golang-data-structures

Optimize Go slices by preallocating capacity to prevent reallocation overhead and avoiding aliasing pitfalls where underlying arrays retain references, causing memory leaks. Apply these patterns directly to hot paths in your codebase.

Preallocate Go maps when the final size is known to avoid rehashing overhead. Use pointers as map values to prevent unnecessary struct copying during iterations and modifications, reducing memory pressure in performance-critical code.

The difference between strings.Builder and bytes.Buffer in Go lies in memory layout and copy semantics. strings.Builder avoids redundant string copying, while bytes.Buffer supports read/write operations, making Builder more efficient for pure string concatenation.

You should not use generics for Go data structures when type constraints add unnecessary complexity without clear performance benefits. Overusing generics in simple containers or primitive wrappers can reduce readability without optimizing memory layout or execution speed.

Go copy semantics affect data structure performance by determining whether values or pointers are duplicated during assignments. Understanding how data is moved allows you to minimize memory allocations and avoid aliasing bugs in performance-critical code.

Yes, this guide covers Go container types like container/list, heap, and ring. It explains their internal memory layouts, growth behaviors, and specific use cases compared to standard slices and maps for performance-critical workloads.