buf := make([]byte, 1024)
	for i := 0; i < b.N; i++ {
		var b Buffer
		b.Write(buf[0:1])
		for i := 0; i < 5<<10; i++ {
			b.Write(buf)
			b.Read(buf)
		}
	}
}

// Check that we don't compact too often. From Issue 5154.
func BenchmarkBufferFullSmallReads(b *testing.B) {
	buf := make([]byte, 1024)
	for i := 0; i < b.N; i++ {
		var b Buffer
		b.Write(buf)
		for b.Len()+20 < b.Cap() {

	XOR $1234567, R5, R3            // 6ca300126863d687
	XORIS $15, R3, R4               // 6c64000f
	XOR   $983040, R3, R4           // 6c64000f

	// TODO: the order of CR operands don't match
	CMP R3, R4                      // 7c232000
	CMPU R3, R4                     // 7c232040
	CMPW R3, R4                     // 7c032000
	CMPWU R3, R4                    // 7c032040

case func(int) float64:
	printFunction(i)                       // type of i is func(int) float64
case bool, string:
	printString("type is bool or string")  // type of i is type of x (interface{})
default:
	printString("don't know the type")     // type of i is type of x (interface{})
}
</pre>

<p>
could be rewritten:
</p>

<pre>
v := x  // x is evaluated exactly once
if v == nil {