Go Interfaces: Static Compile-Time Checking, Dynamic Run-Time Dispatch
2025-02-09
Go's interfaces, a unique blend of static type checking and dynamic dispatch, are arguably its most exciting feature. This post delves into the implementation details of interface values within Go's gc compilers, covering their memory representation, itable (interface table) generation and caching, and memory optimizations for various data sizes. Through code examples and illustrations, the author clearly explains how Go achieves compile-time type safety and efficient run-time interface calls. Comparisons with other languages' interface implementations highlight Go's distinctive approach.