webpack.js.org

https://webpack.js.org/

Ranks Overall #1,686 Developer Tooling #76

Data from Oct 9, 2026, 10:15 AM UTC 3d old, older than this category's 3 days freshness target Measured every 2 days · 20 runs since Aug 27, 2026

Elsewhere: PageSpeed Insights · Calibre · Treo · CrUX Vis · Tame the Bots · Scoring Calculator · Wayback Machine

This data is 3d old.

Sites are measured on a rolling schedule, so figures here are the newest successful measurement rather than a reading taken just now. Comparisons against other sites may span different points in time.

Lab data is measured using Lighthouse, Mobile mode unless otherwise specified. Field data is reported from Chrome UX Report (using p75 measurements).

Stack

Uses React

Hosted by Vercel

Filmstrip LAB Throttled

How the page drew during the measured load, at 8 points across 21.86 s. Compare this filmstrip against another site.

2.16 s
5.46 s
8.20 s
10.93 s
13.66 s
16.39 s
19.13 s
21.86 s

Lighthouse Scores LAB Simulated

Performance

↓ -15 (-16.3%)

Accessibility

no change

100

Best Practices

no change

100

SEO

no change

Metrics LAB FIELD

Core Web Vitals: failing 3 of 3 assessed from real Chrome users.

Field figures are the p75 across real Chrome users over a 28-day trailing window (2026-09-10 → 2026-10-07), url-level.

Metric	Lab Simulated	Field
LCP CWV Largest Contentful Paint	4.02 s poor	↑ +1061 ms (+35.9%) significant 2.49 s – 6.43 s	2.00 s good	83.5% 10.4% 6.1%
INP CWV Interaction to Next Paint — field only, no lab run can measure it	n/a	—	212 ms needs work	72.7% 18.6% 8.7%
CLS CWV Cumulative Layout Shift	0.002 good	→ no change 0.002 – 0.002	0 good	88.7% 5% 6.3%
TBT Total Blocking Time	266 ms needs work	↑ +91 ms (+52%) 147 ms – 471 ms	n/a	—
FCP First Contentful Paint	2.93 s needs work	↑ +1226 ms (+71.9%) significant 1.71 s – 2.98 s	2.00 s needs work	72.4% 16.6% 11%
Speed Index	2.93 s good	↑ +1226 ms (+71.9%) significant 1.71 s – 2.98 s	n/a	—
TTFB Time to First Byte	615 ms good	↓ -11 ms (-1.8%) 608 ms – 669 ms	684 ms good	78.5% 15.5% 6%

Metric

Lab Simulated

Field

Value

Change / range

Trend

p75

Distribution

LCP CWV Largest Contentful Paint

4.02 s poor

↑ +1061 ms (+35.9%) significant 2.49 s – 6.43 s

2.00 s good

83.5% 10.4% 6.1%

INP CWV Interaction to Next Paint — field only, no lab run can measure it

n/a

—

212 ms needs work

72.7% 18.6% 8.7%

CLS CWV Cumulative Layout Shift

0.002 good

→ no change 0.002 – 0.002

0 good

88.7% 5% 6.3%

TBT Total Blocking Time

266 ms needs work

↑ +91 ms (+52%) 147 ms – 471 ms

n/a

—

FCP First Contentful Paint

2.93 s needs work

↑ +1226 ms (+71.9%) significant 1.71 s – 2.98 s

2.00 s needs work

72.4% 16.6% 11%

Speed Index

2.93 s good

↑ +1226 ms (+71.9%) significant 1.71 s – 2.98 s

n/a

—

TTFB Time to First Byte

615 ms good

↓ -11 ms (-1.8%) 608 ms – 669 ms

684 ms good

78.5% 15.5% 6%

LCP Subparts LAB Throttled

The subparts attribute LCP to your server, resource discovery, download, or rendering. They come from one throttled load, the same one as the filmstrip, so they add up to that load’s LCP rather than the simulated Lab LCP above.

element render delay 1.59 s

time to first byte 574 ms

LCP LAB Simulated vs LCP FIELD

Lab 4.02 s

Field p75 2.00 s

The lab LCP is 2.01× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric	Value	Change / range
Page Weight	791 kB	↑ +1.7 kB (+0.2%) 781 kB – 804 kB
Requests	23	→ no change 23 – 28
Third-party Weight	255 kB	↑ +1.7 kB (+0.7%) 248 kB – 255 kB
Third-party CPU	61 ms	↑ +14 ms (+29%) 43 ms – 70 ms
Unused JS	186 kB	↑ +1.7 kB (+1%) 183 kB – 201 kB
Unused CSS	0 B	→ no change 0 B – 0 B

Metric

Value

Change / range

Trend

Page Weight

791 kB

↑ +1.7 kB (+0.2%) 781 kB – 804 kB

Requests

→ no change 23 – 28

Third-party Weight

255 kB

↑ +1.7 kB (+0.7%) 248 kB – 255 kB

Third-party CPU

61 ms

↑ +14 ms (+29%) 43 ms – 70 ms

Unused JS

186 kB

↑ +1.7 kB (+1%) 183 kB – 201 kB

Unused CSS

0 B

→ no change 0 B – 0 B

By resource type

Type	Share	Size	Requests
script	74.1%	586 kB	5
image	9.8%	77.9 kB	7
font	9.2%	73.1 kB	4
stylesheet	3.2%	25.1 kB	3
other	2.2%	17.8 kB	3
document	1.4%	11.1 kB	1
Total		791 kB	23

Third parties 2 entities

Entity	Transfer	Size	Main thread Simulated
Google Tag Manager	script	180 kB	61 ms
Google Fonts	font	74.3 kB	0 ms
Total		255 kB	61 ms

Entity

Transfer

Size

Main thread Simulated

Google Tag Manager

script

180 kB

61 ms

Google Fonts

font

74.3 kB

0 ms

Total

255 kB

61 ms

Without JavaScript

The same load, photographed twice at 412×823: once with scripts disabled, once as rendered.

1% of pixels differ — they are nearly identical. A shifted layout counts as difference, so a <noscript> banner alone can account for a large figure.

Page health

Metric	Value	Change / range
Main Thread Work	1.59 s	↑ +136 ms (+9.3%) 1.36 s – 2.21 s
Long Tasks	8	↑ +1 (+14.3%) 6 – 10
DOM Elements	1,581	↓ -1149 (-42.1%) significant 1,498 – 2,730
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports)	34	→ no change 23 – 34
A11y Failures	3	→ no change 3 – 3
A11y Failing Nodes	7	→ no change 5 – 7

Metric

Value

Change / range

Trend

Main Thread Work

1.59 s

↑ +136 ms (+9.3%) 1.36 s – 2.21 s

Long Tasks

↑ +1 (+14.3%) 6 – 10

DOM Elements

1,581

↓ -1149 (-42.1%) significant 1,498 – 2,730

Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports)

→ no change 23 – 34

A11y Failures

→ no change 3 – 3

A11y Failing Nodes

→ no change 5 – 7

Main thread work

Task	Share	Duration Simulated
script evaluation	44%	696 ms
other	19%	307 ms
style layout	15%	242 ms
script parse compile	13%	211 ms
paint composite render	5%	73 ms
garbage collection	2%	32 ms
parse HTML	2%	25 ms
Total		1.59 s

Task

Time

Duration Simulated

script evaluation

44%

696 ms

other

19%

307 ms

style layout

15%

242 ms

script parse compile

13%

211 ms

paint composite render

73 ms

garbage collection

32 ms

parse HTML

25 ms

Total

1.59 s

Axe violations axe-core 4.13.0, full rule set

34 violating nodes across 4 rules, 2908 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

moderate region — All page content should be contained by landmarks 25 nodes

Offending elements (5 of 25)

.text-\[33\.178px\]

<h1 class="flex flex-wrap items-center justify-center text-white text-[33.178px] md:text-[39.813px] text-center font-[200] mt-[80px] md:mt-[90px] row-start-1 row-end-2">

h2:nth-child(1)

<h2><span id="install-webpack"></span>Install Webpack<a href="#install-webpack" aria-hidden="true" tabindex="-1"><span class="header-link"></span></a></h2>

.splash__wrap:nth-child(2) > .splash__install > .code-block-wrapper.mb-6.group > pre

<pre><code class="hljs language-bash"><span class="token function">npm</span> <span class="token function">install</span> --save-dev webpack webpack-cli</code></pre>

h2:nth-child(3)

<h2><span id="write-your-code"></span>Write Your Code<a href="#write-your-code" aria-hidden="true" tabindex="-1"><span class="header-link"></span></a></h2>

.splash__wrap:nth-child(4) > .splash__left > p
```
<p><strong>src/index.html</strong></p>
```

serious color-contrast — Elements must meet minimum color contrast ratio thresholds 5 nodes

Offending elements

p:nth-child(4) > strong > a

<a href="https://youtu.be/3Nv9muOkb6k?t=21293">Watch one here</a>

a[href$="getting-started"]

<a href="/guides/getting-started" data-discover="true">Get Started</a>

a[href$="concepts"]

<a href="/concepts" data-discover="true">Concepts</a>

p:nth-child(13) > a[href$="native-html/"][data-discover="true"]

<a href="/guides/native-html/" data-discover="true">Native HTML</a>

p:nth-child(13) > a[href$="native-css/"][data-discover="true"]

<a href="/guides/native-css/" data-discover="true">Native CSS</a>

serious scrollable-region-focusable — Scrollable region must have keyboard access 3 nodes
Offending elements
1. .splash__wrap:nth-child(4) > .splash__left > .code-block-wrapper.mb-6.group > pre
```
<pre>
```
2. .splash__wrap:nth-child(6) > .splash__left > .code-block-wrapper.mb-6.group > pre
```
<pre>
```
3. .splash__wrap:nth-child(6) > .splash__right > .code-block-wrapper.mb-6.group > pre
```
<pre>
```
moderate landmark-one-main — Document should have one main landmark 1 node
Offending element
1. html
```
<html lang="en" data-rh-managed="lang" data-theme="light">
```

Accessibility failures 3 of 21 audits

color-contrast — Background and foreground colors do not have a sufficient contrast ratio. 5 nodes
target-size — Touch targets do not have sufficient size or spacing. 1 node
landmark-one-main — Document does not have a main landmark. 1 node

Best Practices failures 1 of 19 audits

valid-source-maps — Missing source maps for large first-party JavaScript 2 items

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2

Measurement log

Field history 25 weeks

Weekly p75 from the CrUX History API, backfilled in a single request.

Week ending	LCP	INP	CLS	FCP	TTFB
2026-10-03	1.80 s	257 ms	0	1.75 s	614 ms
2026-09-26	1.84 s	277 ms	0.010	1.80 s	655 ms
2026-09-19	1.89 s	307 ms	0.020	1.97 s	677 ms
2026-09-12	1.88 s	307 ms	0.030	2.07 s	683 ms
2026-09-05	2.08 s	279 ms	0.030	2.13 s	699 ms
2026-08-29	2.12 s	348 ms	0.020	2.19 s	682 ms
2026-08-22	2.07 s	330 ms	0.010	2.15 s	682 ms
2026-08-15	2.06 s	330 ms	0	2.10 s	684 ms
2026-08-08	2.15 s	353 ms	0	2.16 s	764 ms
2026-08-01	2.06 s	269 ms	0	2.06 s	807 ms
2026-07-25	2.05 s	272 ms	0	2.06 s	903 ms
2026-07-18	2.13 s	278 ms	0	2.14 s	943 ms

Week ending

LCP

INP

CLS

FCP

TTFB

2026-10-03

1.80 s

257 ms

1.75 s

614 ms

2026-09-26

1.84 s

277 ms

0.010

1.80 s

655 ms

2026-09-19

1.89 s

307 ms

0.020

1.97 s

677 ms

2026-09-12

1.88 s

307 ms

0.030

2.07 s

683 ms

2026-09-05

2.08 s

279 ms

0.030

2.13 s

699 ms

2026-08-29

2.12 s

348 ms

0.020

2.19 s

682 ms

2026-08-22

2.07 s

330 ms

0.010

2.15 s

682 ms

2026-08-15

2.06 s

330 ms

2.10 s

684 ms

2026-08-08

2.15 s

353 ms

2.16 s

764 ms

2026-08-01

2.06 s

269 ms

2.06 s

807 ms

2026-07-25

2.05 s

272 ms

2.06 s

903 ms

2026-07-18

2.13 s

278 ms

2.14 s

943 ms

Runs

Every stored run for this URL, newest first.

When	Perf	LCP	CLS	TBT	Weight	Runs	Spread	Bench	Took	Archive
Oct 9, 2026, 10:15 AM UTC	77	4.02 s	0.002	266 ms	791 kB	3/3	±4	2,500 +1%	90.8s	Wayback
Oct 7, 2026, 2:09 AM UTC	92	2.96 s	0.002	175 ms	789 kB	3/3	±4	3,367 +35%	89.7s	Wayback
Oct 4, 2026, 4:38 AM UTC	89	2.98 s	0.002	242 ms	789 kB	3/3	±32	2,780 +12%	91.8s	Wayback
Oct 1, 2026, 8:10 PM UTC	90	2.50 s	0.002	294 ms	789 kB	3/3	±30	2,407 -3%	95.7s	Wayback
Sep 29, 2026, 5:48 PM UTC	88	2.49 s	0.002	373 ms	787 kB	3/3	±11	2,458 -1%	91.8s	Wayback
Sep 26, 2026, 6:26 PM UTC	75	4.02 s	0.002	317 ms	786 kB	3/3	±7	2,506 +1%	94.5s	Wayback
Sep 24, 2026, 7:17 AM UTC	76	3.99 s	0.002	286 ms	785 kB	3/3	±18	2,434 -2%	97.9s	Wayback
Sep 22, 2026, 3:37 AM UTC	69	6.37 s	0.002	187 ms	783 kB	3/3	±26	3,021 +21%	95.6s	Wayback
Sep 18, 2026, 11:11 PM UTC	76	4.01 s	0.002	288 ms	781 kB	3/3	±5	2,483 0%	93.6s	Wayback
Sep 16, 2026, 9:54 PM UTC	83	3.69 s	0.002	147 ms	782 kB	3/3	±31	3,003 +21%	88.2s	Wayback
Sep 14, 2026, 9:42 PM UTC	86	2.93 s	0.002	267 ms	781 kB	3/3	±5	2,321 -7%	98.3s	Wayback
Sep 12, 2026, 6:58 AM UTC	75	3.55 s	0.002	417 ms	804 kB	3/3	±7	2,499 0%	93.8s	Wayback
Sep 10, 2026, 5:40 AM UTC	89	3.13 s	0.002	208 ms	802 kB	3/3	±6	3,424 +38%	52.2s	Wayback
Sep 8, 2026, 12:57 AM UTC	78	3.54 s	0.002	343 ms	797 kB	3/3	±8	2,457 -1%	59.2s	Wayback
Sep 6, 2026, 12:40 AM UTC	73	3.58 s	0.002	471 ms	795 kB	3/3	±6	2,393 -4%	58.1s	Wayback
Sep 4, 2026, 10:46 AM UTC	78	3.55 s	0.002	345 ms	795 kB	3/3	±8	2,499 0%	59.5s	Wayback
Sep 3, 2026, 1:11 AM UTC	62	6.43 s	0.002	400 ms	796 kB	3/3	±30	2,440 -2%	61s	Wayback
Sep 1, 2026, 11:27 PM UTC	86	3.17 s	0.002	312 ms	796 kB	3/3	±29	3,100 +25%	51s	Wayback
Aug 31, 2026, 10:32 PM UTC	76	3.58 s	0.002	381 ms	797 kB	3/3	±1	2,489 0%	56.7s	Wayback
Aug 27, 2026, 7:01 PM UTC	77	3.54 s	0.002	373 ms	793 kB	3/3	±10	2,465 -1%	57.1s	Wayback

When

Scores

Perf

LCP

CLS

TBT

Weight

Runs

Spread

Bench

Took

Stack

Filmstrip LAB 🐢 Throttled

Lighthouse Scores LAB 🤖 Simulated

Metrics LAB FIELD

LCP Subparts LAB 🐢 Throttled

LCP LAB 🤖 Simulated vs LCP FIELD

Page weight

By resource type

Third parties 2 entities

Without JavaScript

Page health

Main thread work

Axe violations axe-core 4.13.0, full rule set

Accessibility failures 3 of 21 audits

Best Practices failures 1 of 19 audits

Hygiene

Measurement log

Field history 25 weeks

Runs

Filmstrip LAB Throttled

Lighthouse Scores LAB Simulated

LCP Subparts LAB Throttled

LCP LAB Simulated vs LCP FIELD