tl;dr:"Corporate websites seem so slow these days... What's going on? Everything related to e-commerce websites has gotten slow and sluggish on mobile, on fast desktops, on fast Internet connections... They are just slow." Rob explains why.
tl;dr:(1) Don't communicate by sharing memory, share memory by communicating. (2) Concurrency is not parallelism. (3) Channels orchestrate; mutexes serialize. (4) The bigger the interface, the weaker the abstraction. (5) Make the zero value useful. And more.