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https://merging.games

Performance

· 27 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
97
GRADE
A+
FIX
0
REVIEW
3
PASS
20
INFO
4

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

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

1.05 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.

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.

1.05 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
27
20 PASS 3 REVIEW
B
JS Execution Cost
553ms total JS execution
REVIEW
553ms total JS execution
Warning::
https://merging.games/: 364ms CPU time
Info::
Unattributable: 189ms CPU time

Main Thread Breakdown

Other 41% Style & Layout 31% Rendering 12% Script Evaluation 10% Parse HTML & CSS 5%
ScriptTotalScriptingParse/CompileParty
https://merging.games/364ms48ms1ms1st
Unattributable189ms6ms0ms1st
B
Server-Timing Observability
No Server-Timing header found
REVIEW
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.
B
HTTP Caching
public, max-age=0, must-revalidate
REVIEW
public, max-age=0, must-revalidate
Info::
Cache-Control header is set
Got: public, max-age=0, must-revalidate
Info::
ETag present — enables conditional (304) responses
Cache-Control

public, max-age=0, must-revalidate

DirectiveValueMeaning
public—Any cache may store this response
max-age0Cache for 0 seconds
must-revalidate—Must recheck with server after expiry
A+
Page Weight Budget
675 KB transferred, 12 requests
PASS
675 KB transferred, 12 requests
Info::
Page weighs 716 KB (675 KB transferred)
Info::
12 HTTP requests
Info::
Estimated 0.14 g CO2 per page load
675 KB / 2.4 MB budget
675 KB transferred
12 requests
0.14 g CO2 per page load
Images 654.7 KiB 97%
HTML 10.0 KiB 1%
CSS 4.6 KiB 1%
JavaScript 4.5 KiB 1%
Other 872 B 0%
0 2.4 MB 4.9 MB
Under budget
A+
Third-Party Impact
No third-party resources
PASS
No third-party resources
Info::
No third-party resources detected
No third-party resources detected — all resources are first-party.
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
7 images, 0 KB saveable
PASS
7 images, 0 KB saveable
Info::
All images are well-optimized
7 images 655 KB
0 oversized -0 KB
1 legacy format
0 missing dimensions CLS risk
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
2 scripts, 0 KB unused
PASS
2 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://merging.games/app.js2 KB—✓1st
https://merging.games/ga4.js2 KB—✓1st
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+
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
PASS
HTTP/3 advertised via Alt-Svc
Info::
HTTP/3 (QUIC) is supported
First-load mobile users on cellular networks see meaningful latency improvements with HTTP/3. The QUIC transport collapses TLS + TCP handshakes into one and recovers faster from packet loss.
A+
Document Compression
Document response uses brotli
PASS
Document response uses brotli
Info::
Main HTML response uses brotli (Content-Encoding: br)
Brotli is the best text-compression algorithm for general use, ~20% smaller than gzip on average (40% on smaller files). Modern browsers all support it.
A+
LCP Image Preload
LCP preload audit not available
PASS
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+
Main HTML Cache-Control
Main HTML max-age=0 (≤ 5min) is appropriate
PASS
Main HTML max-age=0 (≤ 5min) is appropriate
Info::
Main HTML max-age=0 (≤ 5min) is appropriate
Got: public, max-age=0, must-revalidate
A
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Warning::
Compressed response missing `Vary` header
The page is served with `Content-Encoding: br` but has no `Vary` header. Without `Vary: Accept-Encoding`, intermediary caches (corporate proxies, ISP caches) may serve the compressed variant to clients that didn't send the matching `Accept-Encoding` -- the client sees garbled bytes. Add `Vary: Accept-Encoding` whenever the response is conditionally compressed.
Info::
`ETag` present -- conditional GET supported
A+
Page Weight Inventory
12 resources · 675 KB · 0 KB savings available
PASS
12 resources · 675 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 675 KB
12 resources · 674.7 KiB · 0 third-party Within 1MB page-weight target
Image 97% · 655.6 KiB
Document 1% · 10.0 KiB
CSS 1% · 4.6 KiB
JavaScript 1% · 4.5 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+
JavaScript Blocking
No render-blocking JS or document.write usage detected
PASS
No render-blocking JS or document.write usage detected
Info::
No JavaScript blocking issues detected
A+
CSS Performance Depth
No CSS performance depth issues detected
PASS
No CSS performance depth issues detected
Info::
No CSS performance depth issues 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

Asset Compression
No text asset hosts to measure
INFO
No text asset hosts to measure
Info::
No third-party or subdomain host served enough text assets to measure
Asset compression is measured per host, from one HEAD request against a sampled resource. Pages that serve all their JS and CSS from the document's own origin are covered by the document compression check instead.
Network Waterfall
12 requests over 574ms
INFO
0 ms 500 ms 1.0 s FCP 1.0 s LCP 1.0 shttps://merging.games// https://merging.games/ — 200 — 10.0 KiB — 99 ms — h2https://merging.games/styles.css/styles.css https://merging.games/styles.css — 200 — 4.6 KiB — 66 ms — h2https://merging.games/app.js/app.js https://merging.games/app.js — 200 — 2.4 KiB — 52 ms — h2https://merging.games/covers/skycraft-reviewed-1200.webp/covers/skycraft-reviewed-1200.webp https://merging.games/covers/skycraft-reviewed-1200.webp — 200 — 181.1 KiB — 247 ms — h2https://merging.games/brand.svg/brand.svg https://merging.games/brand.svg — 200 — 471 B — 49 ms — h2https://merging.games/ga4.js/ga4.js https://merging.games/ga4.js — 200 — 2.1 KiB — 51 ms — h3https://merging.games/covers/minecraft-x-halflife-reviewed-1200.webp/covers/minecraft-x-halflife-review... https://merging.games/covers/minecraft-x-halflife-reviewed-1200.webp — 200 — 136.5 KiB — 341 ms — h3https://merging.games/covers/halfcraft-reviewed-1200.webp/covers/halfcraft-reviewed-1200.web... https://merging.games/covers/halfcraft-reviewed-1200.webp — 200 — 54.8 KiB — 250 ms — h3https://merging.games/covers/valcraft-reviewed-1200.webp/covers/valcraft-reviewed-1200.webp https://merging.games/covers/valcraft-reviewed-1200.webp — 200 — 97.6 KiB — 303 ms — h3https://merging.games/covers/silentdoom-reviewed-1200.webp/covers/silentdoom-reviewed-1200.we... https://merging.games/covers/silentdoom-reviewed-1200.webp — 200 — 99.4 KiB — 311 ms — h3https://merging.games/covers/falloutcraft-reviewed-1200.webp/covers/falloutcraft-reviewed-1200.... https://merging.games/covers/falloutcraft-reviewed-1200.webp — 200 — 84.8 KiB — 234 ms — h3https://merging.games/brand.svg/brand.svg https://merging.games/brand.svg — 200 — 872 B — 56 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Real-User Performance (CrUX)
Field metrics from the Chrome User Experience Report
INFO

Chrome User Experience (CrUX)

Real-user metrics from the Chrome UX Report (2026-09-16 — 2026-10-13)

LCP (p75)

703 ms

98% good

INP (p75)

48 ms

98% good

CLS (p75)

0.000

93% good

FCP (p75)

635 ms

TTFB (p75)

329 ms

This origin passes Core Web Vitals assessment
Image Optimization
25 images, 251 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

25

Total Size

251 KB

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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