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https://www.instagram.com

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
68
GRADE
D
FIX
4
REVIEW
2
PASS
6
INFO
2

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

Mobile Desktop
76
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
98
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
77
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
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.

1.01 s

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

3.51 s

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

119 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.

1.53 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.

3.53 s

Page Load Progression

510 ms
1.0 s
1.5 s
2.0 s
2.5 s
3.1 s
3.6 s
4.1 s
Checks
14
6 PASS 2 REVIEW 4 FIX
F
Page Weight Budget
Action
3.2 MB transferred, 47 requests
FIX
3.2 MB transferred, 47 requests
Warning::
Page weighs 12.5 MB (3.2 MB transferred)
Warning::
JavaScript is 2.2 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 2.2 MB
Info::
Fonts are 212 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 212 KB
Info::
47 HTTP requests
Info::
Estimated 0.67 g CO2 per page load
3.2 MB / 2.4 MB budget
3.2 MB transferred
47 requests
0.67 g CO2 per page load
JavaScript 2.2 MiB 68%
Images 569.3 KiB 17%
Fonts 211.6 KiB 6%
CSS 148.3 KiB 5%
HTML 121.8 KiB 4%
Other 6.6 KiB 0%
Other 1.4 KiB 0%
Other 607 B 0%
Other 227 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

D
Third-Party Impact
Action
96% third-party, 0 ms blocking
FIX
96% third-party, 0 ms blocking
Warning::
Third-party code accounts for 96% of page weight (3.1 MiB of 3.2 MiB)
Info::
Third-party blocking time is low (0 ms)
96%
First-party Third-party
F
JS Bundles
Action
31 scripts, 1.5 MB unused
FIX
31 scripts, 1.5 MB unused
Warning::
https://static.cdninstagram.com/rsrc.php/v4iDqw4/y...: 537 KB unused (74%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://static.cdninstagram.com/rsrc.php/v4iXCl4/y...: 352 KB unused (88%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://static.cdninstagram.com/rsrc.php/v4idqz4/y...: 219 KB unused (52%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://static.cdninstagram.com/rsrc.php/v4/yB/r/n...: 149 KB unused (94%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://static.cdninstagram.com/rsrc.php/v4idBq4/y...: 77 KB unused (100%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 1.5 MB
1576 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://static.cdninstagram.com/rsrc.php/v4iDqw4/yR/l/en_US/82perklV9DJBMu4qonYA1T2mqBBUHA2Fi8JriexMzqPrAaDuivcDRuKoKGVUPWEs-dqHn7WPVnsii2Un3tEbQ1Cawy6TOoSQVo_p4fn1Iw4pEdnAdTcUuKOIvspZdStSQuQoIzb-dcO57g8B2fZxBO4vmAxeEdcvYgHI_fEXKxzJbolx1DAKUoGsim5BSzYMNqp2HZxslnTDalIH_7hFx3Yi0Aq1LXlhXPQd0TcP-eMJu6WuEh_DQo6mNz8dfZ2Gu4dbtEj8UfWop6x9DjNMqplvxAOVB17ZML0akupg0kbF2CakavQ57mttmLnTYuasW1OSSeKLsX.js728 KB537 KB (74%)✓3rd
https://static.cdninstagram.com/rsrc.php/v4iXCl4/yB/l/en_US/ZSzYR14k9w9jLEwhnD36Ge6BQcE_IsJJsPYsQJs2DMgDGFI39NwSgLxVVBgXoGhzYn3zggH72LrtgAqWowacbfwv5s0eDmGqft6zrwlxJzwovgiFGHh9ozlMICLrCBvHMvU7duYgMnuCwTXhQ3eIbhY1l9nBLb-OhvDyE2k2Mw28D_gpvG2S0oRYw--Q7icxIyUiZk85ElNEPjABjXAqzp11_JpCmEnWJrIkZO1yB5KNx6PY3IJJDchOYIvRE-FZnFf2cMjHkLSd3HhguKe.js400 KB352 KB (88%)✓3rd
https://static.cdninstagram.com/rsrc.php/v4idqz4/yP/l/en_US/k_wk718FR3gDSW1P86M9RR5-cZF6wdyBhUbHRbbu77fG.js420 KB219 KB (52%)✓3rd
https://static.cdninstagram.com/rsrc.php/v4/yB/r/ny_ONvAlbQE.js159 KB149 KB (94%)✓3rd
https://static.cdninstagram.com/rsrc.php/v4idBq4/ye/l/en_US/rwXNf31RJQG.js77 KB77 KB (100%)✓3rd
https://static.cdninstagram.com/rsrc.php/v4/yu/r/u9HAKJpT99D.js60 KB58 KB (96%)✓3rd
https://static.cdninstagram.com/rsrc.php/v4/yR/r/Ve24ViYIrgR.js41 KB39 KB (96%)✓3rd
https://static.cdninstagram.com/rsrc.php/v4/ya/r/R1pEz0OuWy4.js74 KB35 KB (48%)✓3rd
https://static.cdninstagram.com/rsrc.php/v4/yr/r/H_AD9smLz73.js35 KB32 KB (93%)✓3rd
https://static.cdninstagram.com/rsrc.php/v4iija4/yQ/l/en_US/d4u9RG6sxvDWLEKM8Y4pNee4gHWvIx9STahM-zyPJc7Sh3zsi1CQIOP.js35 KB31 KB (90%)✓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

D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: private, no-cache, no-store, must-revalidate
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

private, no-cache, no-store, must-revalidate

DirectiveValueMeaning
private—Only browser cache, not CDN/proxy
no-cache—Cache but always revalidate first
no-store—Never cache this response
must-revalidate—Must recheck with server after expiry
C
JS Execution Cost
Action
1313ms total JS execution
REVIEW
1313ms total JS execution
Warning::
https://static.cdninstagram.com/rsrc.php/v4/ya/r/R...: 610ms CPU time
Info::
https://www.instagram.com/: 223ms CPU time
Info::
https://static.cdninstagram.com/rsrc.php/v4iDqw4/y...: 150ms CPU time
Info::
https://static.cdninstagram.com/rsrc.php/v4idqz4/y...: 145ms CPU time
Info::
Unattributable: 114ms CPU time
Warning::
Third-party scripts: 1089ms (83% of total)

Main Thread Breakdown

Script Evaluation 43% Script Parsing & Compilation 26% Other 16% Style & Layout 11%
ScriptTotalScriptingParse/CompileParty
https://static.cdninstagram.com/rsrc.php/v4/ya/r/R1pEz0OuWy4.js610ms537ms13ms3rd
https://www.instagram.com/223ms15ms0ms1st
https://static.cdninstagram.com/rsrc.php/v4iDqw4/yR/l/en_US/82perklV9DJBMu4qonYA1T2mqBBUHA2Fi8JriexMzqPrAaDuivcDRuKoKGVUPWEs-dqHn7WPVnsii2Un3tEbQ1Cawy6TOoSQVo_p4fn1Iw4pEdnAdTcUuKOIvspZdStSQuQoIzb-dcO57g8B2fZxBO4vmAxeEdcvYgHI_fEXKxzJbolx1DAKUoGsim5BSzYMNqp2HZxslnTDalIH_7hFx3Yi0Aq1LXlhXPQd0TcP-eMJu6WuEh_DQo6mNz8dfZ2Gu4dbtEj8UfWop6x9DjNMqplvxAOVB17ZML0akupg0kbF2CakavQ57mttmLnTYuasW1OSSeKLsX.js150ms21ms113ms3rd
https://static.cdninstagram.com/rsrc.php/v4idqz4/yP/l/en_US/k_wk718FR3gDSW1P86M9RR5-cZF6wdyBhUbHRbbu77fG.js145ms13ms67ms3rd
Unattributable114ms7ms0ms3rd
https://static.cdninstagram.com/rsrc.php/v4iXCl4/yB/l/en_US/ZSzYR14k9w9jLEwhnD36Ge6BQcE_IsJJsPYsQJs2DMgDGFI39NwSgLxVVBgXoGhzYn3zggH72LrtgAqWowacbfwv5s0eDmGqft6zrwlxJzwovgiFGHh9ozlMICLrCBvHMvU7duYgMnuCwTXhQ3eIbhY1l9nBLb-OhvDyE2k2Mw28D_gpvG2S0oRYw--Q7icxIyUiZk85ElNEPjABjXAqzp11_JpCmEnWJrIkZO1yB5KNx6PY3IJJDchOYIvRE-FZnFf2cMjHkLSd3HhguKe.js71ms5ms66ms3rd
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

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+
Image Optimization
4 images, 0 KB saveable
PASS
4 images, 0 KB saveable
Info::
All images are well-optimized
4 images 569 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+
Font Loading
2 fonts (212 KB)
PASS
2 fonts (212 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

212 KB total

Render-blocking

0

of 2

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s FCP 1.0 s LCP 3.5 shttps://static.cdninstagram.com/rsrc.php/y9/r/1GOXakOP6QP.woff21GOXakOP6QP.woff2 https://static.cdninstagram.com/rsrc.php/y9/r/1GOXakOP6QP.woff2 — 32.6 KiB — 0 ms — font-display: swaphttps://static.cdninstagram.com/rsrc.php/yQ/r/-pkMfchyeAZ.woff2-pkMfchyeAZ.woff2 https://static.cdninstagram.com/rsrc.php/yQ/r/-pkMfchyeAZ.woff2 — 179.1 KiB — 0 ms — font-display: swap
1GOXakOP6QP.woff2 woff2 swap
Size 33 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
-pkMfchyeAZ.woff2 woff2 swap
Size 179 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • 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 ~90 KB and ~180 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
Network Waterfall
47 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
83% of JavaScript execution is third-party
First-party Third-party 1089ms · 1622KB · $14/mo
static.cdninstagram.com
Other
Costly
Execution 610ms
Transfer 74 KB
Unused 48%
Monthly Cost $8/mo
static.cdninstagram.com
Other
Optional
Execution 150ms
Transfer 728 KB
Unused 74%
Monthly Cost $2/mo
static.cdninstagram.com
Other
Optional
Execution 145ms
Transfer 420 KB
Unused 52%
Monthly Cost $2/mo
Unattributable
Other
Optional
Execution 114ms
Transfer 0 KB
Monthly Cost $2/mo
static.cdninstagram.com
Other
Optional
Execution 71ms
Transfer 400 KB
Unused 88%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • static.cdninstagram.com adds 610ms and costs ~$8/month

83% 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

static.cdninstagram.com takes 610ms 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

74% of static.cdninstagram.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

52% of static.cdninstagram.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

88% of static.cdninstagram.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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