Font Loading7 fonts (346 KB)PASS
Font Loading
7 fonts (346 KB)
7 fonts (346 KB)
Info::
7 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
7
346 KB total
Render-blocking
0
of 7
Dominant font-display
swap
Most common across fonts
Font loading timeline
Transfer FOIT (block) FOUT (swap)
EdgeOfTheGalaxyPoster.ttf ttf swap
Size 6 KB
Load time 759 ms
Start 780 ms
Risk FOUT — text flashes from fallback to web font
- Convert to woff2 for ~30% smaller file size
AGENCYR.TTF ttf swap
Size 36 KB
Load time 787 ms
Start 781 ms
Risk FOUT — text flashes from fallback to web font
- Convert to woff2 for ~30% smaller file size
AGENCYB.TTF ttf swap
Size 37 KB
Load time 779 ms
Start 781 ms
Risk FOUT — text flashes from fallback to web font
- Convert to woff2 for ~30% smaller file size
Trekbats.ttf ttf swap
Size 27 KB
Load time 772 ms
Start 781 ms
Risk FOUT — text flashes from fallback to web font
- Convert to woff2 for ~30% smaller file size
LemonMilkRegular-X3XE2.otf otf swap
Size 24 KB
Load time 761 ms
Start 791 ms
Risk FOUT — text flashes from fallback to web font
- Convert to woff2 for ~30% smaller file size
66d715454104d24e.woff2 woff2 swap
Size 38 KB
Load time 34 ms
Start 991 ms
Risk FOUT — text flashes from fallback to web font
f72b5ce64feb2086.woff2 woff2 swap
Size 178 KB
Load time 95 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
- 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 ~128 KB and ~256 ms
A+JS Bundles6 scripts, 22 KB unusedPASS
JS Bundles
6 scripts, 22 KB unused
6 scripts, 22 KB unused
Warning::
https://rcf-community.com/js/jquery-3.6.0.min.js: 22 KB unused (73%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 22 KB
22 KB unused JavaScript
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://rcf-community.com/js/jquery-3.6.0.min.js | 30 KB | 22 KB (73%) | ✓ | 1st |
| https://www.gstatic.com/charts/loader.js | 19 KB | — | ✓ | 3rd |
| https://rcf-community.com/js/shadowbox.js | 19 KB | — | ✓ | 1st |
| https://rcf-community.com/js/html.js | 0 KB | — | ✓ | 1st |
| https://discord.com/assets/c114e7c6ec68f068.js | 71 KB | — | ✓ | 3rd |
| https://discord.com/cdn-cgi/challenge-platform/h/b/scripts/jsd/e694063b5082/main.js? | 9 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
A+Resource CachingAll resources properly cachedPASS
Resource Caching
All resources properly cached
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+Critical Rendering PathNo render-blocking resourcesPASS
Critical Rendering Path
No render-blocking resources
No render-blocking resources
Info::
No render-blocking resources detected
A+Resource HintsNo optimization neededPASS
Resource Hints
No optimization needed
No optimization needed
Info::
No resource hint issues
A+LCP Image PreloadLCP preload audit not availablePASS
LCP Image Preload
LCP preload audit not available
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+Main HTML Cache-ControlMain HTML uses no-store -- correct for sensitive/dynamic contentPASS
Main HTML Cache-Control
Main HTML uses no-store -- correct for sensitive/dynamic content
Main HTML uses no-store -- correct for sensitive/dynamic content
Info::
Main HTML uses no-store -- correct for sensitive/dynamic content
Got: no-store, no-cache, must-revalidate
A+Server Response Intelligence2 server-response signal(s) detectedPASS
Server Response Intelligence
2 server-response signal(s) detected
2 server-response signal(s) detected
Info::
`Vary` header declared: Accept-Encoding,User-Agent
The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).
Info::
No `ETag` or `Last-Modified` -- conditional GET not supported
Without either header, browsers can't issue conditional GETs and refresh always re-downloads the full response body even when nothing changed. Add `ETag: "<hash>"` (or `Last-Modified: <date>`) on cacheable responses; the server returns 304 Not Modified when the client's cached copy is still valid, saving bandwidth.
Network Waterfall131 requests over 1771msINFO
Network Waterfall
131 requests over 1771ms
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization2 images, 259 KB total, 192 KB wastedINFO
Image Optimization
2 images, 259 KB total, 192 KB wasted
Image Optimization Audit
Total Images
2
Total Size
259 KB
Oversized
1
Wasted
192 KB
1 missing dimensions 1 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.