Load balancing distributes incoming work across multiple workers so additional processing resources can be used effectively. In Go, a channel can act as a shared work queue: several goroutines receive tasks from it, spreading demand instead of concentrating it on one worker. section 1.0 section 10.2.3
Figure 10.8 shows the flow from an HTTP server’s accepting goroutine, through a channel-based work queue, to several worker goroutines. section 10.2.3
A small HTTP server demonstrates the pattern:
- Create an incoming-connections channel and start a fixed number of workers. Each worker ranges over the channel and handles one connection before waiting for another. section 10.2.3
Payroll processing
Divide payroll into employee groups, process the groups concurrently with multiple goroutines, distribute them through a channel, and collect results through another channel. Simulations report at least a fivefold speed improvement on the same multicore hardware, although race-condition testing remains necessary. section 1.0
