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https://otomedis.my.id

Performance

· 25 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
89
GRADE
B
FIX
2
REVIEW
6
PASS
15
INFO
2

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

Mobile Desktop
79
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
89
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.
82
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.

2.59 s

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

4.81 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.

0.015

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

2.59 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.

4.81 s

Page Load Progression

731 ms
1.5 s
2.2 s
2.9 s
3.7 s
4.4 s
5.1 s
5.8 s
Checks
25
15 PASS 6 REVIEW 2 FIX
F
JS Execution Cost
Action
4098ms total JS execution
FIX
4098ms total JS execution
Warning::
https://otomedis.my.id/: 3829ms CPU time
Warning::
Unattributable: 269ms CPU time

Main Thread Breakdown

Other 80% Script Evaluation 14%
ScriptTotalScriptingParse/CompileParty
https://otomedis.my.id/3829ms534ms2ms1st
Unattributable269ms5ms0ms1st
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.
Info::
Last-Modified header present

No Cache-Control header

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

B
Third-Party Impact
44% third-party, 0 ms blocking
REVIEW
44% third-party, 0 ms blocking
Info::
Third-party code accounts for 44% of page weight (291.3 KiB of 657.5 KiB)
Info::
Third-party blocking time is low (0 ms)
56%
44%
First-party Third-party
B
JS Bundles
5 scripts, 62 KB unused
REVIEW
5 scripts, 62 KB unused
Warning::
https://cdn.jsdelivr.net/npm/chart.js@4.4.4/dist/c...: 62 KB unused (89%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 62 KB
62 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdn.jsdelivr.net/npm/chart.js@4.4.4/dist/chart.umd.min.js70 KB62 KB (89%)✓3rd
https://otomedis.my.id/i18n.js4 KB—✓1st
https://otomedis.my.id/data.js2 KB—✓1st
https://otomedis.my.id/app.js11 KB—✓1st
https://otomedis.my.id/sidebar_fix.js0 KB—✓1st

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
Main HTML Cache-Control
No Cache-Control header on main HTML response
REVIEW
No Cache-Control header on main HTML response
Info::
Main HTML response has no Cache-Control header
Without an explicit Cache-Control, browsers fall back to heuristic caching (~10% of Last-Modified age). Set `Cache-Control: no-cache` or `max-age=300` for HTML to control freshness explicitly -- prevents stale auth state and SPA shell drift.
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
JavaScript Blocking
2 JS blocking issue(s) detected
REVIEW
2 JS blocking issue(s) detected
Warning::
5 render-blocking <script src> tag(s) without async/defer
Each `<script src=...>` without `async`, `defer`, or `type="module"` blocks HTML parsing while the browser fetches and executes it. The block lasts the entire round-trip + execution time -- on slow networks this translates directly into LCP delay. Add `defer` (executes after parse, in source order) for scripts that interact with the DOM, or `async` (executes whenever ready) for analytics / independent scripts. Module scripts (`type="module"`) are deferred by default.
Warning::
Total JS execution time is 4.1 s -- over the 3.5s budget
Total JavaScript execution (parse + compile + run) across all scripts exceeds 3.5 seconds. On low-end devices that becomes 7-15+ seconds and shows up directly in TBT and INP. Reduce by: tree-shaking unused dependencies, code-splitting (dynamic `import()`), removing or deferring third-party tracking, and replacing heavy frameworks where they're not needed.
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Page Weight Budget
657 KB transferred, 13 requests
PASS
657 KB transferred, 13 requests
Info::
Page weighs 1.0 MB (657 KB transferred)
Info::
Fonts are 201 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 201 KB
Info::
13 HTTP requests
Info::
Estimated 0.13 g CO2 per page load
657 KB / 2.4 MB budget
657 KB transferred
13 requests
0.13 g CO2 per page load
Fonts 200.9 KiB 31%
Images 193.3 KiB 29%
Other 147.5 KiB 22%
JavaScript 87.7 KiB 13%
CSS 25.3 KiB 4%
HTML 2.9 KiB 0%
0 2.4 MB 4.9 MB
Under budget

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

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
1 images, 0 KB saveable
PASS
1 images, 0 KB saveable
Info::
All images are well-optimized
1 images 193 KB
0 oversized -0 KB
1 legacy format
0 missing dimensions CLS risk
A+
Font Loading
2 fonts (201 KB)
PASS
2 fonts (201 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

201 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 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 2.6 s LCP 4.8 shttps://fonts.gstatic.com/s/inter/v20/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa1ZL7W0Q5nw.woff2UcC73FwrK3iLTeHuS_nVMrM... https://fonts.gstatic.com/s/inter/v20/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa1ZL7W0Q5nw.woff2 — 47.3 KiB — 61 ms — font-display: swaphttps://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.1/webfonts/fa-solid-900.woff2fa-solid-900.woff2 https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.1/webfonts/fa-solid-900.woff2 — 153.5 KiB — 79 ms — font-display: swap
UcC73FwrK3iLTeHuS_nVMrM... woff2 swap
Size 47 KB
Load time 61 ms
Start 815 ms
Risk FOUT — text flashes from fallback to web font
fa-solid-900.woff2 woff2 swap
Size 154 KB
Load time 79 ms
Start 815 ms
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 ~77 KB and ~154 ms

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
1 hints, 0 missing preconnects
PASS
1 hints, 0 missing preconnects
Info::
Page uses 1 resource hint(s)

Current Resource Hints

preconnect
1
preload
—
dns-prefetch
—
prefetch
—

1 resource hints configured

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+
Compression Algorithm
Main response uses brotli
PASS
Main 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+
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Info::
`Vary` header declared: Accept-Encoding
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::
`Last-Modified` present -- timestamp-based conditional GET supported
Consider also setting `ETag` for stronger revalidation -- ETags are content hashes that don't suffer from clock-skew or DST issues. Last-Modified alone is functional for conditional GETs and not a bug.
A
Page Weight Inventory
13 resources · 657 KB · 62 KB savings available
PASS
13 resources · 657 KB · 62 KB savings available
Info::
Within 1MB page-weight target
Got: 657 KB
Info::
~62 KB of savings available
Warning::
5 third-party resources (44% of weight)
13 resources · 657.5 KiB · 5 third-party Within 1MB page-weight target
Image 52% · 340.7 KiB
Font 31% · 200.9 KiB
JavaScript 13% · 87.7 KiB
CSS 4% · 25.3 KiB
Document 0% · 2.9 KiB

~61.8 KiB of savings available

Remove unused JavaScript: 61.8 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+
CSS Performance Depth
No CSS performance depth issues detected
PASS
No CSS performance depth issues detected
Info::
No CSS performance depth issues detected
Network Waterfall
13 requests over 3534ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 2.6 s LCP 4.8 shttps://otomedis.my.id// https://otomedis.my.id/ — 200 — 2.9 KiB — 568 ms — h2https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swapfonts.googleapis.com/css2?family=In... https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap — 200 — 1.2 KiB — 120 ms — h2https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.1/css/all.min.csscdnjs.cloudflare.com/ajax/libs/font... https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.1/css/all.min.css — 200 — 19.1 KiB — 120 ms — h3https://cdn.jsdelivr.net/npm/chart.js@4.4.4/dist/chart.umd.min.jscdn.jsdelivr.net/npm/chart.js@4.4.4... https://cdn.jsdelivr.net/npm/chart.js@4.4.4/dist/chart.umd.min.js — 200 — 70.1 KiB — 120 ms — h2https://otomedis.my.id/style.css/style.css https://otomedis.my.id/style.css — 200 — 5.0 KiB — 195 ms — h2https://otomedis.my.id/logo.png/logo.png https://otomedis.my.id/logo.png — 200 — 193.3 KiB — 1.3 s — h2https://otomedis.my.id/i18n.js/i18n.js https://otomedis.my.id/i18n.js — 200 — 4.3 KiB — 197 ms — h2https://otomedis.my.id/data.js/data.js https://otomedis.my.id/data.js — 200 — 2.5 KiB — 1.2 s — h2https://otomedis.my.id/app.js/app.js https://otomedis.my.id/app.js — 200 — 10.8 KiB — 1.2 s — h2https://otomedis.my.id/sidebar_fix.js/sidebar_fix.js https://otomedis.my.id/sidebar_fix.js — 404 — 73 B — 187 ms — h2https://fonts.gstatic.com/s/inter/v20/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa1ZL7W0Q5nw.woff2fonts.gstatic.com/s/inter/v20/UcC73... https://fonts.gstatic.com/s/inter/v20/UcC73FwrK3iLTeHuS_nVMrMxCp50SjIa1ZL7W0Q5nw.woff2 — 200 — 47.3 KiB — 61 ms — h3https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.1/webfonts/fa-solid-900.woff2cdnjs.cloudflare.com/ajax/libs/font... https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.1/webfonts/fa-solid-900.woff2 — 200 — 153.5 KiB — 79 ms — h3https://otomedis.my.id/favicon.ico/favicon.ico https://otomedis.my.id/favicon.ico — 200 — 147.5 KiB — 1.6 s — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization
2 images, 386 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

2

Total Size

386 KB

2 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.

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