The worker pool pattern is a fundamental Go concurrency pattern for distributing work across a fixed number of goroutines. Instead of creating a new goroutine for each task (which would be inefficient under high load), you maintain a constant pool of worker goroutines that all listen on the same jobs channel.
This pattern scales well because you control the number of concurrent workers regardless of how many jobs you have. Workers receive jobs from the jobs channel and send their results to a results channel. When you close the jobs channel, all workers automatically exit their receive loop after processing remaining jobs.
This approach is ideal for CPU-bound work or when you need to limit concurrent resource usage like database connections or API calls.