Best way for interprocess communication in C++

Question

I have two processes one will query other for data.There will be huge amount of queries in a limited time (10000 per second) and data (>100 mb) will be transferred per seco

Answer 1

If you do use shared memory you will have to decide whether or not to spin or not. I'd expect that if you use a semaphore for synchronization and storing data in shared memory you will not get much performance benefit compared to using message queues (at significant clarity degradation), but if you spin on an atomic variable for synchronization, then you have to suffer the consequences of that.