asynchronous programming
compound.compound. a way of writing computer code so that a program can start a task and then move on to other work while it waits for that task to finish. This stops the software from freezing while it downloads data or saves a file.
compound. a design pattern in software development where operations are executed independently of the main program flow, allowing the system to remain responsive during long-running tasks. It relies on non-blocking execution and event loops to manage concurrent operations without requiring multiple CPU threads.
Asynchronous programming keeps the app responsive while it loads data.
By using asynchronous programming, the web server can handle thousands of concurrent user requests without waiting for each database query to complete.
The transition to asynchronous programming in modern web frameworks has significantly improved user experience by preventing the main thread from blocking during intensive input-output operations.
Formed from the prefix a- (meaning without) and the Greek-derived synchronous (occurring at the same time), combined with the late Middle English programming. The term entered computing as a loan from telecommunications and electrical engineering, where it described signals not synchronised by a common clock.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.
asynchronous programming makes code run fasterasynchronous programming makes code more efficientAsynchronous programming does not speed up individual tasks; it allows the system to handle other tasks while waiting, improving overall throughput rather than raw speed.
Last updated July 22, 2026