Performance
· 15 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.
1.55 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
4.36 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
519 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.864
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
3.45 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.
8.46 s
Page Load Progression
1.0 s
2.1 s
3.1 s
4.2 s
5.2 s
6.2 s
7.3 s
8.3 sFPage Weight BudgetAction7.8 MB transferred, 267 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
Subset fonts to include only used characters, or switch to system font stacks.
Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).
Source: web.dev font loading
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 CostAction4103ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.volaris.com/vendor.912c37ef2c041255.js | 1354ms | 1164ms | 3ms | 3rd |
| Unattributable | 779ms | 99ms | 0ms | 3rd |
| https://www.volaris.com/ | 595ms | 6ms | 0ms | 3rd |
| https://www.volaris.com/scripts.72e665a9ff72b911.js | 286ms | 274ms | 3ms | 3rd |
| https://mapa.volaris.com/_next/static/chunks/afee056f49fd75b2.js | 217ms | 210ms | 4ms | 3rd |
| https://tags.tiqcdn.com/utag/volaris/main/prod/utag.js | 191ms | 160ms | 6ms | 3rd |
| https://cdn.optimizely.com/js/973095788.js | 128ms | 103ms | 19ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-91N05BETCF&cx=c>m=4e64f0h2 | 93ms | 75ms | 16ms | 3rd |
| https://mapa.volaris.com/es/embed/carousel | 93ms | 0ms | 0ms | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202409.1.0/otBannerSdk.js | 91ms | 53ms | 17ms | 3rd |
Showing top 10 of 14 scripts
FJS BundlesAction90 scripts, 1.3 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.volaris.com/main.85741021d5accdc4.js | 737 KB | 430 KB (58%) | ✓ | 3rd |
| https://www.volaris.com/vendor.912c37ef2c041255.js | 534 KB | 297 KB (56%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-91N05BETCF | 168 KB | 113 KB (67%) | ✓ | 3rd |
| https://cdn.optimizely.com/js/973095788.js | 172 KB | 82 KB (48%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-91N05BETCF&cx=c>m=4e64f0h2 | 169 KB | 68 KB (40%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-S4SJ | 156 KB | 65 KB (41%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-SDRVQFJ88F&cx=c&_slc=1 | 152 KB | 62 KB (41%) | ✓ | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202409.1.0/otBannerSdk.js | 112 KB | 60 KB (54%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=DC-14241618&cx=c>m=4e64f0h2 | 131 KB | 59 KB (45%) | ✓ | 3rd |
| https://connect.facebook.net/en_US/fbevents.js | 96 KB | 31 KB (33%) | ✓ | 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 InventoryAction267 resources · 7.8 MB · 1.3 MB savings availableFIX
~1.3 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 267 resources | 7.8 MiB | ||||||
CImage OptimizationAction57 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
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 Loading11 fonts (1357 KB)PASS
Web fonts
11
1357 KB total
Render-blocking
0
of 11
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
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- 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
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- 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 ~835 KB and ~1670 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
AHTTP Cachingmax-age=86400 (1 day)PASS
max-age=86400
| Directive | Value | Meaning |
|---|---|---|
| max-age | 86400 | Cache for 1 day |
Network Waterfall267 requests over 8037msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.volaris.com www.volaris.com | Other | 1354ms | 534 KB | 56% | MX$100/mo | Costly |
Unattributable Unattributable | Other | 779ms | 0 KB | — | MX$58/mo | Costly |
www.volaris.com www.volaris.com | Other | 595ms | 6 KB | — | MX$44/mo | Costly |
www.volaris.com www.volaris.com | Other | 286ms | 35 KB | 65% | MX$21/mo | Costly |
mapa.volaris.com mapa.volaris.com | Other | 217ms | 0 KB | — | MX$16/mo | Costly |
tags.tiqcdn.com tags.tiqcdn.com | Other | 191ms | 41 KB | — | MX$14/mo | Optional |
Optimizely cdn.optimizely.com | A/B Testing | 128ms | 172 KB | 48% | MX$10/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 93ms | 169 KB | 40% | MX$7/mo | Optional |
mapa.volaris.com mapa.volaris.com | Other | 93ms | 0 KB | — | MX$7/mo | Optional |
OneTrust cdn.cookielaw.org | Consent | 91ms | 112 KB | 54% | MX$7/mo | Essential |
mapa.volaris.com mapa.volaris.com | Other | 79ms | 0 KB | — | MX$6/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 78ms | 152 KB | 41% | MX$6/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 68ms | 131 KB | 45% | MX$5/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 52ms | 156 KB | 41% | MX$4/mo | Optional |
These scripts may cost more than they're worth
- www.volaris.com adds 1354ms and costs ~MX$100/month
- Unattributable adds 779ms and costs ~MX$58/month
- www.volaris.com adds 595ms and costs ~MX$44/month
- www.volaris.com adds 286ms and costs ~MX$21/month
- mapa.volaris.com adds 217ms and costs ~MX$16/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
www.volaris.com takes 1354ms 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
56% of www.volaris.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
Unattributable takes 779ms 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.volaris.com takes 595ms 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.volaris.com takes 286ms 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 www.volaris.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
mapa.volaris.com takes 217ms 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
54% of OneTrust'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