tmp := make([]byte, 72)
	for _, growLen := range []int{0, 100, 1000, 10000, 100000} {
		for _, startLen := range []int{0, 100, 1000, 10000, 100000} {
			xBytes := Repeat(x, startLen)

			buf := NewBuffer(xBytes)
			// If we read, this affects buf.off, which is good to test.
			readBytes, _ := buf.Read(tmp)
			yBytes := Repeat(y, growLen)
			allocs := testing.AllocsPerRun(100, func() {
				buf.Grow(growLen)
				buf.Write(yBytes)

				v.sec, v.nsec, got, v.want)
		}
	}
}

func TestParsePAXRecord(t *testing.T) {
	medName := strings.Repeat("CD", 50)
	longName := strings.Repeat("AB", 100)

	vectors := []struct {
		in      string
		wantRes string
		wantKey string
		wantVal string
		ok      bool
	}{
		{"6 k=v\n\n", "\n", "k", "v", true},

	r := strings.NewReader("       foo       foo        42        42        42        42        42        42        42        42       4.2       4.2       4.2       4.2\n")
	buf := NewReader(r)
	allocs := testing.AllocsPerRun(100, func() {
		r.Seek(0, io.SeekStart)
		buf.Reset(r)

		_, err := buf.ReadString('\n')
		if err != nil {
			t.Fatal(err)
		}
	})
	if allocs != 1 {

	if in.peek {
		in.peek = false
		tok := in.peekToken
		in.text = in.peekText
		return tok
	}
	// If we cannot generate a token after 100 macro invocations, we're in trouble.
	// The usual case is caught by Push, below, but be safe.
	for nesting := 0; nesting < 100; {
		tok := in.Stack.Next()
		switch tok {
		case '#':
			if !in.beginningOfLine {
				in.Error("'#' must be first item on line")
			}

		"test.goCallback",
		"test._Cfunc_callback",
		"test.nestedCall.func1",
		"test.nestedCall",
		"test.testCallbackCallersSEH",
		"test.TestCallbackCallersSEH",
	}
	pc := make([]uintptr, 100)
	n := 0
	nestedCall(func() {
		n = int(C.backtrace(C.DWORD(len(pc)), (*C.PVOID)(unsafe.Pointer(&pc[0]))))
	})
	got := make([]string, 0, n)
	for i := 0; i < n; i++ {
		f := runtime.FuncForPC(pc[i] - 1)

</pre>

<p>
produces the same slice as allocating an array and <a href="#Slice_expressions">slicing</a>
it, so these two expressions are equivalent:
</p>

<pre>
make([]int, 50, 100)
new([100]int)[0:50]
</pre>

<p>
Like arrays, slices are always one-dimensional but may be composed to construct
higher-dimensional objects.

pkg syscall (windows-386), type RawSockaddrAny struct, Pad [100]int8
pkg syscall (windows-386), type RawSockaddrUnix struct, Family uint16
pkg syscall (windows-386), type RawSockaddrUnix struct, Path [108]int8
pkg syscall (windows-amd64), const UNIX_PATH_MAX = 108

// into Go.
func testCallbackCallers(t *testing.T) {
	if runtime.Compiler != "gc" {
		// The exact function names are not going to be the same.
		t.Skip("skipping for non-gc toolchain")
	}
	pc := make([]uintptr, 100)
	n := 0
	name := []string{
		"runtime.cgocallbackg1",
		"runtime.cgocallbackg",
		"runtime.cgocallback",
		"runtime.systemstack_switch",
		"runtime.cgocall",
		"test._Cfunc_callback",

pkg debug/elf, const R_PPC64_TPREL16_HIGHERA R_PPC64
pkg debug/elf, const R_PPC64_TPREL16_HIGHEST = 99
pkg debug/elf, const R_PPC64_TPREL16_HIGHEST R_PPC64
pkg debug/elf, const R_PPC64_TPREL16_HIGHESTA = 100
pkg debug/elf, const R_PPC64_TPREL16_HIGHESTA R_PPC64
pkg debug/elf, const R_PPC64_TPREL16_LO = 70
pkg debug/elf, const R_PPC64_TPREL16_LO R_PPC64
pkg debug/elf, const R_PPC64_TPREL16_LO_DS = 96

pkg syscall (netbsd-arm64-cgo), const IFT_VIRTUALTG ideal-int
pkg syscall (netbsd-arm64-cgo), const IFT_VOICEDID = 213
pkg syscall (netbsd-arm64-cgo), const IFT_VOICEDID ideal-int
pkg syscall (netbsd-arm64-cgo), const IFT_VOICEEM = 100
pkg syscall (netbsd-arm64-cgo), const IFT_VOICEEMFGD = 211
pkg syscall (netbsd-arm64-cgo), const IFT_VOICEEMFGD ideal-int
pkg syscall (netbsd-arm64-cgo), const IFT_VOICEEM ideal-int