How Can I Prevent Function Inlining in Go?

Strategies for Restricting Inlining in Go

Go's compiler often employs inlining, a technique that embeds the body of a function directly into its call site. While inlining can enhance performance, there are instances when it may be undesirable. This article explores various methods to prevent inlining in Go.

Disabling Inlining for Specific Functions

To restrict inlining for a particular function, utilize the "//go:noinline" pragma. Place it before the function definition:

//go:noinline
func isPrime(p int) bool {
    // ...
}

Disabling All Inlining

To disable inlining globally, invoke the compiler with the "-gcflags=-l" flag:

go build -gcflags=-l primes.go

This flag instructs the compiler to prioritize code size over performance optimizations.

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