HTTP/1.1 without pipelining: Each HTTP request over the TCP connection must be responded to before the next request can be made. HTTP/1.1 with pipelining: Each HTTP request over the TCP connection may be made immediately without waiting for the previous request’s response to return. The responses will come back in the same order. HTTP/2 multiplexing: … Read more
Superscalar design involves the processor being able to issue multiple instructions in a single clock, with redundant facilities to execute an instruction. We’re talking about within a single core, mind you — multicore processing is different. Pipelining divides an instruction into steps, and since each step is executed in a different part of the processor, … Read more
Pipelining is primarily a network optimization. It essentially means the client buffers up a bunch of commands and ships them to the server in one go. The commands are not guaranteed to be executed in a transaction. The benefit here is saving network round trip time for every command. Redis is single threaded so an … Read more