Can you give examples of factors that can negatively affect thread performance?

Factors negatively affecting goroutine performance in Go:

• Excessive context switching — if there are too many goroutines and they switch frequently, it creates overhead.

• Locks and data races — using mutexes, channels, or other synchronization primitives can lead to waiting and reduced parallelism.

• Incorrect use of channels — for example, blocking read/write operations without buffering can cause deadlocks.

• Large number of long-lived goroutines — if goroutines do not terminate, they consume memory and resources.

• Poor load distribution — unevenly loaded goroutines may lead to some being idle while others are overloaded.

• System limitations — OS thread limits, insufficient memory, or CPU resources.

Example:

var mu sync.Mutex

func worker() {
    mu.Lock()
    defer mu.Unlock()
    // critical section
}

If many goroutines try to acquire mu simultaneously, they will block, reducing performance.