Why Does My Go Program Hang Despite `runtime.GOMAXPROCS(2)` and High CPU Usage?

Despite GOMAXPROCS(2), Program Remains Stalled

Encountering a perplexing scenario where a program configured with runtime.GOMAXPROCS(2) continues to hang during numeric output is a perplexing situation. Despite high CPU utilization, the for loop goroutines appear to hinder program functionality.

Delving into the Cause

The culprit in this code lies within the existence of a goroutine named forever that continuously executes an infinite for loop without pauses. This action results in the complete consumption of an entire OS thread, effectively interfering with the runtime's goroutines.

Resolving the Issue

To rectify this situation, it is crucial to eliminate the unnecessary forever goroutine. Furthermore, inserting a scheduling point within the for loop of the show function can restore program functionality.

Revised Code

Eliminating Busy Loops

It is vital to avoid busy loops that lack any productive work. They unnecessarily consume CPU resources and prove detrimental to the overall performance of goroutines. Instead, consider incorporating pauses into the loop or eliminating the loop entirely for optimized program behavior.

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