Go Performance Review

Profile first, optimize second. Never optimize without a benchmark proving the problem.

1. Allocation Reduction

Prefer strconv over fmt for primitive conversions:

// ✅ Good — zero allocations for simple conversions
s := strconv.Itoa(42)
s := strconv.FormatFloat(3.14, 'f', 2, 64)

// ❌ Bad — fmt.Sprintf allocates
s := fmt.Sprintf("%d", 42)

Avoid unnecessary string-to-byte conversions: