What's Changed

SemVer Patch

• Handle EPERM as permissionDenied in open syscall error mapping by @queelius in #3560
• Fix thread pinning test, which crashed in CPU-restricted environments by @simonjbeaumont in #3562

New Contributors

• @queelius made their first contribution in #3560

Full Changelog: 2.97.0...2.97.1

What's Changed

SemVer Minor

• Enable thread-pools to be pinned to CPUs by @Lukasa in #3557

SemVer Patch

• Add partial support for FreeBSD by @kkebo in #3494

Other Changes

• Benchmarks for channel pipeline creation by @Lukasa in #3531
• Fix flakey testScheduledCallbackNotExecutedBeforeDeadline by @rnro in #3550
• Fix flakey testHalfCloseOwnOutputWithPopulatedBuffer on iOS sim by @rnro in #3551
• Increase macOS test timeout by @madrob in #3553
• Fix flaky testCopyFileReplacingExistingFileSucceeds by @fabianfett in #3554
• Fix testFlatBlockingMapOnto crashing on iOS simulator by @rnro in #3555
• Fix flakey scheduled callback cancellation tests on iOS simulator by @rnro in #3556

New Contributors

• @kkebo made their first contribution in #3494

Full Changelog: 2.96.0...2.97.0

What's Changed

SemVer Minor

• ByteBuffer custom allocator support by @rnro in #3526
• Add the replaceExisting to the _NIOFileSystem copyItem by @stepan-ulyanin in #3535
• Make MTELG's support for CPU pinning public by @Lukasa in #3543

SemVer Patch

• Make concurrency take over cheaper by @Lukasa in #3527
• Improve the performance of looking up the current SEL by @Lukasa in #3530
• Add symlinkat, renameatx_np, and unlinkat system call wrappers to the _NIOFileSystem module by @stepan-ulyanin in #3524
• Improve NIOAsyncChannel performance with UnsafeContinuations by @fabianfett in #3521
• Support scoped IPv6 addresses in SocketAddress.init(ipAddress:port:) by @mihai-chiorean in #3525
• Deprecate System.udpMaxSegments by @glbrntt in #3541

Other Changes

• switch from main to 0.0.7 for swiftlang workflows by @rnro in #3514
• Benchmark diffs not being output on threshold regression by @rnro in #3515
• benchmark diff missing new threshold files by @rnro in #3516
• Wait for the docker daemon on Windows by @FranzBusch in #3520
• Apple platforms CI issues by @rnro in #3519
• Add parallel execution mode for integration tests by @rnro in #3522
• Disable Swift 5.10 CI jobs by default by @rnro in #3528
• Scope benchmark threshold diff to Thresholds/ directory by @rnro in #3529
• Static sdk version by @rnro in #3534
• shutdown simulators before launching more tests by @madrob in #3539
• Extend timeout in testShutdownCancelsOutstandingScheduledCallbacks by @rnro in #3537
• Add debug_output_enabled parameter to macOS CI workflow by @rnro in #3542
• test: Port EventLoopTest to Swift Testing. by @scottmarchant in #3503
• Increase Docker daemon wait timeout for Windows by @kukushechkin in #3544
• Remove .timeLimit from EventLoopTest Swift Testing attributes by @rnro in #3545
• Add macos swift xcode mappings by @rnro in #3546
• Replace Task.sleep(for:) with Task.sleep(nanoseconds:) in `EventL… by @rnro in #3548
• Pass inputs through env vars by @rnro in #3549

New Contributors

• @mihai-chiorean made their first contribution in #3525

Full Changelog: 2.95.0...2.96.0

What's Changed

SemVer Minor

• Add opt-in API for channels to expose their underlying transport by @simonjbeaumont in #3509

SemVer Patch

• Don't send (in)active when channel closes directly by @josephnoir in #3497

Other Changes

• Fix C++ interop CI script to work with changes in SwiftPM by @simonjbeaumont in #3510
• Fix benchmark succeeding – even though Benchmark build failed by @fabianfett in #3502
• Allow to copy files and symlinks while overwriting the destination by @stepan-ulyanin in #3508
• Workaround test crashing when compiled in release mode on Swift 6.2 by @simonjbeaumont in #3511

Full Changelog: 2.94.1...2.95.0

What's Changed

SemVer Patch

• Centralize UnsafeTransfer in NIOCore by @fabianfett in #3492
• Add symlinkat, renameatx_np, and unlinkat system call wrappers by @stepan-ulyanin in #3505
• Replace ConditionLock with wake-one signalling NIOThreadPoolWorkAvailable by @KushalP in #3507

Other Changes

• Add support for Xcode 26.2 by @FranzBusch in #3498
• Fix Xcode 26.2 CI copy and paste error by @FranzBusch in #3499
• test: Port EventLoopFutureTest to Swift Testing. by @scottmarchant in #3491
• test: Port NIOThreadPoolTest to Swift Testing. by @scottmarchant in #3490
• Clarify state and relationship of NIOFileSystem and _NIOFileSystem in API docs by @simonjbeaumont in #3504

New Contributors

• @KushalP made their first contribution in #3507

Full Changelog: 2.94.0...2.94.1

What's Changed

SemVer Minor

• Add API to enable throwing in EmbeddedChannel.getOption and .setOption if channel is closed by @simonjbeaumont in #3495

SemVer Patch

• Update macOS runners to Tahoe by @kukushechkin in #3489
• chore: Elide mutex variable from Lock class when it is unused by @scottmarchant in #3483
• build: Elide NIOEmbedded for WASI platforms only by @scottmarchant in #3484
• build: Elide NIOPosix for WASI platforms only by @scottmarchant in #3485

Other Changes

• Bump actions/checkout from 6.0.1 to 6.0.2 by @dependabot[bot] in #3493
• Move nightly-next CI to 6.3 by @FranzBusch in #3496

New Contributors

• @dependabot[bot] made their first contribution in #3493

Full Changelog: 2.93.0...2.94.0

What's Changed

SemVer Minor

• Add homeDirectory accessor to FileSystem by @PhantomInTheWire in #3471

SemVer Patch

• NIOTypedHTTPClientUpgradeHandler will write Upgrade request on handlerAdded if active by @adam-fowler in #3473
• Ensure pthread_mutexattr_t is properly cleaned up with pthread_mutexattr_destroy in Lock by @scottmarchant in #3480
• Initialize the mutexattr before use. by @3405691582 in #3482

Other Changes

• Updates to present docs on _NIOFileSystem by @heckj in #3477
• Disable Xcode-beta builds until one is installed by @madrob in #3446

New Contributors

• @heckj made their first contribution in #3477

Full Changelog: 2.92.2...2.93.0

What's Changed

SemVer Patch

• Cancel pending in/outbound consumers in EmbeddedChannelCore upon channel close by @aryan-25 in #3464

Other Changes

• docs: String(buffer:) needs to mention that it will always succeed by @PhantomInTheWire in #3476

New Contributors

• @PhantomInTheWire made their first contribution in #3476

Full Changelog: 2.92.1...2.92.2

What's Changed

SemVer Patch

• Allowlist 6.3 to be allowable for Swift Concurrency takeover by @weissi in #3467
• Fix coreCount on Linux when using cgroup v2 with CFS throttling disabled by @mitchellallison in #3462

Other Changes

• Update integration test allocation thresholds for nightly-main by @aryan-25 in #3465
• ci: only run self-hosted ci on apple runners by @madrob in #3468

New Contributors

• @mitchellallison made their first contribution in #3462

Full Changelog: 2.92.0...2.92.1

What's Changed

SemVer Minor

• Add ByteBuffer.readableBytesUInt8Span by @adam-fowler in #3458

SemVer Patch

• Use explicit class name in all Self.[un]wrap{In}{Out}bound{In}{Out} calls by @aryan-25 in #3463

Other Changes

• Update actions/checkout and introduce dependabot by @madrob in #3459
• Extract macOS benchmarks into a separate reusable workflow by @kukushechkin in #3461

Full Changelog: 2.91.0...2.92.0