Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

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

Mobile Desktop

Performance

Accessibility

Best Practices

100

SEO

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

1.79 s

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

23.18 s

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

2.36 s

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

0.059

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

2.85 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.

23.29 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

6 PASS 1 REVIEW 5 FIX

Page Weight Budget

Action

3.7 MB transferred, 41 requests

FIX

3.7 MB transferred, 41 requests

Page weighs 14.3 MB (3.7 MB transferred)

JavaScript is 2.4 MB — consider code splitting or lazy loading

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

Got: 2.4 MB

41 HTTP requests

Estimated 0.78 g CO2 per page load

3.7 MB transferred

41 requests

0.78 g CO2 per page load

JavaScript 2.4 MiB 66%

Images 994.6 KiB 26%

CSS 151.9 KiB 4%

HTML 135.0 KiB 4%

Other 6.6 KiB 0%

Other 1.6 KiB 0%

Other 604 B 0%

Other 224 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

Third-Party Impact

Action

96% third-party, 0 ms blocking

FIX

96% third-party, 0 ms blocking

Third-party code accounts for 96% of page weight (3.6 MiB of 3.7 MiB)

Third-party blocking time is low (0 ms)

96%

First-party Third-party

JS Execution Cost

Action

5479ms total JS execution

FIX

5479ms total JS execution

https://static.cdninstagram.com/rsrc.php/v4/ya/r/R...: 2350ms CPU time

https://static.cdninstagram.com/rsrc.php/v4i53V4/y...: 656ms CPU time

https://www.instagram.com/: 631ms CPU time

https://static.cdninstagram.com/rsrc.php/v4ilPZ4/y...: 608ms CPU time

Unattributable: 404ms CPU time

Third-party scripts: 4848ms (88% of total)

Main Thread Breakdown

Script Evaluation 41% Script Parsing & Compilation 29% Other 15% Style & Layout 8%

Script	Total	Scripting	Parse/Compile	Party
https://static.cdninstagram.com/rsrc.php/v4/ya/r/R1pEz0OuWy4.js	2350ms	1987ms	60ms	3rd
https://static.cdninstagram.com/rsrc.php/v4i53V4/y_/l/en_US/UbHRbbu77fGjLEwhnD36Ge82perklV9DJBMu4qonYA1T2mqBBUHA2Fi8JriexMzqPrAaDuivcDRuKoKGVUPWEs-dqHn7WPVnsii2Un3tEbQ1Cawy6TOoSQVo_p4fn1Iw4pEdnAdTcUuKOIvIzb-dcO57g8B2fZxBO4vmAxeEdcvYgHI_fEXKxzJbolxY4WUnhUXRYJ1DAKUoGsim5BSzYMNqp2HZxslnTDalIH_zrwlxJzwovg7hFx3Yi0Aq1LXlhXPQd0TcdiTtvrA0TVf_vnwh3ABvYCP-eMJu6WuEh_DQo6mNz8dfZ2Gu4dbtEj8UfWop6x9DjN.js	656ms	90ms	516ms	3rd
https://www.instagram.com/	631ms	42ms	1ms	1st
https://static.cdninstagram.com/rsrc.php/v4ilPZ4/yP/l/en_US/k_wk718FR3gDSW1P86M9RR5-cZF6wdyBhhd1xsGqLJ-Gu9HAKJpT99D.js	608ms	35ms	317ms	3rd
Unattributable	404ms	32ms	0ms	3rd
data:text/javascript;base64,cmVxdWlyZUxhenkoWyJTZXJ2ZXJKU1BheWxvYWRMaXN0ZW5lciJdLGZ1bmN0aW9uKG0pe20ucHJvY2VzcygpO30sbnVsbCwweDEwMCk=	168ms	87ms	51ms	3rd
https://static.cdninstagram.com/rsrc.php/v4ikaU4/y1/l/en_US/7ZML0akupg0kbF2CakavQ57mttmLnTYuasW1OSSeKLsXl3kuim2Ho1EnMsrwMEgKXrIjWUAYuxuKcOVLE6s-6C-mv_RBelgxqkIBdCoY_9Rb-ZELF5Q86YaGWmese8PpaA6YB6ixXWdQ0fbf21YTJka9ta7odNDboPV5nE9o-nIlo3VbXAqzp11_JpC0Cklr7kx1h9ZIN72SS5MnTLAAXUtRnPF5ozoFpj-99G3-Qx8lcabVTDiA-aj-AFsO8JZCcc2ZP1Mqim_u89BurP8ZTFDSp4bWABAdmh5DEndjkKeHWrECl3_n2Jc9FVqcd252S-KrBJoNka.js	134ms	15ms	118ms	3rd
https://static.cdninstagram.com/rsrc.php/v4/yB/r/ny_ONvAlbQE.js	103ms	8ms	95ms	3rd
https://static.cdninstagram.com/rsrc.php/v4itz-4/y8/l/en_US/j3F-n2bpeEd.js	90ms	11ms	78ms	3rd
https://static.cdninstagram.com/rsrc.php/v4ipFP4/y0/l/en_US/VVBgXoGhzYn3zggH72LrtgrrCxjEFdRGjRvUGDWVbevhd4u9RG6sxvDgUuEsqlvNBGWLEKM8Y4pNee4gHWvIx9STBpfGEAcmRpYahM-zyPJc7SxM66rn6p61gH6f_7pAFRO249U1YTT9NT_v4bLhpa--wrwn4xePVEiNjRFkhtb7M-D5WBZZl3e5jjK.js	74ms	6ms	68ms	3rd

Showing top 10 of 14 scripts

JS Bundles

Action

30 scripts, 1.9 MB unused

FIX

30 scripts, 1.9 MB unused

https://static.cdninstagram.com/rsrc.php/v4i53V4/y...: 582 KB unused (72%)

Consider code splitting or tree shaking to reduce unused code.

https://static.cdninstagram.com/rsrc.php/v4ilPZ4/y...: 302 KB unused (62%)

Consider code splitting or tree shaking to reduce unused code.

https://static.cdninstagram.com/rsrc.php/v4/yB/r/n...: 149 KB unused (94%)

Consider code splitting or tree shaking to reduce unused code.

https://static.cdninstagram.com/rsrc.php/v4ipFP4/y...: 112 KB unused (93%)

Consider code splitting or tree shaking to reduce unused code.

https://static.cdninstagram.com/rsrc.php/v4itz-4/y...: 107 KB unused (88%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 1.9 MB

1932 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://static.cdninstagram.com/rsrc.php/v4i53V4/y_/l/en_US/UbHRbbu77fGjLEwhnD36Ge82perklV9DJBMu4qonYA1T2mqBBUHA2Fi8JriexMzqPrAaDuivcDRuKoKGVUPWEs-dqHn7WPVnsii2Un3tEbQ1Cawy6TOoSQVo_p4fn1Iw4pEdnAdTcUuKOIvIzb-dcO57g8B2fZxBO4vmAxeEdcvYgHI_fEXKxzJbolxY4WUnhUXRYJ1DAKUoGsim5BSzYMNqp2HZxslnTDalIH_zrwlxJzwovg7hFx3Yi0Aq1LXlhXPQd0TcdiTtvrA0TVf_vnwh3ABvYCP-eMJu6WuEh_DQo6mNz8dfZ2Gu4dbtEj8UfWop6x9DjN.js	811 KB	582 KB (72%)	✓	3rd
https://static.cdninstagram.com/rsrc.php/v4ilPZ4/yP/l/en_US/k_wk718FR3gDSW1P86M9RR5-cZF6wdyBhhd1xsGqLJ-Gu9HAKJpT99D.js	486 KB	302 KB (62%)	✓	3rd
https://static.cdninstagram.com/rsrc.php/v4/yB/r/ny_ONvAlbQE.js	159 KB	149 KB (94%)	✓	3rd
https://static.cdninstagram.com/rsrc.php/v4ipFP4/y0/l/en_US/VVBgXoGhzYn3zggH72LrtgrrCxjEFdRGjRvUGDWVbevhd4u9RG6sxvDgUuEsqlvNBGWLEKM8Y4pNee4gHWvIx9STBpfGEAcmRpYahM-zyPJc7SxM66rn6p61gH6f_7pAFRO249U1YTT9NT_v4bLhpa--wrwn4xePVEiNjRFkhtb7M-D5WBZZl3e5jjK.js	121 KB	112 KB (93%)	✓	3rd
https://static.cdninstagram.com/rsrc.php/v4itz-4/y8/l/en_US/j3F-n2bpeEd.js	122 KB	107 KB (88%)	✓	3rd
https://static.cdninstagram.com/rsrc.php/v4ieFP4/yG/l/en_US/spZdStSQuQoGZUyO6OuMq8fT6yKHnKvu1iFGHh9ozlMICLrCBvHMvU7JiOQdiiV_zzTMMsiJC02ez.js	112 KB	99 KB (89%)	✓	3rd
https://static.cdninstagram.com/rsrc.php/v4ikaU4/y1/l/en_US/7ZML0akupg0kbF2CakavQ57mttmLnTYuasW1OSSeKLsXl3kuim2Ho1EnMsrwMEgKXrIjWUAYuxuKcOVLE6s-6C-mv_RBelgxqkIBdCoY_9Rb-ZELF5Q86YaGWmese8PpaA6YB6ixXWdQ0fbf21YTJka9ta7odNDboPV5nE9o-nIlo3VbXAqzp11_JpC0Cklr7kx1h9ZIN72SS5MnTLAAXUtRnPF5ozoFpj-99G3-Qx8lcabVTDiA-aj-AFsO8JZCcc2ZP1Mqim_u89BurP8ZTFDSp4bWABAdmh5DEndjkKeHWrECl3_n2Jc9FVqcd252S-KrBJoNka.js	136 KB	99 KB (73%)	✓	3rd
https://static.cdninstagram.com/rsrc.php/v4idBq4/ye/l/en_US/rwXNf31RJQG.js	77 KB	77 KB (100%)	✓	3rd
https://static.cdninstagram.com/rsrc.php/v4/yf/r/GzNwqbjlXiu.js	78 KB	72 KB (92%)	✓	3rd
https://static.cdninstagram.com/rsrc.php/v4ie3F4/yj/l/en_US/bPBcfilPiNd.js	71 KB	64 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

HTTP Caching

Action

no-store (uncacheable)

FIX

no-store (uncacheable)

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

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

Directive	Value	Meaning
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

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

All text resources are properly compressed.

Image Optimization

4 images, 0 KB saveable

PASS

4 images, 0 KB saveable

https://static.cdninstagram.com/rsrc.php/yb/r/SxCW... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

4 images 995 KB

0 oversized -0 KB

1 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

A+

Font Loading

No web fonts (system fonts)

PASS

No web fonts (system fonts)

No web fonts loaded — system fonts are fastest

No web fonts loaded — system fonts are optimal.

A+

Resource Caching

All resources properly cached

PASS

All resources properly cached

No caching issues found

All static resources have appropriate caching headers.

A+

Critical Rendering Path

No render-blocking resources

PASS

No render-blocking resources

No render-blocking resources detected

A+

Resource Hints

17 hints, 0 missing preconnects

PASS

17 hints, 0 missing preconnects

Page uses 17 resource hint(s)

Current Resource Hints

preconnect

—

preload

dns-prefetch

—

prefetch

—

17 resource hints configured

Network Waterfall

41 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

88% of JavaScript execution is third-party

First-party Third-party 4848ms · 2322KB · $64/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
static.cdninstagram.com static.cdninstagram.com	Other	2350ms	74 KB	52%	$31/mo	Costly
static.cdninstagram.com static.cdninstagram.com	Other	656ms	811 KB	72%	$9/mo	Costly
static.cdninstagram.com static.cdninstagram.com	Other	608ms	486 KB	62%	$8/mo	Costly
Unattributable Unattributable	Other	404ms	0 KB	—	$5/mo	Costly
data:text/javascript;base64,cmVxdWlyZUxhenkoWyJTZXJ2ZXJKU1BheWxvYWRMaXN0ZW5lciJdLGZ1bmN0aW9uKG0pe20ucHJvY2VzcygpO30sbnVsbCwweDEwMCk= data:text/javascript;base64,cmVxdWlyZUxhenkoWyJTZXJ2ZXJKU1BheWxvYWRMaXN0ZW5lciJdLGZ1bmN0aW9uKG0pe20ucHJvY2VzcygpO30sbnVsbCwweDEwMCk=	Other	168ms	0 KB	—	$2/mo	Optional
static.cdninstagram.com static.cdninstagram.com	Other	134ms	136 KB	73%	$2/mo	Optional
static.cdninstagram.com static.cdninstagram.com	Other	103ms	159 KB	94%	$1/mo	Optional
static.cdninstagram.com static.cdninstagram.com	Other	90ms	122 KB	88%	$1/mo	Optional
static.cdninstagram.com static.cdninstagram.com	Other	74ms	121 KB	93%	$1/mo	Optional
static.cdninstagram.com static.cdninstagram.com	Other	74ms	152 KB	—	$1/mo	Optional
static.cdninstagram.com static.cdninstagram.com	Other	71ms	112 KB	89%	$1/mo	Optional
static.cdninstagram.com static.cdninstagram.com	Other	58ms	71 KB	90%	$1/mo	Optional
static.cdninstagram.com static.cdninstagram.com	Other	57ms	78 KB	92%	$1/mo	Optional

static.cdninstagram.com

Other

Costly

Execution 2350ms

Transfer 74 KB

Unused 52%

Monthly Cost $31/mo

static.cdninstagram.com

Other

Costly

Execution 656ms

Transfer 811 KB

Unused 72%

Monthly Cost $9/mo

static.cdninstagram.com

Other

Costly

Execution 608ms

Transfer 486 KB

Unused 62%

Monthly Cost $8/mo

Unattributable

Other

Costly

Execution 404ms

Transfer 0 KB

Monthly Cost $5/mo

data:text/javascript;base64,cmVxdWlyZUxhenkoWyJTZXJ2ZXJKU1BheWxvYWRMaXN0ZW5lciJdLGZ1bmN0aW9uKG0pe20ucHJvY2VzcygpO30sbnVsbCwweDEwMCk=

Other

Optional

Execution 168ms

Transfer 0 KB

Monthly Cost $2/mo

static.cdninstagram.com

Other

Optional

Execution 134ms

Transfer 136 KB

Unused 73%

Monthly Cost $2/mo

static.cdninstagram.com

Other

Optional

Execution 103ms

Transfer 159 KB

Unused 94%

Monthly Cost $1/mo

static.cdninstagram.com

Other

Optional

Execution 90ms

Transfer 122 KB

Unused 88%

Monthly Cost $1/mo

static.cdninstagram.com

Other

Optional

Execution 74ms

Transfer 121 KB

Unused 93%

Monthly Cost $1/mo

static.cdninstagram.com

Other

Optional

Execution 74ms

Transfer 152 KB

Monthly Cost $1/mo

static.cdninstagram.com

Other

Optional

Execution 71ms

Transfer 112 KB

Unused 89%

Monthly Cost $1/mo

static.cdninstagram.com

Other

Optional

Execution 58ms

Transfer 71 KB

Unused 90%

Monthly Cost $1/mo

static.cdninstagram.com

Other

Optional

Execution 57ms

Transfer 78 KB

Unused 92%

Monthly Cost $1/mo

These scripts may cost more than they're worth

static.cdninstagram.com adds 2350ms and costs ~$31/month
static.cdninstagram.com adds 656ms and costs ~$9/month
static.cdninstagram.com adds 608ms and costs ~$8/month
Unattributable adds 404ms and costs ~$5/month

88% 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 2350ms 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

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

static.cdninstagram.com takes 656ms 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

72% 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

static.cdninstagram.com takes 608ms 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

62% 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

Unattributable takes 404ms 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

73% 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

94% 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

93% 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

89% 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

90% 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

92% 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.