v0.10.0

Kyo v0.10.0

This version introduces new major features and important fixes. Main highlights:

1. kyo-tag: Kyo now has a new type Tag implementation that provides allocation-free sub-type checking. This new solution addresses safety issues with effect handling in generic scopes and its improved performance unblocks some important new features and fixes. A separate artifact kyo-tag is produced with no dependency on any other Kyo modules, enabling the use of the new Tag in isolation by other projects.
2. kyo-zio: The initial implementation of the ZIOs effect is included in this new release. It provides a seamless integration between Kyo and ZIO via two methods: ZIOs.get transforms a ZIO computation into a Kyo one, and ZIOs.run transforms Kyo computations into ZIO. These methods can even be used in a nested fashion, enabling the gradual adoption of Kyo within a ZIO codebase. Feedback is appreciated!
3. kyo-scheduler-zio: Provides a ZIO Runtime instance configured to replace ZExecutor with Kyo's adaptive scheduler. Initial benchmarking shows promising performance improvements. We're looking for early adopters of this new module. It's also a standalone module without a dependency on kyo-core.
4. Java Futures integration: Kyo fibers now integrate with Java futures via Fibers.fromCompletionStageand Fibers.fromCompletionStageFiber. Thank you @calvinlfer!
5. Flat Check Fixes: The Flat implicit is essential to guarantee the safe execution of Kyo computations. This mechanism was failing to engage properly in some scenarios; this version fixes those cases.
6. Exception handling regression: A performance regression was detected by one of the EasyRacer scenarios. The regression was narrowed down to a change in Kyo's exception handling, which has been reverted in this release. The work on this regression also produced a number of other smaller optimizations.
7. Scheduler Top: A new command-line utility to observe the execution of Kyo's scheduler is provided as a main class under kyo.scheduler.util.Top. The solution works via JMX beans and is designed to be used in production environments as well. Example output:

Special thanks to @hearnadam for all the contributions!

What's Changed

• Make HasAborts public again by @johnhungerford in #326
• Update client3:core to 3.9.6 by @scala-steward in #318
• Update zio, zio-concurrent, zio-test, ... to 2.1.0-RC5 by @scala-steward in #319
• Update scala-library to 2.13.14 by @scala-steward in #320
• Update sbt-scoverage to 2.0.12 by @scala-steward in #321
• Update log4cats-core, log4cats-slf4j to 2.7.0 by @scala-steward in #322
• zio integration by @fwbrasil in #303
• FFI for Java's CompletionStage by @calvinlfer in #324
• http client benchmarks by @fwbrasil in #328
• reproduce flat check bug (#327) by @fwbrasil in #334
• scheduler: don't check the availability of a submitter worker by @fwbrasil in #333
• requests: avoid switching to ForkJoinPool by @fwbrasil in #330
• fix Fibers.Interrupted to avoid lock contention in Throwable::getCause by @fwbrasil in #331
• Update zio-laws-laws, zio-prelude to 1.0.0-RC25 by @scala-steward in #336
• Update sbt to 1.10.0 by @scala-steward in #338
• Update http4s-dsl, http4s-ember-client to 0.23.27 by @scala-steward in #337
• requests: race 10k requests test by @fwbrasil in #332
• Update zio, zio-concurrent, zio-test, ... to 2.1.0 by @scala-steward in #344
• Update izumi-reflect to 2.3.9 by @scala-steward in #343
• benchs: detect runtime leaks by @fwbrasil in #345
• benchs: registry mechanism by @fwbrasil in #346
• logs: include scope information + convenience methods to log values by @fwbrasil in #341
• flat check fixes by @fwbrasil in #349
• Update zio, zio-concurrent, zio-test, ... to 2.1.1 by @scala-steward in #351
• Update opentelemetry-api, ... to 1.38.0 by @scala-steward in #352
• better support for other effects in Resources by @fwbrasil in #355
• (almost) allocationless tags ⚡ by @fwbrasil in #348
• move effect command from member type to type parameter by @fwbrasil in #356
• move Tag to separate module by @fwbrasil in #357
• Update zio-laws-laws, zio-prelude to 1.0.0-RC26 by @scala-steward in #358
• Tag optimizations by @fwbrasil in #359
• direct macro refactorings by @fwbrasil in #360
• workaround to declare effects as opaque by @fwbrasil in #361
• automatically derive Flat from Tag by @fwbrasil in #366
• kyo-sttp: avoid translating Interrupted exceptions by @fwbrasil in #365
• http client race bench by @fwbrasil in #364
• scheduler: top utility by @fwbrasil in #363
• cache stream handlers by @fwbrasil in #367
• scala-js: add java-time dependency by @hearnadam in #362
• scheduler top improvements by @fwbrasil in #369
• avoid core.eval for error handling by @fwbrasil in #373
• avoid lazy val to access KyoSttpMonad by @fwbrasil in #371
• Reproduce #368: Stream transform test by @hearnadam in #374
• kyo-sttp: ensure backpressure by @fwbrasil in #375
• Update zio-logging, zio-logging-slf4j2 to 2.2.4 by @scala-steward in #370
• kyo-sttp: backend meter by @fwbrasil in #376
• scheduler: ensure workers stop when inactivated by @fwbrasil in #372
• kyo-benchs: migrate TestHttpServer to Vert.x by @fwbrasil in #377
• http race contention bench: use a meter to avoid overloading the http server by @fwbrasil in #381
• kyo-tag: support type unions and intersections by @fwbrasil in #378
• Update zio-http to 3.0.0-RC7 by @scala-steward in #382
• scheduler: minor optimizations by @fwbrasil in #384
• scala 3.4.2 by @fwbrasil in #385
• zios: readme by @fwbrasil in #380
• kyo-scheduler-zio by @fwbrasil in #386
• Enable choosing a Position with/without owning scope by @hearnadam in #387
• Update os-lib to 0.10.1 by @scala-steward in #388

New Contributors

• @calvinlfer made their first contribution in #324

Full Changelog: v0.9.3...v0.10.0