goexperiment

type Flags struct {
	FieldTrack        bool
	PreemptibleLoops  bool
	StaticLockRanking bool
	BoringCrypto      bool

	// RegabiWrappers enables ABI wrappers for calling between
	// ABI0 and ABIInternal functions. Without this, the ABIs are
	// assumed to be identical so cross-ABI calls are direct.
	RegabiWrappers bool
	// RegabiArgs enables register arguments/results in all
	// compiled Go functions.
	//
	// Requires wrappers (to do ABI translation), and reflect (so
	// reflection calls use registers).
	RegabiArgs bool

	// HeapMinimum512KiB reduces the minimum heap size to 512 KiB.
	//
	// This was originally reduced as part of PacerRedesign, but
	// has been broken out to its own experiment that is disabled
	// by default.
	HeapMinimum512KiB bool

	// CoverageRedesign enables the new compiler-based code coverage
	// tooling.
	CoverageRedesign bool

	// Arenas causes the "arena" standard library package to be visible
	// to the outside world.
	Arenas bool

	// PageTrace enables GODEBUG=pagetrace=/path/to/result. This feature
	// is a GOEXPERIMENT due to a security risk with setuid binaries:
	// this compels the Go runtime to write to some arbitrary file, which
	// may be exploited.
	PageTrace bool

	// CgoCheck2 enables an expensive cgo rule checker.
	// When this experiment is enabled, cgo rule checks occur regardless
	// of the GODEBUG=cgocheck setting provided at runtime.
	CgoCheck2 bool

	// LoopVar changes loop semantics so that each iteration gets its own
	// copy of the iteration variable.
	LoopVar bool

	// CacheProg adds support to cmd/go to use a child process to implement
	// the build cache; see https://github.com/golang/go/issues/59719.
	CacheProg bool

	// NewInliner enables a new+improved version of the function
	// inlining phase within the Go compiler.
	NewInliner bool

	// RangeFunc enables range over func.
	RangeFunc bool

	// Range enables range over int and func.
	Range bool

	// AllocHeaders enables a different, more efficient way for the GC to
	// manage heap metadata.
	AllocHeaders bool

	// ExecTracer2 controls whether to use the new execution trace
	// implementation.
	ExecTracer2 bool
}