Performance
· 26 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.
3.50 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
16.00 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.84 s
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.
7.50 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.
16.01 s
Page Load Progression
FPage Weight BudgetAction24.1 MB transferred, 95 requestsFIX
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
Source: web.dev
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.
Source: web.dev
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction5489ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 1629ms | 34ms | 0ms | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-ERFEBS3F9L | 904ms | 654ms | 63ms | 3rd |
| https://www.mrpov.com/js/mrpov-vendor.js?v=1.4.4 | 897ms | 525ms | 78ms | 3rd |
| https://www.mrpov.com/ | 830ms | 11ms | 4ms | 3rd |
| https://matomo.yppcdn.com/matomo.js | 513ms | 454ms | 53ms | 3rd |
| https://script.hotjar.com/modules.e762be2b6b709245aabb.js | 289ms | 251ms | 33ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=UA-1815564-21&cx=c>m=4e68o0 | 259ms | 212ms | 43ms | 3rd |
| https://www.google-analytics.com/analytics.js | 168ms | 157ms | 9ms | 3rd |
DJS BundlesAction10 scripts, 397 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://matomo.yppcdn.com/matomo.js | 199 KB | 126 KB (63%) | ✓ | 3rd |
| https://www.mrpov.com/js/mrpov-vendor.js?v=1.4.4 | 142 KB | 104 KB (74%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=UA-1815564-21&cx=c>m=4e68o0 | 129 KB | 66 KB (51%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-ERFEBS3F9L | 187 KB | 63 KB (34%) | ✓ | 3rd |
| https://script.hotjar.com/modules.e762be2b6b709245aabb.js | 57 KB | 37 KB (65%) | ✓ | 3rd |
| https://www.mrpov.com/js/modernizr.js?v=1.4.4 | 4 KB | — | ✓ | 3rd |
| https://www.mrpov.com/js/mrpov.js?v=1.4.4 | 5 KB | — | ✓ | 3rd |
| https://static.hotjar.com/c/hotjar-1740121.js?sv=6 | 8 KB | — | ✓ | 3rd |
| https://www.google-analytics.com/analytics.js | 21 KB | — | ✓ | 3rd |
| https://matomo.yppcdn.com/plugins/HeatmapSessionRecording/configs.php?idsite=578&trackerid=xdPWsg&url=https%3A%2F%2Fwww.mrpov.com%2F | 0 KB | — | ✓ | 3rd |
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
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
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
DPage Weight InventoryAction95 resources · 24.1 MB · 397 KB savings availableFIX
~396.6 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 95 resources | 24.1 MiB | ||||||
CImage OptimizationAction69 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
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.
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.
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.
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
CCompression AlgorithmActionMain response served uncompressedREVIEW
CMain HTML Cache-ControlActionMain HTML max-age=7200 (~120min) is aggressiveREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
BJavaScript Blocking2 JS blocking issue(s) detectedREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading2 fonts (146 KB)PASS
Web fonts
2
146 KB total
Render-blocking
0
of 2
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Convert to woff2 for ~30% smaller file size
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 ~109 KB and ~218 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Server Response Intelligence1 server-response signal(s) detectedPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
A+CSS Performance DepthNo CSS performance depth issues detectedPASS
AHTTP Cachingmax-age=7200 (2 hours)PASS
max-age=7200
| Directive | Value | Meaning |
|---|---|---|
| max-age | 7200 | Cache for 2 hours |
Network Waterfall95 requests over 3461msINFO
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 | 904ms | 187 KB | 34% | $12/mo | Costly |
www.mrpov.com www.mrpov.com | Other | 897ms | 142 KB | 74% | $12/mo | Costly |
www.mrpov.com www.mrpov.com | Other | 830ms | 66 KB | — | $11/mo | Costly |
Matomo matomo.yppcdn.com | Analytics | 513ms | 199 KB | 63% | $7/mo | Costly |
Hotjar script.hotjar.com | Session Replay | 289ms | 57 KB | 65% | $4/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 259ms | 129 KB | 51% | $3/mo | Costly |
Google Analytics www.google-analytics.com | Analytics | 168ms | 21 KB | — | $2/mo | Optional |
These scripts may cost more than they're worth
- Google Tag Manager adds 904ms and costs ~$12/month
- www.mrpov.com adds 897ms and costs ~$12/month
- www.mrpov.com adds 830ms and costs ~$11/month
- Matomo adds 513ms and costs ~$7/month
- Hotjar adds 289ms and costs ~$4/month
- Google Tag Manager adds 259ms and costs ~$3/month
70% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.
Learn more ▾ ▴
Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.
Source: web.dev
Google Tag Manager takes 904ms 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
www.mrpov.com takes 897ms 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
74% of www.mrpov.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
www.mrpov.com takes 830ms 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
Matomo takes 513ms 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
63% of Matomo's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
Hotjar takes 289ms 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
65% of Hotjar's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
Google Tag Manager takes 259ms 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
51% of Google Tag Manager's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
Image Optimization64 images, 5126 KB total, 9 KB wastedINFO
Image Optimization Audit
Total Images
64
Total Size
5126 KB
Oversized
1
Wasted
9 KB