Choose appropriate synchronization primitives

Select the right synchronization mechanism based on your specific use case to avoid performance regressions and ensure thread safety. Follow these guidelines:

Context Management: Always call defer cancel() immediately after creating a cancellable context to ensure proper cleanup:

ctx, cancel := context.WithCancel(c.Context())
defer cancel()

Mutex Selection: Prefer regular sync.Mutex over sync.RWMutex unless you have a read-heavy workload. RWMutex can be less efficient and cause performance regressions in typical scenarios.

Atomic Operations: Use modern atomic types like atomic.Int64 instead of manual atomic operations on primitive types for better safety and readability.

Test Synchronization: Use channels or other explicit synchronization mechanisms in tests to avoid flakiness, rather than relying on timing:

done := make(chan struct{})
go func() {
    // test logic
    close(done)
}()
<-done // wait for completion

Race Condition Prevention: In timeout scenarios with context cancellation, ensure proper ordering of operations and consider using locks when multiple goroutines access shared state concurrently.