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.
1.73 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.26 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
549 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.010
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.81 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.
4.60 s
Page Load Progression
FPage Weight BudgetAction2.9 MB transferred, 116 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
DJS Execution CostAction2391ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.tvguide.com/a/neutron/836a9bd.modern.js | 647ms | 611ms | 1ms | 3rd |
| Unattributable | 527ms | 23ms | 0ms | 3rd |
| https://www.tvguide.com/ | 318ms | 15ms | 32ms | 3rd |
| https://www.tvguide.com/a/neutron/bb43265.modern.js | 254ms | 200ms | 3ms | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202510.1.0/otTCF.js | 214ms | 187ms | 6ms | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202510.1.0/otBannerSdk.js | 149ms | 97ms | 16ms | 3rd |
| https://www.tvguide.com/a/neutron/7caa04a.modern.js | 124ms | 116ms | 1ms | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604170101/pubads_impl.js?cb=31097946 | 79ms | 59ms | 18ms | 3rd |
| https://www.tvguide.com/cdn-cgi/challenge-platform/scripts/jsd/main.js | 78ms | 74ms | 1ms | 3rd |
FJS BundlesAction35 scripts, 1.1 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.tvguide.com/a/neutron/bb43265.modern.js | 604 KB | 354 KB (59%) | ✓ | 3rd |
| https://www.tvguide.com/a/neutron/0bbd75c.modern.js | 406 KB | 261 KB (64%) | ✓ | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604170101/pubads_impl.js?cb=31097946 | 187 KB | 140 KB (75%) | ✓ | 3rd |
| https://script.wikia.nocookie.net/fandom-ae-assets/platforms/prod/ADEN-13924b/tvguide-mtc/main.bundle.js | 98 KB | 73 KB (75%) | ✓ | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202510.1.0/otBannerSdk.js | 123 KB | 58 KB (47%) | ✓ | 3rd |
| https://c.amazon-adsystem.com/aax2/apstag.js | 91 KB | 57 KB (63%) | ✓ | 3rd |
| https://www.tvguide.com/a/neutron/836a9bd.modern.js | 105 KB | 45 KB (43%) | ✓ | 3rd |
| https://static.wikia.nocookie.net/silversurfer/video/prod/standalone-dist/standAlone_RV_VideoPlayer.js | 58 KB | 44 KB (77%) | ✓ | 3rd |
| https://urs-k8s.tvguide.com/sdk/urs.js | 50 KB | 42 KB (84%) | ✓ | 3rd |
| https://01.cdn.mediatradecraft.com/tv-guide/main/main.js | 64 KB | 37 KB (58%) | ✓ | 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 InventoryAction116 resources · 2.9 MB · 1.1 MB savings availableFIX
~1.1 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 116 resources | 2.9 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization39 images, 0 KB saveableREVIEW
A+Text CompressionAll text resources are compressedPASS
A+Font Loading2 fonts (41 KB)PASS
Web fonts
2
41 KB total
Render-blocking
0
of 2
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 HintsNo optimization neededPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall116 requests over 33590msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.tvguide.com www.tvguide.com | Other | 647ms | 105 KB | 43% | €10/mo | Costly |
Unattributable Unattributable | Other | 527ms | 0 KB | — | €8/mo | Costly |
www.tvguide.com www.tvguide.com | Other | 318ms | 179 KB | — | €5/mo | Costly |
www.tvguide.com www.tvguide.com | Other | 254ms | 604 KB | 59% | €4/mo | Costly |
OneTrust cdn.cookielaw.org | Consent | 214ms | 18 KB | — | €3/mo | Essential |
OneTrust cdn.cookielaw.org | Consent | 149ms | 123 KB | 47% | €2/mo | Essential |
www.tvguide.com www.tvguide.com | Other | 124ms | 5 KB | — | €2/mo | Optional |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 79ms | 187 KB | 75% | €1/mo | Optional |
www.tvguide.com www.tvguide.com | Other | 78ms | 0 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- www.tvguide.com adds 647ms and costs ~€10/month
- Unattributable adds 527ms and costs ~€8/month
- www.tvguide.com adds 318ms and costs ~€5/month
- www.tvguide.com adds 254ms 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
www.tvguide.com takes 647ms 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
Unattributable takes 527ms 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.tvguide.com takes 318ms 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.tvguide.com takes 254ms 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
59% of www.tvguide.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
75% of securepubads.g.doubleclick.net'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