Releases

v1.11.0

Introduce IO::Event::WorkerPool for off-loading blocking operations.

The IO::Event::WorkerPool provides a mechanism for executing blocking operations on separate OS threads while properly integrating with Ruby's fiber scheduler and GVL (Global VM Lock) management. This enables true parallelism for CPU-intensive or blocking operations that would otherwise block the event loop.

# Fiber scheduler integration via blocking_operation_wait hook
class MyScheduler
	def initialize
		@worker_pool = IO::Event::WorkerPool.new
	end

  def blocking_operation_wait(operation)
    @worker_pool.call(operation)
  end
end

# Usage with automatic offloading
Fiber.set_scheduler(MyScheduler.new)
# Automatically offload `rb_nogvl(..., RB_NOGVL_OFFLOAD_SAFE)` to a background thread:
result = some_blocking_operation()

The implementation uses one or more background threads and a list of pending blocking operations. Those operations either execute through to completion or may be cancelled, which executes the "unblock function" provided to rb_nogvl.

v1.10.2

• Improved consistency of handling closed IO when invoking #select.

v1.10.0

• IO::Event::Profiler is moved to dedicated gem: fiber-profiler.
• Perform runtime checks for native selectors to ensure they are supported in the current environment. While compile-time checks determine availability, restrictions like seccomp and SELinux may still prevent them from working.

v1.9.0

• Improved IO::Event::Profiler for detecting stalls.

v1.8.0

• Detecting fibers that are stalling the event loop.

v1.7.5

• Fix process_wait race condition on EPoll that could cause a hang.