The BEAM Is Not Like Other Runtimes (And That's Why Elixir Scales the Way It Does)

BEAM uses lightweight, isolated processes instead of shared-memory threads.

Its reduction-based preemptive scheduler keeps the runtime responsive under heavy load.

Each process has its own garbage collector, improving latency and fault isolation.

This architecture underpins Elixir’s scalability and makes thread-based comparisons misleading.