Which is better to choose for this task: buffered or unbuffered channel? How do they differ?

A buffered channel in Go has an internal buffer that allows the sender to write multiple values without waiting for the receiver immediately. This is useful when you need to smooth out the speed difference between sender and receiver, for example, if the sender generates data faster than the receiver processes it.

An unbuffered channel has no buffer, so the sender blocks until the receiver reads the value. This ensures synchronization between goroutines, guaranteeing that data is transferred directly.

The choice depends on the task:

• If synchronization is important and you want the sender and receiver to work strictly in turn, it is better to use an unbuffered channel.
• If you need to increase throughput and avoid blocking with small delays, a buffered channel is better.

Example of a buffered channel:

ch := make(chan int, 5) // buffer of 5 elements
ch <- 1 // does not block until the buffer is full

Example of an unbuffered channel:

ch := make(chan int) // no buffer
ch <- 1 // blocks until someone reads from the channel