Jan Lehnardt
@janl.bsky.narrativ.es
25 years on the web.
Makes CouchDB, PouchDB & #offlinefirst.
CEO at @bsky.neighbourhood.ie.
ASF Member & CouchDB PMC Chair.
Made JSConf EU, Greenkeeper, Hoodie, Mustache.js.
Dissatisfied with the status-quo.
Soft Boy. Likes birds, bikes & bees.
Makes CouchDB, PouchDB & #offlinefirst.
CEO at @bsky.neighbourhood.ie.
ASF Member & CouchDB PMC Chair.
Made JSConf EU, Greenkeeper, Hoodie, Mustache.js.
Dissatisfied with the status-quo.
Soft Boy. Likes birds, bikes & bees.
Not so trivial then
November 11, 2025 at 5:58 PM
Not so trivial then
JSC no, V8 yes, it’s even worse with the API changes. We need this to be stable for years, not change every six weeks.
November 11, 2025 at 12:31 PM
JSC no, V8 yes, it’s even worse with the API changes. We need this to be stable for years, not change every six weeks.
- native support for UUIDv7
- substantial speedups for bulk operations, purge operations and any btree operations by introducing a cache
- support for Debian Trixie
- Erlang 26 as minimum version
- Allow safe downgrading of CouchDB versions
Which makes it a pretty cool release :)
AMA.
- substantial speedups for bulk operations, purge operations and any btree operations by introducing a cache
- support for Debian Trixie
- Erlang 26 as minimum version
- Allow safe downgrading of CouchDB versions
Which makes it a pretty cool release :)
AMA.
November 11, 2025 at 11:06 AM
- native support for UUIDv7
- substantial speedups for bulk operations, purge operations and any btree operations by introducing a cache
- support for Debian Trixie
- Erlang 26 as minimum version
- Allow safe downgrading of CouchDB versions
Which makes it a pretty cool release :)
AMA.
- substantial speedups for bulk operations, purge operations and any btree operations by introducing a cache
- support for Debian Trixie
- Erlang 26 as minimum version
- Allow safe downgrading of CouchDB versions
Which makes it a pretty cool release :)
AMA.
Most surprising though is that the scanner found more differences in SpiderMonkey versions (1.8.5, 76, 81, 115, 128) than SpiderMonkey vs QuickJS. We’ve copiously documented the differences: docs.couchdb.org/en/stable/be...
That said, the 3.5.1 highlights aside from bugfixes are:
…
That said, the 3.5.1 highlights aside from bugfixes are:
…
4.4. JavaScript development tips — Apache CouchDB® 3.5 Documentation
docs.couchdb.org
November 11, 2025 at 11:06 AM
Most surprising though is that the scanner found more differences in SpiderMonkey versions (1.8.5, 76, 81, 115, 128) than SpiderMonkey vs QuickJS. We’ve copiously documented the differences: docs.couchdb.org/en/stable/be...
That said, the 3.5.1 highlights aside from bugfixes are:
…
That said, the 3.5.1 highlights aside from bugfixes are:
…
Since version 3.4 which introduced QuickJS, CouchDB ships with a background scanner module that will urn your SpiderMonkey JS in QuickJS and reports any incompatibilities. That you you can know ahead of time if it is safe to migrate:
neighbourhood.ie/blog/2024/09...
neighbourhood.ie/blog/2024/09...
Neighbourhoodie - CouchDB 3.4.1 New Feature QuickJS
Neighbourhoodie Software is a software development company based in Berlin, Germany. We are experts in CouchDB, PouchDB, and Offline First.
neighbourhood.ie
November 11, 2025 at 11:06 AM
Since version 3.4 which introduced QuickJS, CouchDB ships with a background scanner module that will urn your SpiderMonkey JS in QuickJS and reports any incompatibilities. That you you can know ahead of time if it is safe to migrate:
neighbourhood.ie/blog/2024/09...
neighbourhood.ie/blog/2024/09...
- we even had to ship 3.5.1 with just QuickJS because RHEL/Alma 10 doesn’t do SM anymore at all.
QuickJS is smaller, faster, lower memory footprint and we made it safe to migrate.
QuickJS is smaller, faster, lower memory footprint and we made it safe to migrate.
November 11, 2025 at 11:06 AM
- we even had to ship 3.5.1 with just QuickJS because RHEL/Alma 10 doesn’t do SM anymore at all.
QuickJS is smaller, faster, lower memory footprint and we made it safe to migrate.
QuickJS is smaller, faster, lower memory footprint and we made it safe to migrate.
Shit, I’m sorry! :(
November 11, 2025 at 6:12 AM
Shit, I’m sorry! :(
Fucking hell, hope you’re okay soon!
November 9, 2025 at 5:44 PM
Fucking hell, hope you’re okay soon!
I’m filled with hope like nothing else does every time I see them.
November 7, 2025 at 8:31 PM
I’m filled with hope like nothing else does every time I see them.
He never worked for me as bond, but here and now. Yeap.
October 16, 2025 at 6:16 AM
He never worked for me as bond, but here and now. Yeap.
I can’t make it this year but it’d be so lovely to see you there. Hopefully next year!
October 13, 2025 at 8:17 AM
I can’t make it this year but it’d be so lovely to see you there. Hopefully next year!
Reposted by Jan Lehnardt
why are you notifying package authors on friday night about a change that takes effect monday morning. what the hell are you doing
October 10, 2025 at 10:20 PM
why are you notifying package authors on friday night about a change that takes effect monday morning. what the hell are you doing
Oh and we are exporting 5–10GW on top and prices are low to zero.
Love everything* about this.
(*still lots to be done)
Thanks app.electricitymaps.com/map/live/
Love everything* about this.
(*still lots to be done)
Thanks app.electricitymaps.com/map/live/
app.electricitymaps.com
October 5, 2025 at 2:06 PM
Oh and we are exporting 5–10GW on top and prices are low to zero.
Love everything* about this.
(*still lots to be done)
Thanks app.electricitymaps.com/map/live/
Love everything* about this.
(*still lots to be done)
Thanks app.electricitymaps.com/map/live/