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https://authy.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
82
GRADE
B
FIX
2
REVIEW
5
PASS
6
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
87
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
87
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

1.21 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

1.90 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

0 ms

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.

1.49 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.

1.90 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
15
6 PASS 5 REVIEW 2 FIX
D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (1.2 MiB of 1.2 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

B
Page Weight Budget
1.2 MB transferred, 55 requests
REVIEW
1.2 MB transferred, 55 requests
Info::
Page weighs 3.3 MB (1.2 MB transferred)
Warning::
JavaScript is 556 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 556 KB
Info::
Fonts are 339 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 339 KB
Info::
55 HTTP requests
Info::
Estimated 0.24 g CO2 per page load
1.2 MB / 2.4 MB budget
1.2 MB transferred
55 requests
0.24 g CO2 per page load
JavaScript 555.9 KiB 47%
Fonts 339.2 KiB 29%
Images 119.5 KiB 10%
CSS 96.1 KiB 8%
Other 37.8 KiB 3%
HTML 32.0 KiB 3%
Other 5.1 KiB 0%
Other 2.5 KiB 0%
Other 1.1 KiB 0%
0 2.4 MB 4.9 MB
Under budget

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

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.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

B
Image Optimization
8 images, 0 KB saveable
REVIEW
8 images, 0 KB saveable
Warning::
https://consent.trustarc.com/asset/twilio2.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
8 images 120 KB
0 oversized -0 KB
6 legacy format
1 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

B
JS Execution Cost
558ms total JS execution
REVIEW
558ms total JS execution
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-PLD...: 165ms CPU time
Info::
https://www.authy.com/: 153ms CPU time
Info::
Unattributable: 109ms CPU time
Info::
https://consent.trustarc.com/asset/adv-bundle.js?v...: 75ms CPU time
Info::
https://assets.adobedtm.com/a62564f453ce/b1b9d7ec9...: 56ms CPU time
Warning::
Third-party scripts: 558ms (100% of total)

Main Thread Breakdown

Script Evaluation 48% Other 24% Style & Layout 14% Script Parsing & Compilation 6% Garbage Collection 3%
ScriptTotalScriptingParse/CompileParty
https://www.googletagmanager.com/gtm.js?id=GTM-PLD44Z165ms115ms11ms3rd
https://www.authy.com/153ms39ms2ms3rd
Unattributable109ms1ms0ms3rd
https://consent.trustarc.com/asset/adv-bundle.js?v=v1.7-172975ms49ms0ms3rd
https://assets.adobedtm.com/a62564f453ce/b1b9d7ec982b/launch-29605e749a31.min.js56ms42ms5ms3rd
C
JS Bundles
Action
26 scripts, 295 KB unused
REVIEW
26 scripts, 295 KB unused
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-PLD...: 83 KB unused (54%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.authy.com/etc.clientlibs/twilio-founda...: 47 KB unused (77%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://assets.adobedtm.com/a62564f453ce/b1b9d7ec9...: 42 KB unused (56%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.authy.com/etc.clientlibs/twilio-com/cl...: 27 KB unused (71%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.authy.com/etc.clientlibs/twilio-founda...: 25 KB unused (65%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 295 KB
295 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtm.js?id=GTM-PLD44Z155 KB83 KB (54%)✓3rd
https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-dynamic-modules/resources/5874.c1d494a1c6eb384691be.js62 KB47 KB (77%)✓3rd
https://assets.adobedtm.com/a62564f453ce/b1b9d7ec982b/launch-29605e749a31.min.js76 KB42 KB (56%)✓3rd
https://www.authy.com/etc.clientlibs/twilio-com/clientlibs/clientlib-site.lc-4750d7d000b27b3f16919e93029e86fe-lc.min.js39 KB27 KB (71%)✓3rd
https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-site.lc-3db62ef53f54b416f58022e27f60f2cf-lc.min.js0 KB25 KB (65%)✓3rd
https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-site.lc-3db62ef53f54b416f58022e27f60f2cf-lc.min.js39 KB25 KB (65%)✓3rd
https://www.authy.com/etc.clientlibs/clientlibs/granite/jquery.lc-7842899024219bcbdb5e72c946870b79-lc.min.js36 KB23 KB (65%)✓3rd
https://www.authy.com/etc.clientlibs/clientlibs/granite/jquery.lc-7842899024219bcbdb5e72c946870b79-lc.min.js0 KB23 KB (65%)✓3rd
https://www.authy.com/etc.clientlibs/twilio-com/clientlibs/clientlib-dependencies.lc-d41d8cd98f00b204e9800998ecf8427e-lc.min.js1 KB—✓3rd
https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-dynamic-modules/resources/4064.1be6bdd3b2f427b304f0.js12 KB—✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

B
Page Weight Inventory
55 resources · 1.2 MB · 295 KB savings available
REVIEW
55 resources · 1.2 MB · 295 KB savings available
Warning::
Page weight 165 KB over 1MB target
Got: 1.2 MB Expected: ≤ 1 MB
Info::
~295 KB of savings available
Warning::
54 third-party resources (100% of weight)
55 resources · 1.2 MiB · 54 third-party 165.2 KiB over 1MB target
JavaScript 50% · 595.9 KiB
Font 29% · 339.2 KiB
Image 10% · 122.6 KiB
CSS 8% · 96.1 KiB
Document 3% · 32.0 KiB
Other 0% · 3.5 KiB

~294.5 KiB of savings available

Remove unused JavaScript: 294.5 KiB
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
7 fonts (339 KB)
PASS
7 fonts (339 KB)
Info::
7 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

7

339 KB total

Render-blocking

0

of 7

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s FCP 1.2 s LCP 1.9 shttps://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-site/resources/a20a647d19af27011c7c.woff2a20a647d19af27011c7c.woff2 https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-site/resources/a20a647d19af27011c7c.woff2 — 72.7 KiB — 16 ms — font-display: swaphttps://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-site/resources/e408c138892b0f08a23d.woff2e408c138892b0f08a23d.woff2 https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-site/resources/e408c138892b0f08a23d.woff2 — 72.6 KiB — 17 ms — font-display: swaphttps://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-site/resources/ee7a891efcbc6ef61942.woff2ee7a891efcbc6ef61942.woff2 https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-site/resources/ee7a891efcbc6ef61942.woff2 — 73.9 KiB — 34 ms — font-display: swaphttps://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-site/resources/220e5b59f8588716f4d8.woff2220e5b59f8588716f4d8.woff2 https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-site/resources/220e5b59f8588716f4d8.woff2 — 74.0 KiB — 31 ms — font-display: swaphttps://consent.trustarc.com/get?name=Whitney-Light.otfget https://consent.trustarc.com/get?name=Whitney-Light.otf — 15.3 KiB — 3 ms — font-display: swaphttps://consent.trustarc.com/get?name=Whitney-Book.otfget https://consent.trustarc.com/get?name=Whitney-Book.otf — 15.5 KiB — 5 ms — font-display: swaphttps://consent.trustarc.com/get?name=Whitney-Medium.otfget https://consent.trustarc.com/get?name=Whitney-Medium.otf — 15.1 KiB — 3 ms — font-display: swap
a20a647d19af27011c7c.woff2 woff2 swap
Size 73 KB
Load time 16 ms
Start 318 ms
Risk FOUT — text flashes from fallback to web font
e408c138892b0f08a23d.woff2 woff2 swap
Size 73 KB
Load time 17 ms
Start 318 ms
Risk FOUT — text flashes from fallback to web font
ee7a891efcbc6ef61942.woff2 woff2 swap
Size 74 KB
Load time 34 ms
Start 319 ms
Risk FOUT — text flashes from fallback to web font
220e5b59f8588716f4d8.woff2 woff2 swap
Size 74 KB
Load time 31 ms
Start 320 ms
Risk FOUT — text flashes from fallback to web font
get otf swap
Size 15 KB
Load time 3 ms
Start 667 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
get otf swap
Size 16 KB
Load time 5 ms
Start 667 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
get otf swap
Size 15 KB
Load time 3 ms
Start 685 ms
Risk FOUT — text flashes from fallback to web font
  • 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 ~14 KB and ~28 ms

A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall
55 requests over 1830ms
INFO
0 ms 500 ms 1.0 s 1.5 s FCP 1.2 s LCP 1.9 shttps://authy.com// https://authy.com/ — 301 — 475 B — 82 ms — http/1.1https://www.authy.com/www.authy.com/ https://www.authy.com/ — 200 — 28.8 KiB — 109 ms — h2https://rum.hlx.page/.rum/@adobe/helix-rum-js@%5E2/dist/micro.jsrum.hlx.page/.rum/@adobe/helix-rum-... https://rum.hlx.page/.rum/@adobe/helix-rum-js@%5E2/dist/micro.js — 200 — 1.0 KiB — 53 ms — h2https://consent.trustarc.com/notice?domain=authy.com&c=teconsent&gtm=1&js=nj&noticeType=bbconsent.trustarc.com/notice?domain=... https://consent.trustarc.com/notice?domain=authy.com&c=teconsent&gtm=1&js=nj&noticeType=bb — 200 — 6.3 KiB — 75 ms — h2https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-dependencies.lc-d41d8cd98f00b204e9800998ecf8427e-lc.min.csswww.authy.com/etc.clientlibs/twilio... https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-dependencies.lc-d41d8cd98f00b204e9800998ecf8427e-lc.min.css — 200 — 558 B — 16 ms — h2https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-site.lc-a6f2c4a542fd58e3bc540c4adbde463b-lc.min.csswww.authy.com/etc.clientlibs/twilio... https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-site.lc-a6f2c4a542fd58e3bc540c4adbde463b-lc.min.css — 200 — 51.8 KiB — 36 ms — h2https://www.authy.com/etc.clientlibs/twilio-com/clientlibs/clientlib-dependencies.lc-d41d8cd98f00b204e9800998ecf8427e-lc.min.csswww.authy.com/etc.clientlibs/twilio... https://www.authy.com/etc.clientlibs/twilio-com/clientlibs/clientlib-dependencies.lc-d41d8cd98f00b204e9800998ecf8427e-lc.min.css — 200 — 559 B — 15 ms — h2https://www.authy.com/etc.clientlibs/twilio-com/clientlibs/clientlib-site.lc-613e6f743c6e4c8119fdc42a4f2e75f1-lc.min.csswww.authy.com/etc.clientlibs/twilio... https://www.authy.com/etc.clientlibs/twilio-com/clientlibs/clientlib-site.lc-613e6f743c6e4c8119fdc42a4f2e75f1-lc.min.css — 200 — 43.2 KiB — 38 ms — h2https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-dependencies.lc-d41d8cd98f00b204e9800998ecf8427e-lc.min.jswww.authy.com/etc.clientlibs/twilio... https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-dependencies.lc-d41d8cd98f00b204e9800998ecf8427e-lc.min.js — 200 — 570 B — 14 ms — h2https://www.authy.com/etc.clientlibs/clientlibs/granite/jquery.lc-7842899024219bcbdb5e72c946870b79-lc.min.jswww.authy.com/etc.clientlibs/client... https://www.authy.com/etc.clientlibs/clientlibs/granite/jquery.lc-7842899024219bcbdb5e72c946870b79-lc.min.js — 200 — 35.6 KiB — 33 ms — h2https://www.authy.com/etc.clientlibs/clientlibs/granite/utils.lc-e7bf340a353e643d198b25d0c8ccce47-lc.min.jswww.authy.com/etc.clientlibs/client... https://www.authy.com/etc.clientlibs/clientlibs/granite/utils.lc-e7bf340a353e643d198b25d0c8ccce47-lc.min.js — 200 — 4.0 KiB — 36 ms — h2https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-site.lc-3db62ef53f54b416f58022e27f60f2cf-lc.min.jswww.authy.com/etc.clientlibs/twilio... https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-site.lc-3db62ef53f54b416f58022e27f60f2cf-lc.min.js — 200 — 38.5 KiB — 34 ms — h2https://www.authy.com/etc.clientlibs/twilio-com/clientlibs/clientlib-dependencies.lc-d41d8cd98f00b204e9800998ecf8427e-lc.min.jswww.authy.com/etc.clientlibs/twilio... https://www.authy.com/etc.clientlibs/twilio-com/clientlibs/clientlib-dependencies.lc-d41d8cd98f00b204e9800998ecf8427e-lc.min.js — 200 — 568 B — 19 ms — h2https://www.authy.com/etc.clientlibs/twilio-com/clientlibs/clientlib-site.lc-4750d7d000b27b3f16919e93029e86fe-lc.min.jswww.authy.com/etc.clientlibs/twilio... https://www.authy.com/etc.clientlibs/twilio-com/clientlibs/clientlib-site.lc-4750d7d000b27b3f16919e93029e86fe-lc.min.js — 200 — 39.0 KiB — 36 ms — h2https://dev.visualwebsiteoptimizer.com/j.php?a=1176295&u=https%3A%2F%2Fwww.authy.com%2F&vn=2.2&ph=1&st=235.9000005722046&x=truedev.visualwebsiteoptimizer.com/j.ph... https://dev.visualwebsiteoptimizer.com/j.php?a=1176295&u=https%3A%2F%2Fwww.authy.com%2F&vn=2.2&ph=1&st=235.9000005722046&x=true — 200 — 1.7 KiB — 75 ms — h2https://www.authy.com/content/dam/twilio-com/core-assets/social/site.webmanifestwww.authy.com/content/dam/twilio-co... https://www.authy.com/content/dam/twilio-com/core-assets/social/site.webmanifest — 200 — 1.1 KiB — 14 ms — h2https://assets.adobedtm.com/a62564f453ce/b1b9d7ec982b/launch-29605e749a31.min.jsassets.adobedtm.com/a62564f453ce/b1... https://assets.adobedtm.com/a62564f453ce/b1b9d7ec982b/launch-29605e749a31.min.js — 200 — 75.5 KiB — 42 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-PLD44Zwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-PLD44Z — 200 — 154.6 KiB — 143 ms — h2https://www.authy.com/content/dam/authy/global/en/legacy/hero-home.jpg/_jcr_content/renditions/compressed-original.webpwww.authy.com/content/dam/authy/glo... https://www.authy.com/content/dam/authy/global/en/legacy/hero-home.jpg/_jcr_content/renditions/compressed-original.webp — 200 — 31.7 KiB — 7 ms — h2https://www.authy.com/content/dam/authy/global/en/legacy/maxresdefault.png/_jcr_content/renditions/compressed-original.webpwww.authy.com/content/dam/authy/glo... https://www.authy.com/content/dam/authy/global/en/legacy/maxresdefault.png/_jcr_content/renditions/compressed-original.webp — 200 — 58.2 KiB — 32 ms — h2https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-site/resources/a20a647d19af27011c7c.woff2www.authy.com/etc.clientlibs/twilio... https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-site/resources/a20a647d19af27011c7c.woff2 — 200 — 72.7 KiB — 16 ms — h2https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-site/resources/e408c138892b0f08a23d.woff2www.authy.com/etc.clientlibs/twilio... https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-site/resources/e408c138892b0f08a23d.woff2 — 200 — 72.6 KiB — 17 ms — h2https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-site/resources/ee7a891efcbc6ef61942.woff2www.authy.com/etc.clientlibs/twilio... https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-site/resources/ee7a891efcbc6ef61942.woff2 — 200 — 73.9 KiB — 34 ms — h2https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-site/resources/220e5b59f8588716f4d8.woff2www.authy.com/etc.clientlibs/twilio... https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-site/resources/220e5b59f8588716f4d8.woff2 — 200 — 74.0 KiB — 31 ms — h2https://www.authy.com/etc.clientlibs/clientlibs/granite/jquery.lc-7842899024219bcbdb5e72c946870b79-lc.min.jswww.authy.com/etc.clientlibs/client... https://www.authy.com/etc.clientlibs/clientlibs/granite/jquery.lc-7842899024219bcbdb5e72c946870b79-lc.min.js — 200 — 493 B — 29 ms — h2https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-dynamic-modules/resources/5874.c1d494a1c6eb384691be.jswww.authy.com/etc.clientlibs/twilio... https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-dynamic-modules/resources/5874.c1d494a1c6eb384691be.js — 200 — 61.6 KiB — 21 ms — h2https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-dynamic-modules/resources/2506.a86dc1892da07a9c4323.jswww.authy.com/etc.clientlibs/twilio... https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-dynamic-modules/resources/2506.a86dc1892da07a9c4323.js — 200 — 2.2 KiB — 29 ms — h2https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-dynamic-modules/resources/3755.c80faef32e8351b5f378.jswww.authy.com/etc.clientlibs/twilio... https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-dynamic-modules/resources/3755.c80faef32e8351b5f378.js — 200 — 2.6 KiB — 28 ms — h2https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-dynamic-modules/resources/9869.4df035ae9e86852e93f8.jswww.authy.com/etc.clientlibs/twilio... https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-dynamic-modules/resources/9869.4df035ae9e86852e93f8.js — 200 — 787 B — 28 ms — h2https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-dynamic-modules/resources/1613.ac907925dbbb05a56518.jswww.authy.com/etc.clientlibs/twilio... https://www.authy.com/etc.clientlibs/twilio-foundation/clientlibs/clientlib-dynamic-modules/resources/1613.ac907925dbbb05a56518.js — 200 — 1.5 KiB — 19 ms — h2
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HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 558ms · 337KB · €9/mo
Google Tag Manager
Tag Manager
Optional
Execution 165ms
Transfer 155 KB
Unused 54%
Monthly Cost €3/mo
www.authy.com
Other
Optional
Execution 153ms
Transfer 29 KB
Monthly Cost €2/mo
Unattributable
Other
Optional
Execution 109ms
Transfer 0 KB
Monthly Cost €2/mo
consent.trustarc.com
Other
Optional
Execution 75ms
Transfer 78 KB
Monthly Cost €1/mo
assets.adobedtm.com
Other
Optional
Execution 56ms
Transfer 76 KB
Unused 56%
Monthly Cost €1/mo

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

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

54% of Google Tag Manager's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

56% of assets.adobedtm.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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