Massively parallel processing (MPP) architecture

How MPG works

pre-allocated region is typically kept 7:51 small the exact size depends on the 7:54 compiler we are using but generally it 7:56 won't exceed a few megabytes this might

Keep contexts going with context.WithoutCancel()

A nil slice doesn't allocate any memory.

When a parent goroutine creates a child goroutine in Go, the context can be propagated from the parent to the child. Context propagation allows the child goroutine to inherit and carry forward the same context values, deadlines, and cancellations.

This is basically a context switch of go-routines done by runtime scheduler. Observe that when send operation was executed, G1 was running, but by the end of the operation, G2 is running and G1 is blocked. Also note that, OS thread t1(m) is not blocked.

The important thing to note here is that the copy into and out of the channel buffer is what gives us memory safety. The only shared memory both the go-routines access is hchan which is protected by mutex. Every object is just a copy. This property is what allows channels to align with the principle

recvq and sendq: These fields represent the waiting queues for blocked goroutines that are either waiting to read data from or write data to the channel. It contains reference to another structure sudog, which also plays a role in channel operations but will be explored later in the blog.

Singelton Pattern

Factory Method

Decorator Pattern

1. Builder Pattern