e18e
@e18e.dev
https://e18e.dev (Ecosystem Performance) is a community initiative to bring together people who are passionate about improving performance in the JS ecosystem. Get involved at https://chat.e18e.dev π
Pinned
π
e18e community starter pack
go.bsky.app/JoSyk5A
go.bsky.app/JoSyk5A
Reposted by e18e
new release of the @e18e.dev github action for diffing dependency changes
it'll now more cleanly show changes in dependency size
it'll now more cleanly show changes in dependency size
GitHub - e18e/action-dependency-diff: A GitHub action to report dependency changes and potential problems
A GitHub action to report dependency changes and potential problems - e18e/action-dependency-diff
github.com
January 11, 2026 at 9:46 PM
new release of the @e18e.dev github action for diffing dependency changes
it'll now more cleanly show changes in dependency size
it'll now more cleanly show changes in dependency size
Reposted by e18e
βοΈ Woke up to 200 contributors and 5M downloads/week for Knip π₯Ή
THANK YOU β€οΈ
Also, v5.80.2 is out. Changelog: added β¨ and β€οΈβπ₯ to cut your code to perfection πͺ
THANK YOU β€οΈ
Also, v5.80.2 is out. Changelog: added β¨ and β€οΈβπ₯ to cut your code to perfection πͺ
January 9, 2026 at 7:27 AM
βοΈ Woke up to 200 contributors and 5M downloads/week for Knip π₯Ή
THANK YOU β€οΈ
Also, v5.80.2 is out. Changelog: added β¨ and β€οΈβπ₯ to cut your code to perfection πͺ
THANK YOU β€οΈ
Also, v5.80.2 is out. Changelog: added β¨ and β€οΈβπ₯ to cut your code to perfection πͺ
Reposted by e18e
My astro pr landed! π
11x speed up in rendering in some cases it seems π
Was nice to delve into a repo I haven't touched for a while too!
11x speed up in rendering in some cases it seems π
Was nice to delve into a repo I haven't touched for a while too!
github.com
January 7, 2026 at 3:54 PM
My astro pr landed! π
11x speed up in rendering in some cases it seems π
Was nice to delve into a repo I haven't touched for a while too!
11x speed up in rendering in some cases it seems π
Was nice to delve into a repo I haven't touched for a while too!
Reposted by e18e
If youβve wondered what changed to make Storybook faster, this weekβs @devtools.fm episode is a great breakdown. @reinhold.is (Storybook core maintainer) covers Vite, ESM, fewer dependencies β impacts CSF, framework support, vitest. Plus, AI/LLMs via MCP.
π§ Link in comments π
π§ Link in comments π
January 6, 2026 at 6:17 PM
If youβve wondered what changed to make Storybook faster, this weekβs @devtools.fm episode is a great breakdown. @reinhold.is (Storybook core maintainer) covers Vite, ESM, fewer dependencies β impacts CSF, framework support, vitest. Plus, AI/LLMs via MCP.
π§ Link in comments π
π§ Link in comments π
Reposted by e18e
time to get back into everything!
if you know of a tool or library you use which has perf issues, please do nerdsnipe me π
if you know of a tool or library you use which has perf issues, please do nerdsnipe me π
January 5, 2026 at 4:51 PM
time to get back into everything!
if you know of a tool or library you use which has perf issues, please do nerdsnipe me π
if you know of a tool or library you use which has perf issues, please do nerdsnipe me π
Reposted by e18e
I just published a new small and focused frontmatter parser. I feel like existing ones are too outdated and/or try to do too much.
GitHub - remcohaszing/simplematter: A simple frontmatter parser
A simple frontmatter parser. Contribute to remcohaszing/simplematter development by creating an account on GitHub.
github.com
January 2, 2026 at 12:38 PM
I just published a new small and focused frontmatter parser. I feel like existing ones are too outdated and/or try to do too much.
Reposted by e18e
βοΈ Knip v5.79.0 is out
No less than 3οΈβ£ plugins have been contributed by the great @alexanderkaran.bsky.social:
β Knex
β TanStack Start
β VitePress
Also, there's proper support for git worktrees + a ton of improvements by other great contributors β€οΈ
β github.com/webpro-nl/kn...
β knip.dev
No less than 3οΈβ£ plugins have been contributed by the great @alexanderkaran.bsky.social:
β Knex
β TanStack Start
β VitePress
Also, there's proper support for git worktrees + a ton of improvements by other great contributors β€οΈ
β github.com/webpro-nl/kn...
β knip.dev
January 2, 2026 at 7:38 AM
βοΈ Knip v5.79.0 is out
No less than 3οΈβ£ plugins have been contributed by the great @alexanderkaran.bsky.social:
β Knex
β TanStack Start
β VitePress
Also, there's proper support for git worktrees + a ton of improvements by other great contributors β€οΈ
β github.com/webpro-nl/kn...
β knip.dev
No less than 3οΈβ£ plugins have been contributed by the great @alexanderkaran.bsky.social:
β Knex
β TanStack Start
β VitePress
Also, there's proper support for git worktrees + a ton of improvements by other great contributors β€οΈ
β github.com/webpro-nl/kn...
β knip.dev
Reposted by e18e
we released the new @e18e.dev ESLint plugin today! π
this comes with 3 categories of rules: modernisation, performance, replacements
it also works with oxlint and most of the rules have auto-fixes π οΈ
try it out and let us know any feedback/rule suggestions in discord/bsky/github!
this comes with 3 categories of rules: modernisation, performance, replacements
it also works with oxlint and most of the rules have auto-fixes π οΈ
try it out and let us know any feedback/rule suggestions in discord/bsky/github!
GitHub - e18e/eslint-plugin: The official e18e ESLint plugin for code modernization and performance best practices
The official e18e ESLint plugin for code modernization and performance best practices - e18e/eslint-plugin
github.com
December 19, 2025 at 7:44 PM
we released the new @e18e.dev ESLint plugin today! π
this comes with 3 categories of rules: modernisation, performance, replacements
it also works with oxlint and most of the rules have auto-fixes π οΈ
try it out and let us know any feedback/rule suggestions in discord/bsky/github!
this comes with 3 categories of rules: modernisation, performance, replacements
it also works with oxlint and most of the rules have auto-fixes π οΈ
try it out and let us know any feedback/rule suggestions in discord/bsky/github!
Reposted by e18e
fast-equals went from 280KB to 100KB in the last release! π
we still use dequal in most places but this is handy for where you need to compare more complex values
we still use dequal in most places but this is handy for where you need to compare more complex values
December 19, 2025 at 4:08 PM
fast-equals went from 280KB to 100KB in the last release! π
we still use dequal in most places but this is handy for where you need to compare more complex values
we still use dequal in most places but this is handy for where you need to compare more complex values
Reposted by e18e
Eleventy Core Dependency Watch (2025 Edition)
www.11ty.dev/blog/depende...
v4.0.0.alpha.6 (compared with v3) reduces:
1οΈβ£ dependencies 21.6%
2οΈβ£ 3rd-party dependencies 27.6%
3οΈβ£ node_modules weight 33.3%
www.11ty.dev/blog/depende...
v4.0.0.alpha.6 (compared with v3) reduces:
1οΈβ£ dependencies 21.6%
2οΈβ£ 3rd-party dependencies 27.6%
3οΈβ£ node_modules weight 33.3%
Eleventy Core Dependency Watch (2025 Edition)
An Eleventy blog post published on December 2025.
www.11ty.dev
December 12, 2025 at 4:50 PM
Eleventy Core Dependency Watch (2025 Edition)
www.11ty.dev/blog/depende...
v4.0.0.alpha.6 (compared with v3) reduces:
1οΈβ£ dependencies 21.6%
2οΈβ£ 3rd-party dependencies 27.6%
3οΈβ£ node_modules weight 33.3%
www.11ty.dev/blog/depende...
v4.0.0.alpha.6 (compared with v3) reduces:
1οΈβ£ dependencies 21.6%
2οΈβ£ 3rd-party dependencies 27.6%
3οΈβ£ node_modules weight 33.3%
Reposted by e18e
`unicode-segmenter/grapheme` (alternative to Intl.Segmenter and graphemer) is now only 3.4KB mingzipped.
github.com/cometkim/uni...
github.com/cometkim/uni...
Release [email protected] Β· cometkim/unicode-segmenter
Patch Changes
65c38ce: Move GB9c rule checking to be after the main boundary checking.
To try to avoid unnecessary work as much as possible.
No noticeable changes, but perf seems to be improved b...
github.com
December 14, 2025 at 10:20 PM
`unicode-segmenter/grapheme` (alternative to Intl.Segmenter and graphemer) is now only 3.4KB mingzipped.
github.com/cometkim/uni...
github.com/cometkim/uni...
Reposted by e18e
In the process of upgrading the release script I also migrated it to TS, replaced minimist with native parseArgs, globby with native glob and p-series with a for loop (that was long overdue)
December 11, 2025 at 8:32 PM
In the process of upgrading the release script I also migrated it to TS, replaced minimist with native parseArgs, globby with native glob and p-series with a for loop (that was long overdue)
Reposted by e18e
Hello friends and welcome to a new βHow is ESM vs CJS going!β 33.4% of the popular packages on npm now includes ESM. Up from 29.6% half a year ago. We have a third!
ESM-only is up from 11.5% to 12.6%.
This is also the impact of half a year of Node 18 being EOL, making `require(esm)` available
ESM-only is up from 11.5% to 12.6%.
This is also the impact of half a year of Node 18 being EOL, making `require(esm)` available
December 4, 2025 at 8:31 PM
Hello friends and welcome to a new βHow is ESM vs CJS going!β 33.4% of the popular packages on npm now includes ESM. Up from 29.6% half a year ago. We have a third!
ESM-only is up from 11.5% to 12.6%.
This is also the impact of half a year of Node 18 being EOL, making `require(esm)` available
ESM-only is up from 11.5% to 12.6%.
This is also the impact of half a year of Node 18 being EOL, making `require(esm)` available
Reposted by e18e
Was debugging a nasty ESM issue and ended up optimizing unjs/πΌοΈIPX from 99 dependencies down to 6 (26 MB β 2 MB).
Available in the v4 nightly builds with the same features as before!
Available in the v4 nightly builds with the same features as before!
December 4, 2025 at 7:38 PM
Was debugging a nasty ESM issue and ended up optimizing unjs/πΌοΈIPX from 99 dependencies down to 6 (26 MB β 2 MB).
Available in the v4 nightly builds with the same features as before!
Available in the v4 nightly builds with the same features as before!
Reposted by e18e
we're trying to come up with some good lint rules for performant syntax. if you have any ideas, let us know in the issue!
ideally things which are provably faster or more efficient with memory across all engines
ideally things which are provably faster or more efficient with memory across all engines
Performance rules (round 1) Β· Issue #2 Β· e18e/eslint-plugin
We don't yet have any performance rules, so let's use this issue to track ideas. We're looking for syntax replacements of {slow syntax} -> {fast syntax}. NOTE, this isn't only about CPU perf, we sh...
github.com
December 3, 2025 at 1:25 PM
we're trying to come up with some good lint rules for performant syntax. if you have any ideas, let us know in the issue!
ideally things which are provably faster or more efficient with memory across all engines
ideally things which are provably faster or more efficient with memory across all engines
Reposted by e18e
New @e18e.dev MCP server doing it's best to keep your dependencies slim and well maintained and keep the LLMs in check.
No more installing bloated dependencies π§‘
Obviously built with tmcp π
No more installing bloated dependencies π§‘
Obviously built with tmcp π
the new @e18e.dev MCP server is here!
this will advise agents on modern and performant best practices going forward. this is increasingly important, especially to help reduce "AI slop" and emit of outdated/legacy code
big thanks to @paolo.ricciuti.me who is leading this π
this will advise agents on modern and performant best practices going forward. this is increasingly important, especially to help reduce "AI slop" and emit of outdated/legacy code
big thanks to @paolo.ricciuti.me who is leading this π
GitHub - e18e/mcp: The official e18e MCP server
The official e18e MCP server. Contribute to e18e/mcp development by creating an account on GitHub.
github.com
December 1, 2025 at 1:30 PM
New @e18e.dev MCP server doing it's best to keep your dependencies slim and well maintained and keep the LLMs in check.
No more installing bloated dependencies π§‘
Obviously built with tmcp π
No more installing bloated dependencies π§‘
Obviously built with tmcp π
Reposted by e18e
churned out a bunch more codemods π
we'll add tooling around these ultimately but you can programmatically use them today.
each one is a modernisation codemod, in that it migrates from older syntax to new
we'll add tooling around these ultimately but you can programmatically use them today.
each one is a modernisation codemod, in that it migrates from older syntax to new
GitHub - e18e/web-features-codemods: A collection of codemods for migrating to standard web features
A collection of codemods for migrating to standard web features - e18e/web-features-codemods
github.com
November 29, 2025 at 6:59 PM
churned out a bunch more codemods π
we'll add tooling around these ultimately but you can programmatically use them today.
each one is a modernisation codemod, in that it migrates from older syntax to new
we'll add tooling around these ultimately but you can programmatically use them today.
each one is a modernisation codemod, in that it migrates from older syntax to new
Reposted by e18e
Thanks so much to those of you who reached out about helping lead some of the e18e projects π lots of progress already being made!
November 29, 2025 at 1:48 PM
Thanks so much to those of you who reached out about helping lead some of the e18e projects π lots of progress already being made!
Reposted by e18e
π Knip for Editors
Trust me, I've poured in A Ton of Love βοΈ
This isn't just a plugin to show unused exports. It offers a unique way to view & navigate your code and connect the dots. Feels like there's so much potential here.
Excited for you to try out the preview! π
β github.com/webpro-nl/kn...
Trust me, I've poured in A Ton of Love βοΈ
This isn't just a plugin to show unused exports. It offers a unique way to view & navigate your code and connect the dots. Feels like there's so much potential here.
Excited for you to try out the preview! π
β github.com/webpro-nl/kn...
November 28, 2025 at 1:50 PM
π Knip for Editors
Trust me, I've poured in A Ton of Love βοΈ
This isn't just a plugin to show unused exports. It offers a unique way to view & navigate your code and connect the dots. Feels like there's so much potential here.
Excited for you to try out the preview! π
β github.com/webpro-nl/kn...
Trust me, I've poured in A Ton of Love βοΈ
This isn't just a plugin to show unused exports. It offers a unique way to view & navigate your code and connect the dots. Feels like there's so much potential here.
Excited for you to try out the preview! π
β github.com/webpro-nl/kn...
Reposted by e18e
Thankful to the amazing unsung heroes of open source development doing great work like @cyberalien.dev
Check out how much smaller `@iconify/tailwind4` has gotten with the latest release!
Check out how much smaller `@iconify/tailwind4` has gotten with the latest release!
November 28, 2025 at 1:21 AM
Thankful to the amazing unsung heroes of open source development doing great work like @cyberalien.dev
Check out how much smaller `@iconify/tailwind4` has gotten with the latest release!
Check out how much smaller `@iconify/tailwind4` has gotten with the latest release!
Reposted by e18e
chokidar 5 published π
now ESM only! 185KB -> 105KB install size
now ESM only! 185KB -> 105KB install size
Release 5.0.0 Β· paulmillr/chokidar
Make the package ESM-only. Reduces on-disk package size from ~150kb to ~80kb
Increase minimum node.js version to v20.19. The versions starting from it support loading esm files from cjs
fix: Make t...
github.com
November 26, 2025 at 9:53 AM
chokidar 5 published π
now ESM only! 185KB -> 105KB install size
now ESM only! 185KB -> 105KB install size
Reposted by e18e
we've started tracking the ongoing and upcoming projects better on the e18e site
hopefully this gives a better idea of the things we're building!
hopefully this gives a better idea of the things we're building!
e18e
A list of ongoing and upcoming projects by the e18e community.
e18e.dev
November 25, 2025 at 11:39 AM
we've started tracking the ongoing and upcoming projects better on the e18e site
hopefully this gives a better idea of the things we're building!
hopefully this gives a better idea of the things we're building!
Reposted by e18e
With the next release of typescript-eslint, you will be able to setup a new SvelteKit project with every single integration it offers and fast-glob will be nowhere in your dependency tree! Removes over a dozen dependencies like is-number!!
github.com/typescript-e...
github.com/typescript-e...
feat(typescript-estree): replace fast-glob with tinyglobby by benmccann Β· Pull Request #11740 Β· typescript-eslint/typescript-eslint
PR Checklist
Addresses an existing open issue: fixes Enhancement: replace fast-glob with tinyglobbyΒ #10533
That issue was marked as accepting prs
Steps in Contributing were taken
Overview
Repl...
github.com
November 24, 2025 at 5:01 PM
With the next release of typescript-eslint, you will be able to setup a new SvelteKit project with every single integration it offers and fast-glob will be nowhere in your dependency tree! Removes over a dozen dependencies like is-number!!
github.com/typescript-e...
github.com/typescript-e...
Reposted by e18e
_Very_ excited to announce that @mweststrate.bsky.social just published Immer 11.0 with the major architectural rewrite I did to improve perf! 10.2 already had several smaller tweaks, and there's one more PR up to add optional array overrides:
github.com/immerjs/imme...
New RTK release soon!
github.com/immerjs/imme...
New RTK release soon!
Release v11.0.0 Β· immerjs/immer
11.0.0 (2025-11-23)
Performance Improvements
Rewrite finalization system to use a callback approach instead of tree traversal (#1183) (d6c1202)
BREAKING CHANGES
enable loose iteration by defaul...
github.com
November 23, 2025 at 5:29 PM
_Very_ excited to announce that @mweststrate.bsky.social just published Immer 11.0 with the major architectural rewrite I did to improve perf! 10.2 already had several smaller tweaks, and there's one more PR up to add optional array overrides:
github.com/immerjs/imme...
New RTK release soon!
github.com/immerjs/imme...
New RTK release soon!