return 0
	}
	return (float64(r.Bytes) * float64(r.N) / 1e6) / r.T.Seconds()
}

// AllocsPerOp returns the "allocs/op" metric,
// which is calculated as r.MemAllocs / r.N.
func (r BenchmarkResult) AllocsPerOp() int64 {
	if v, ok := r.Extra["allocs/op"]; ok {
		return int64(v)
	}
	if r.N <= 0 {
		return 0
	}
	return int64(r.MemAllocs) / int64(r.N)
}

// (Pipe is close-on-exec so if exec succeeds, it will be closed.)
// In the child, this function must not acquire any locks, because
// they might have been locked at the time of the fork. This means
// no rescheduling, no malloc calls, and no new stack segments.
// For the same reason compiler does not race instrument it.
// The calls to RawSyscall are okay because they are assembly
// functions that do not grow the stack.
//
//go:norace

	// The following complex 3-stage scheme of stats accumulation
	// is required to obtain a consistent picture of mallocs and frees
	// for some point in time.
	// The problem is that mallocs come in real time, while frees
	// come only after a GC during concurrent sweeping. So if we would
	// naively count them, we would get a skew toward mallocs.
	//
	// Hence, we delay information to get consistent snapshots as

// bytes with any other objects, allowing the GC program execution to
// assume an aligned start and not use atomic operations. In the current
// runtime, this means all malloc size classes larger than the cutoff must
// be multiples of four words. On 32-bit systems that's 16 bytes, and
// all size classes >= 16 bytes are 16-byte aligned, so no real constraint.

	// Clear the flag indicating that this assist completed the
	// mark phase.
	gp.param = nil

	if atomic.Load(&gcBlackenEnabled) == 0 {
		// The gcBlackenEnabled check in malloc races with the
		// store that clears it but an atomic check in every malloc
		// would be a performance hit.
		// Instead we recheck it here on the non-preemptible system
		// stack to determine if we should perform an assist.

//
// This may return without performing this transition in some cases,
// such as when called on a system stack or with locks held.
func gcStart(trigger gcTrigger) {
	// Since this is called from malloc and malloc is called in
	// the guts of a number of libraries that might be holding
	// locks, don't attempt to start GC in non-preemptible or
	// potentially unstable situations.
	mp := acquirem()

		for p[0] != 0 {
			p = p[1:]
		}
		p = p[1:] // skip nil byte
	}

	stdcall1(_FreeEnvironmentStringsW, uintptr(strings))

	// We call these all the way here, late in init, so that malloc works
	// for the callback functions these generate.
	var fn any = ctrlHandler
	ctrlHandlerPC := compileCallback(*efaceOf(&fn), true)
	stdcall2(_SetConsoleCtrlHandler, ctrlHandlerPC, 1)

	monitorSuspendResume()

			"-Wno-unknown-warning-option",
			"-Wno-unneeded-internal-declaration",
			"-Wno-unused-function",
			"-Qunused-arguments",
			// Clang embeds prototypes for some builtin functions,
			// like malloc and calloc, but all size_t parameters are
			// incorrectly typed unsigned long. We work around that
			// by disabling the builtin functions (this is safe as
			// it won't affect the actual compilation of the C code).

			print(string(fmtNSAsMS(sbuf[:], uint64(end-start))), " ms clock, ")
			print(string(itoa(sbuf[:], after.bytes-before.bytes)), " bytes, ")
			print(string(itoa(sbuf[:], after.allocs-before.allocs)), " allocs")
			print("\n")
		}

		t.state = 2 // initialization done
	}

			// hchan locks. Normally, we only allow acquiring hchan
			// locks and then getting a gscan bit. In this case, we
			// already have the gscan bit. We allow acquiring hchan
			// locks here as a special case, since a deadlock can't
			// happen because the G involved must already be
			// suspended. So, we get a special hchan lock rank here
			// that is lower than gscan, but doesn't allow acquiring
			// any other locks other than hchan.