Concurrency

Concurrency is the architectural decomposition of a program into independent tasks that communicate to handle multiple jobs simultaneously.

Modern systems demand high throughput and low latency; concurrency delivers this by decoupling execution paths. Unlike parallelism (running tasks at the exact same time on multiple cores), concurrency focuses on structure. Using primitives like Go's goroutines or Rust's async/await, developers manage thousands of concurrent operations (like I/O requests or background syncs) without the heavy overhead of OS threads. This approach maximizes CPU utilization and prevents blocking, ensuring that a single slow network call doesn't stall the entire application pipeline.

https://go.dev/doc/effective_go#concurrency