What reasons can cause delays when switching contexts in a system?

Context switch delay in a system can occur for several reasons:

• High CPU load: when many threads or goroutines compete for processor time.
• Locks and synchronization: waiting for resource release or mutexes increases switch time.
• Transition between kernel and user space: system calls and interrupt handling take time.
• Cache misses: context switching can lead to data loss in processor caches, slowing down execution.

In Go, for example, the goroutine scheduler tries to minimize switches, but with a large number of goroutines or locks, delays can increase.