Worker thread vs process: when would I use each?
Try code in the playgroundUnderstand the concept
A process is an independently running program with its own address space and operating-system resources. A worker thread is another execution thread inside a process; Node workers have separate JavaScript execution environments and can exchange messages or share selected memory. Workers help CPU parallelism, while processes also provide stronger failure isolation.
Important ideas
-
A worker thread runs JavaScript on another thread; useful for CPU-heavy work.
-
A process has its own memory and failure boundary; useful for separate app instances.
-
Use a worker pool instead of starting a new worker for every small task.
-
Include message-copying and startup costs when deciding whether a task is large enough to move to a worker.
Can you explain it without the notes?
Worker thread vs process: when would I use each?
Use your own words. Explain an example and one limitation before checking the explanation.
Check your explanation
A process is an independently running program with its own address space and operating-system resources. A worker thread is another execution thread inside a process; Node workers have separate JavaScript execution environments and can exchange messages or share selected memory. Workers help CPU parallelism, while processes also provide stronger failure isolation.
Turn this concept into a clear answer.
- Network waiting is usually already asynchronous; a worker is mainly useful when JavaScript computation is the bottleneck.
Adapted from 02_NODE_EXPRESS_HTTP.md · “Worker thread vs process: when would I use each?”. Examples are study fragments; framework behavior can depend on your version.