Performance
· 17 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.
5.77 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
15.00 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.67 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.285
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
6.74 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.
16.42 s
Page Load Progression
DPage Weight BudgetAction2.5 MB transferred, 134 requestsFIX
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
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction5501ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://consist.mta.info/vuejs/apps/homepage/index.min.js | 1622ms | 1327ms | 49ms | 3rd |
| Unattributable | 1118ms | 20ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-RBMJZ3P3MQ | 819ms | 561ms | 89ms | 3rd |
| https://www.mta.info/ | 707ms | 33ms | 8ms | 3rd |
| https://consist.mta.info/search-icon/index.js | 342ms | 331ms | 5ms | 3rd |
| https://maps.googleapis.com/maps/api/js?key=AIzaSyApz95yUkEkciNmvj2ArI5QM9t1tScdpnA&libraries=places%2Cgeometry | 291ms | 193ms | 92ms | 3rd |
| https://consist.mta.info/vuejs/apps/vendor/index.min.js | 124ms | 5ms | 79ms | 3rd |
| https://www.mta.info/core/assets/vendor/jquery/jquery.min.js?v=3.7.1 | 102ms | 82ms | 14ms | 3rd |
| https://www.mta.info/themes/custom/bootstrap_mta/dist/mta-style.css?tdswpm | 97ms | 0ms | 0ms | 3rd |
| https://maps.googleapis.com/maps-api-v3/api/js/64/9c/common.js | 87ms | 67ms | 19ms | 3rd |
Showing top 10 of 13 scripts
FJS BundlesAction58 scripts, 581 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://consist.mta.info/search-icon/index.js | 183 KB | 132 KB (72%) | ✓ | 3rd |
| https://consist.mta.info/vuejs/apps/vendor/index.min.js | 158 KB | 98 KB (62%) | ✓ | 3rd |
| https://maps.googleapis.com/maps/api/js?key=AIzaSyApz95yUkEkciNmvj2ArI5QM9t1tScdpnA&libraries=places%2Cgeometry | 181 KB | 95 KB (53%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-RBMJZ3P3MQ | 178 KB | 67 KB (38%) | ✓ | 3rd |
| https://consist.mta.info/vuejs/apps/homepage/index.min.js | 73 KB | 58 KB (80%) | ✓ | 3rd |
| https://consist.mta.info/vuejs/apps/common/index.min.js | 56 KB | 31 KB (55%) | ✓ | 3rd |
| https://maps.googleapis.com/maps-api-v3/api/js/64/9c/common.js | 37 KB | 27 KB (74%) | ✓ | 3rd |
| https://maps.googleapis.com/maps-api-v3/api/js/64/9c/util.js | 70 KB | 27 KB (38%) | ✓ | 3rd |
| https://maps.googleapis.com/maps-api-v3/api/js/64/9c/controls.js | 26 KB | 24 KB (91%) | ✓ | 3rd |
| https://maps.googleapis.com/maps-api-v3/api/js/64/9c/map.js | 25 KB | 23 KB (90%) | ✓ | 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
FPage Weight InventoryAction134 resources · 2.5 MB · 581 KB savings availableFIX
~581.1 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 134 resources | 2.5 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization41 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
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 Loading3 fonts (99 KB)PASS
Web fonts
3
99 KB total
Render-blocking
0
of 3
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
- 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 ~7 KB and ~14 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall134 requests over 2522msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
consist.mta.info consist.mta.info | Other | 1622ms | 73 KB | 80% | $22/mo | Costly |
Unattributable Unattributable | Other | 1118ms | 0 KB | — | $15/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 819ms | 178 KB | 38% | $11/mo | Costly |
www.mta.info www.mta.info | Other | 707ms | 13 KB | — | $9/mo | Costly |
consist.mta.info consist.mta.info | Other | 342ms | 183 KB | 72% | $5/mo | Costly |
maps.googleapis.com maps.googleapis.com | Other | 291ms | 181 KB | 53% | $4/mo | Costly |
consist.mta.info consist.mta.info | Other | 124ms | 158 KB | 62% | $2/mo | Optional |
www.mta.info www.mta.info | Other | 102ms | 30 KB | — | $1/mo | Optional |
www.mta.info www.mta.info | Other | 97ms | 106 KB | — | $1/mo | Optional |
maps.googleapis.com maps.googleapis.com | Other | 87ms | 37 KB | 74% | $1/mo | Optional |
maps.googleapis.com maps.googleapis.com | Other | 76ms | 70 KB | 38% | $1/mo | Optional |
consist.mta.info consist.mta.info | Other | 65ms | 45 KB | — | $1/mo | Optional |
jsDelivr cdn.jsdelivr.net | CDN | 52ms | 27 KB | — | $1/mo | Optional |
These scripts may cost more than they're worth
- consist.mta.info adds 1622ms and costs ~$22/month
- Unattributable adds 1118ms and costs ~$15/month
- Google Tag Manager adds 819ms and costs ~$11/month
- www.mta.info adds 707ms and costs ~$9/month
- consist.mta.info adds 342ms and costs ~$5/month
- maps.googleapis.com adds 291ms and costs ~$4/month
100% 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
consist.mta.info takes 1622ms 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
80% of consist.mta.info'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
Unattributable takes 1118ms 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
Google Tag Manager takes 819ms 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.mta.info takes 707ms 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
consist.mta.info takes 342ms 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
72% of consist.mta.info'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
maps.googleapis.com takes 291ms 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
53% of maps.googleapis.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
62% of consist.mta.info'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
74% of maps.googleapis.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