JavaScript is 979 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 979 KB
Info::
i
73 HTTP requests
Info::
i
Estimated 0.35 g CO2 per page load
1.7 MBtransferred
73 requests
0.35 g CO2 per page load
JavaScript979.0 KiB57%
Images504.1 KiB29%
Other96.6 KiB6%
Fonts73.8 KiB4%
CSS34.9 KiB2%
HTML29.6 KiB2%
Other693 B0%
Other548 B0%
Other0 B0%
02.4 MB4.9 MB
Approaching limit
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
C
Image Optimization
Action
31 images, 0 KB saveable
REVIEW
31 images, 0 KB saveable
Warning::
!
https://thediplomat.com/wp-content/uploads/2026/04... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://thediplomat.com/wp-content/uploads/2025/04... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://thediplomat.com/wp-content/uploads/2026/04... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://thediplomat.com/wp-content/uploads/2026/04... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://thediplomat.com/wp-content/uploads/2025/07... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://thediplomat.com/wp-content/uploads/2026/04... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images.thediplomat.com/v1/td-list-xl-2/202... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://thediplomat.com/wp-content/uploads/2021/02... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://thediplomat.com/wp-content/uploads/2026/02... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://thediplomat.com/wp-content/uploads/2026/04... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://thediplomat.com/wp-content/uploads/2023/03... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://thediplomat.com/wp-content/uploads/2025/09... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://thediplomat.com/wp-content/uploads/2026/04... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://thediplomat.com/wp-content/uploads/2025/10... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://thediplomat.com/wp-content/uploads/2026/04... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://thediplomat.com/wp-content/uploads/2026/04... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
31images504 KB
0oversized-0 KB
21legacy format
17missing dimensionsCLS 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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
Set explicit width and height to prevent CLS.
Why this matters
Performance issues directly impact user engagement and conversion rates.
B
HTTP Caching
no-cache, must-revalidate, max-age=0
REVIEW
no-cache, must-revalidate, max-age=0
Info::
✓
Cache-Control header is set
Got: no-cache, must-revalidate, max-age=0
Info::
i
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control
no-cache, must-revalidate, max-age=0
Directive
Value
Meaning
no-cache
—
Cache but always revalidate first
must-revalidate
—
Must recheck with server after expiry
max-age
0
Cache for 0 seconds
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+
Font Loading
2 fonts (74 KB)
PASS
2 fonts (74 KB)
Info::
i
2 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
2
74 KB total
Render-blocking
0
of 2
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
o-0bIpQlx3QUlC5A4PNB6Ry...woff2swap
Size35 KB
Load time45 ms
Start366 ms
RiskFOUT — text flashes from fallback to web font
o-0ZIpQlx3QUlC5A4PNr4C5...woff2swap
Size39 KB
Load time50 ms
Start373 ms
RiskFOUT — 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
2 hints, 0 missing preconnects
PASS
2 hints, 0 missing preconnects
Info::
✓
Page uses 2 resource hint(s)
Current Resource Hints
preconnect
1
preload—
dns-prefetch
1
prefetch—
2 resource hints configured
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+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall
73 requests over 2577ms
INFO
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
63%of JavaScript execution is third-party
First-party Third-party1737ms · 610KB · $30/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
www.flashb.id
www.flashb.id
Other
469ms
182 KB
59%
$8/mo
Costly
Unattributable
Unattributable
Other
362ms
0 KB
—
$6/mo
Costly
static.fastcmp.com
static.fastcmp.com
Other
321ms
61 KB
35%
$6/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
188ms
172 KB
38%
$3/mo
Optional
static.fastcmp.com
static.fastcmp.com
Other
162ms
54 KB
—
$3/mo
Optional
cse.google.com
cse.google.com
Other
106ms
4 KB
—
$2/mo
Optional
apis.google.com
apis.google.com
Other
78ms
34 KB
—
$1/mo
Optional
www.google.com
www.google.com
Other
50ms
103 KB
51%
$1/mo
Optional
www.flashb.id
Other
Costly
Execution469ms
Transfer182 KB
Unused59%
Monthly Cost$8/mo
Unattributable
Other
Costly
Execution362ms
Transfer0 KB
Monthly Cost$6/mo
static.fastcmp.com
Other
Costly
Execution321ms
Transfer61 KB
Unused35%
Monthly Cost$6/mo
Google Tag Manager
Tag Manager
Optional
Execution188ms
Transfer172 KB
Unused38%
Monthly Cost$3/mo
static.fastcmp.com
Other
Optional
Execution162ms
Transfer54 KB
Monthly Cost$3/mo
cse.google.com
Other
Optional
Execution106ms
Transfer4 KB
Monthly Cost$2/mo
apis.google.com
Other
Optional
Execution78ms
Transfer34 KB
Monthly Cost$1/mo
www.google.com
Other
Optional
Execution50ms
Transfer103 KB
Unused51%
Monthly Cost$1/mo
These scripts may cost more than they're worth
www.flashb.id adds 469ms and costs ~$8/month
Unattributable adds 362ms and costs ~$6/month
static.fastcmp.com adds 321ms and costs ~$6/month
63% of JavaScript execution time comes from third-party scripts.
Why this matters
Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.
Learn more ▾▴
Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.
Source: web.dev / HTTP Archive Web Almanac
www.flashb.id takes 469ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
Why this matters
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
59% of www.flashb.id's code is unused. The script may be loading features you don't use.
Why this matters
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
Unattributable takes 362ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
Why this matters
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
static.fastcmp.com takes 321ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
Why this matters
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
51% of www.google.com's code is unused. The script may be loading features you don't use.
Why this matters
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.