When is it preferable to use Mutex instead of RWMutex in designing concurrent logic in Go?

Mutex (mutual exclusion) is preferable to use when your program predominantly involves write operations or when the number of read and write operations is roughly equal. This is because RWMutex (read-write mutex) allows multiple goroutines to read simultaneously but blocks writing while there are active readers.

If you have many write operations or frequent switching between reading and writing, the overhead of managing RWMutex may outweigh the benefits of parallel reading. In such cases, it is simpler and more efficient to use a regular Mutex.

Example:

• If you have a data structure that is frequently updated (written to) but rarely read, use Mutex.
• If data is read very often and rarely changed, RWMutex can improve performance.

Thus, the choice depends on the nature of the load and the frequency of read/write operations.