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https://www.twosigma.com

Performance

· 16 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
75
GRADE
C
FIX
3
REVIEW
1
PASS
10
INFO
2

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

Mobile Desktop
51
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
89
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
81
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.

9.67 s

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

13.21 s

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

178 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.104

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

9.67 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.

13.58 s

Page Load Progression

811 ms
1.6 s
2.4 s
3.2 s
4.1 s
4.9 s
5.7 s
6.5 s
Checks
16
10 PASS 1 REVIEW 3 FIX
F
Page Weight Budget
Action
10.6 MB transferred, 71 requests
FIX
10.6 MB transferred, 71 requests
Critical::
Page weighs 21.1 MB (10.6 MB transferred)
Warning::
JavaScript is 1.1 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.1 MB
Info::
Fonts are 512 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 512 KB
Info::
71 HTTP requests
Info::
Estimated 2.2 g CO2 per page load
10.6 MB / 2.4 MB budget
10.6 MB transferred
71 requests
2.2 g CO2 per page load
Other 8.5 MiB 80%
JavaScript 1.1 MiB 11%
Fonts 512.4 KiB 5%
Images 358.1 KiB 3%
CSS 97.3 KiB 1%
HTML 43.4 KiB 0%
Other 2.8 KiB 0%
Other 1.8 KiB 0%
Other 16 B 0%
0 2.4 MB 4.9 MB
Over 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

F
JS Execution Cost
Action
13047ms total JS execution
FIX
13047ms total JS execution
Warning::
https://www.twosigma.com/: 9508ms CPU time
Warning::
Unattributable: 1259ms CPU time
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 1193ms CPU time
Warning::
https://www.twosigma.com/wp-content/themes/tsmb/as...: 708ms CPU time
Info::
https://www.twosigma.com/cdn-cgi/challenge-platfor...: 218ms CPU time
Info::
Third-party scripts: 2548ms (20% of total)

Main Thread Breakdown

Style & Layout 69% Script Evaluation 14% Other 13%
ScriptTotalScriptingParse/CompileParty
https://www.twosigma.com/9508ms37ms4ms1st
Unattributable1259ms23ms0ms3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js1193ms1044ms81ms3rd
https://www.twosigma.com/wp-content/themes/tsmb/assets/public/build/home-scripts.min.js?ver=2.09708ms319ms90ms1st
https://www.twosigma.com/cdn-cgi/challenge-platform/scripts/jsd/main.js218ms208ms2ms1st
https://www.googletagmanager.com/gtag/js?id=UA-1613156-196ms64ms31ms3rd
https://www.twosigma.com/wp-includes/js/jquery/jquery.min.js?ver=3.7.164ms39ms8ms1st
F
JS Bundles
Action
20 scripts, 712 KB unused
FIX
20 scripts, 712 KB unused
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 161 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 161 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 161 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.twosigma.com/wp-content/themes/tsmb/as...: 132 KB unused (64%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=UA-161...: 75 KB unused (65%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 712 KB
712 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js0 KB161 KB (44%)✓3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js363 KB161 KB (44%)✓3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js363 KB161 KB (44%)✓3rd
https://www.twosigma.com/wp-content/themes/tsmb/assets/public/build/home-scripts.min.js?ver=2.09206 KB132 KB (64%)✓1st
https://www.googletagmanager.com/gtag/js?id=UA-1613156-1116 KB75 KB (65%)✓3rd
https://www.twosigma.com/wp-includes/js/jquery/jquery.min.js?ver=3.7.131 KB20 KB (65%)✓1st
https://www.google.com/recaptcha/api.js?render=6Lc0198ZAAAAAD5EhsOjjewxbB8aJI0ICIwtQuDc&ver=3.01 KB—✓3rd
https://www.twosigma.com/wp-includes/js/dist/i18n.min.js?ver=c26c3dc7bed3667933752 KB—✓1st
https://www.twosigma.com/wp-content/themes/tsmb/js/ajaxPosts.js?ver=2.092 KB—✓1st
https://www.twosigma.com/wp-content/plugins/cf7-conditional-fields/js/scripts.js?ver=2.6.69 KB—✗1st

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

C
Image Optimization
Action
15 images, 0 KB saveable
REVIEW
15 images, 0 KB saveable
Warning::
https://www.twosigma.com/wp-content/themes/tsmb/as... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.twosigma.com/wp-content/uploads/2025/1... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.twosigma.com/wp-content/themes/tsmb/as... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.twosigma.com/wp-content/themes/tsmb/as... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.twosigma.com/wp-content/uploads/2026/0... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.twosigma.com/wp-content/uploads/2025/1... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.twosigma.com/wp-content/themes/tsmb/as... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
15 images 358 KB
0 oversized -0 KB
14 legacy format
7 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

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

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

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

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

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

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

A+
Third-Party Impact
8% third-party, 0 ms blocking
PASS
8% third-party, 0 ms blocking
Info::
Third-party code accounts for 8% of page weight (915.8 KiB of 10.6 MiB)
Info::
Third-party blocking time is low (0 ms)
92%
First-party Third-party
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
4 fonts (512 KB)
PASS
4 fonts (512 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

512 KB total

Render-blocking

0

of 4

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 9.7 s LCP 13.2 shttps://www.twosigma.com/wp-content/themes/tsmb/assets/public/fonts/tt_commons_demibold.otftt_commons_demibold.otf https://www.twosigma.com/wp-content/themes/tsmb/assets/public/fonts/tt_commons_demibold.otf — 130.8 KiB — 0 ms — font-display: swaphttps://www.twosigma.com/wp-content/themes/tsmb/assets/public/fonts/tt_commons_light.otftt_commons_light.otf https://www.twosigma.com/wp-content/themes/tsmb/assets/public/fonts/tt_commons_light.otf — 127.3 KiB — 0 ms — font-display: swaphttps://www.twosigma.com/wp-content/themes/tsmb/assets/public/fonts/tt_commons_thin.otftt_commons_thin.otf https://www.twosigma.com/wp-content/themes/tsmb/assets/public/fonts/tt_commons_thin.otf — 127.3 KiB — 0 ms — font-display: swaphttps://www.twosigma.com/wp-content/themes/tsmb/assets/public/fonts/tt_commons_medium.otftt_commons_medium.otf https://www.twosigma.com/wp-content/themes/tsmb/assets/public/fonts/tt_commons_medium.otf — 127.0 KiB — 0 ms — font-display: swap
tt_commons_demibold.otf otf swap
Size 131 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • 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
tt_commons_light.otf otf swap
Size 127 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • 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
tt_commons_thin.otf otf swap
Size 127 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • 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
tt_commons_medium.otf otf swap
Size 127 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • 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
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 ~410 KB and ~820 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+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Google Cloud

A+
HTTP Caching
max-age=600 (10 minutes)
PASS
max-age=600 (10 minutes)
Info::
Cache-Control header is set
Got: max-age=600, must-revalidate
Info::
Effective TTL: 10 minutes (max-age=600)
Info::
Last-Modified header present
Cache-Control

max-age=600, must-revalidate

DirectiveValueMeaning
max-age600Cache for 10 minutes
must-revalidate—Must recheck with server after expiry
Effective TTL: 600 seconds
Network Waterfall
71 requests over 0ms
INFO

Performance analysis not available for this result.

Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
20% of JavaScript execution is third-party
First-party Third-party 2548ms · 116KB · $34/mo
Unattributable
Other
Costly
Execution 1259ms
Transfer 0 KB
Monthly Cost $17/mo
www.gstatic.com
Other
Costly
Execution 1193ms
Transfer 0 KB
Unused 44%
Monthly Cost $16/mo
Google Tag Manager
Tag Manager
Optional
Execution 96ms
Transfer 116 KB
Unused 65%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • Unattributable adds 1259ms and costs ~$17/month
  • www.gstatic.com adds 1193ms and costs ~$16/month

Unattributable takes 1259ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

www.gstatic.com takes 1193ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

65% 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

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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