Performance
· 27 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
2.27 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
7.28 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
441 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.006
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
3.16 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.
7.29 s
Page Load Progression
DThird-Party ImpactAction93% third-party, 0 ms blockingFIX
BImage Optimization7 images, 0 KB saveableREVIEW
CJS Execution CostAction1251ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-NJSK2XEW8F | 565ms | 484ms | 70ms | 3rd |
| https://topicsinsider.blogspot.com/?m=1 | 475ms | 51ms | 6ms | 1st |
| Unattributable | 211ms | 7ms | 0ms | 1st |
BJS Bundles9 scripts, 108 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-NJSK2XEW8F | 186 KB | 69 KB (37%) | ✓ | 3rd |
| https://www.blogger.com/static/v1/widgets/2650890479-widgets.js | 52 KB | 39 KB (75%) | ✓ | 3rd |
| https://topicsinsider.blogspot.com/js/cookienotice.js | 2 KB | — | ✓ | 1st |
| https://topicsinsider.blogspot.com/feeds/posts/default/-/Finance?alt=json-in-script&max-results=4&callback=tiFeedCallback1 | 5 KB | — | ✓ | 1st |
| https://topicsinsider.blogspot.com/feeds/posts/default/-/Business%20%26%20Engineering?alt=json-in-script&max-results=4&callback=tiFeedCallback2 | 3 KB | — | ✓ | 1st |
| https://topicsinsider.blogspot.com/feeds/posts/default/-/Lifestyle?alt=json-in-script&max-results=4&callback=tiFeedCallback3 | 4 KB | — | ✓ | 1st |
| https://topicsinsider.blogspot.com/feeds/posts/default/-/Games?alt=json-in-script&max-results=4&callback=tiFeedCallback4 | 4 KB | — | ✓ | 1st |
| https://topicsinsider.blogspot.com/feeds/posts/default/-/News?alt=json-in-script&max-results=4&callback=tiFeedCallback5 | 3 KB | — | ✓ | 1st |
| https://topicsinsider.blogspot.com/feeds/posts/default?alt=json-in-script&max-results=20&callback=tiFeedCallback6 | 29 KB | — | ✓ | 1st |
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
BDocument CompressionDocument response uses gzip; brotli would be ~20% smallerREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
BHTTP Cachingprivate, max-age=0REVIEW
private, max-age=0
| Directive | Value | Meaning |
|---|---|---|
| private | — | Only browser cache, not CDN/proxy |
| max-age | 0 | Cache for 0 seconds |
APage Weight Budget896 KB transferred, 27 requestsPASS
A+Text CompressionAll text resources are compressedPASS
A+Font Loading3 fonts (155 KB)PASS
Web fonts
3
155 KB total
Render-blocking
0
of 3
Dominant font-display
swap
Most common across fonts
Font loading timeline
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 CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints2 hints, 0 missing preconnectsPASS
Current Resource Hints
2 resource hints configured
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Main HTML Cache-ControlMain HTML max-age=0 (≤ 5min) is appropriatePASS
AServer Response Intelligence2 server-response signal(s) detectedPASS
APage Weight Inventory27 resources · 896 KB · 108 KB savings availablePASS
~108.0 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 27 resources | 896.3 KiB | ||||||
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
AJavaScript Blocking1 JS blocking issue(s) detectedPASS
A+CSS Performance DepthNo CSS performance depth issues detectedPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Google Cloud
Asset CompressionNo text asset hosts to measureINFO
Network Waterfall27 requests over 3310msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Google Tag Manager www.googletagmanager.com | Tag Manager | 565ms | 186 KB | 37% | €6/mo | Costly |
These scripts may cost more than they're worth
- Google Tag Manager adds 565ms and costs ~€6/month
45% of JavaScript execution time comes from third-party scripts.
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
Google Tag Manager takes 565ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Image Optimization10 images, 0 KB total, 0 KB wastedINFO
Image Optimization Audit
Total Images
10
Total Size
0 KB
Oversized
1