JavaScript SharedArrayBuffer Patterns Cut Worker Latency to Microseconds

SharedArrayBuffer eliminates serialization overhead by giving workers direct access to the same memory, reducing 15ms postMessage copies to microsecond atomic operations. The approach uses Atomics.wait/notify and compare-and-swap for lock-free coordination, enabling ring buffers and work queues without blocking. Cross-origin isolation requirements are now stable in all major browsers as of 2026.