Use strconv Over fmt.Sprint in Go for Better String Conversion Performance

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In Go, many developers default to fmt.Sprint for converting basic data types like float64 to strings, but this approach carries a hidden performance cost. Because fmt.Sprint accepts an empty interface, Go wraps the concrete value in a two-pointer structure, and the package's reliance on reflection prevents the compiler from optimizing away heap allocations. Running Go's escape analysis flag (-gcflags='-m') reveals that variables converted via fmt.Sprint escape to the heap, increasing garbage collection pressure. Replacing fmt.Sprint with strconv functions such as strconv.FormatFloat keeps allocations on the stack, as confirmed by the same escape analysis showing 'does not escape' for all relevant variables. For performance-sensitive applications like CLI utilities, strconv is the recommended alternative for type-to-string conversions in Go.

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