The JRuby community is pleased to announce the release of JRuby 10.1.2.0.

* Homepage: [https://www.jruby.org/](https://www.jruby.org/)
* Download: [https://www.jruby.org/download](https://www.jruby.org/download)

JRuby 10.1.x targets Ruby 4.0 compatibility.

Thank you to our contributors this release, you help keep JRuby moving forward! [@aminmansuri], [@drzaiusx11], [@evaniainbrooks], [@gillesbergerp], [@jcharaoui], [@jwils], [@kares], [@lloeki], [@makenowjust], [@nobu], [@sampokuokkanen], [@shugo]

Notable Changes
---------------

### Compatibility

* Multiple fixes for fibers and fiber scheduler support. [#9604], [#9607], [#9622], [#9645], [#9649], [#9656], [#9660]

### Performance

* Fixed a regression in startup time on MacOS by properly loading native JNR subsystem. [#9690]
* Improve performance of Ruby subclasses of Java classes. [#9619], [#9557]
* Improve performance of autoloads overridden by an actual require. [#9677]

### Java Integration

* The location of the AppCDS JSA file can now be specified with JRUBY_JSA_HOME. [#9667]

### Standard Library

* Update to jar-dependencies 0.6.1 using mima for dependency resolution instead of the ruby-maven gem. [#9515], [#9720]
* Update default and bundled standard library gems. [#9705]

#### Default gems

* erb 6.0.7
* error_highligh 0.7.2
* ffi 1.17.4
* io-console 0.9.4
* ipaddr 1.2.9
* jruby-openssl 0.16.2
* json 2.21.2
* net-protocol 0.4.0
* pp 0.6.4
* psych 5.5.0
* resolv 0.8.0
* strscan 3.1.8
* syntax_suggest 3.0.0
* timeout 0.6.1
* win32-registry 0.1.2

#### Bundled gems

* bigdecimal 4.1.2 (ruby parts only)
* csv 3.3.6
* minitest 5.27.0
* net-imap 0.6.7
* nkf 0.3.0
* pstore 0.2.1
* rdoc 7.2.0
* reline 0.7.0
* resolv-replace 0.2.0
* rss 0.3.3
* test-unit 3.7.8

### 76 Issues and PRs resolved for 10.1.2.0