Changelog

Share now defaults to ShareConfig.ResetOnCompletionAndRefCountZero, matching Rx's Publish().RefCount(): the source is disconnected when the last subscriber leaves, and a completed connection is restarted on the next subscription. Pass new ShareConfig() to keep the previous behavior.
Merge overloads gained an optional MergeOptions parameter. This is source compatible, but code compiled against 1.x must be recompiled.

AsyncGate uses a pooled FIFO queue of waiters instead of SemaphoreSlim plus a continuation. Each wait allocates much less, and a release hands the gate straight to the first waiter, so no other caller can jump the queue.
A single AsyncLocal for the whole library (ExecutionFlow) replaces the per-observer, per-gate and per-subscription ones, so the ExecutionContext stays small in long pipelines.
Linked cancellation tokens are reused across notifications instead of creating a CancellationTokenSource for every value.
Consecutive synchronous Select/Where calls are fused into a single operator.
On net6+, OnNextAsync and the Merge forwarding methods use PoolingAsyncValueTaskMethodBuilder.
New MergeOptions.DetachInnerCancellation option avoids linking a token per value in Merge.

Share: an observer that joins or leaves during a subscription no longer resets the connection. Subscribe and connect failures are handled more reliably.
Debounce / Throttle: OnErrorResume is no longer forwarded after termination.
TakeUntil, Debounce, Throttle, Timeout: callers waiting on the gate are released when the subscription is disposed (in Timeout, only for OnErrorResume).
TakeUntil: errors are reported to UnhandledExceptionHandler instead of being silently swallowed.
Merge(IEnumerable): subscribing now waits until all sources are subscribed, and the startup method is no longer async void.
UnhandledExceptionHandler.Register is thread-safe and rejects null.

global.json pins the .NET 10 SDK, and the CI workflows install the SDK version it specifies.

Navigation Menu