Class<? extends Script> scriptBaseClass, Action<? super ClassNode> verifier
    ) {
        Timer clock = Time.startTimer();
        try {
            deleter.ensureEmptyDirectory(classesDir);
        } catch (IOException ioex) {
            throw new UncheckedIOException(ioex);
        }

	b.ReportAllocs()
	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		b.StopTimer()
		err := CopyFS(tmpDir, DirFS("."))
		if err != nil {
			b.Fatal(err)
		}
		b.StartTimer()
		if err := RemoveAll(tmpDir); err != nil {
			b.Fatal(err)
		}
	}

//
// If a benchmark needs some expensive setup before running, the timer
// may be stopped:
//     func BenchmarkBigLen(b *testing.B) {
//         b.StopTimer()
//         big := NewBig()
//         b.StartTimer()
//         for i := 0; i < b.N; i++ {
//             big.Len()
//         }
//     }
package testing

import (
	"flag"
	"fmt"
	"os"
	"runtime"
	"runtime/pprof"
	"strconv"
	"strings"

	for i := 0; i < b.N; i++ {
		buf := bytes.NewBuffer(ints)
		b.StartTimer()
		scanInts(&r, buf)
		b.StopTimer()
	}
}

func BenchmarkScanRecursiveInt(b *testing.B) {
	b.StopTimer()
	ints := makeInts(intCount)
	var r RecursiveInt
	for i := 0; i < b.N; i++ {
		buf := bytes.NewBuffer(ints)
		b.StartTimer()
		Fscan(buf, &r)
		b.StopTimer()
	}
}

		c, err := net.Dial("tcp", ln.Addr().String())
		if err != nil {
			<-done
			b.Fatalf("Dial failed: %v", err)
		}
		clients[p] = c
	}
	if !<-done {
		b.FailNow()
	}

	b.StartTimer()

	var wg sync.WaitGroup
	wg.Add(4 * P)
	for p := 0; p < P; p++ {
		// Client writer.
		go func(c net.Conn) {
			defer wg.Done()
			var buf [1]byte
			for i := 0; i < N; i++ {
				v := byte(i)

		}
	}
}

func BenchmarkScan(b *testing.B) {
	b.StopTimer()
	fset := token.NewFileSet()
	file := fset.AddFile("", fset.Base(), len(source))
	var s Scanner
	b.StartTimer()
	for i := 0; i < b.N; i++ {
		s.Init(file, source, nil, ScanComments)
		for {
			_, tok, _ := s.Scan()
			if tok == token.EOF {
				break
			}
		}
	}
}

		}
	}
	bytes := 0
	for _, r := range m {
		bytes += len(r.GetResource().Value)
	}
	b.ReportMetric(float64(bytes)/1000, "kb/msg")
	b.ReportMetric(float64(len(m)), "resources/msg")
	b.StartTimer()
}

func createEndpointsConfig(numEndpoints, numServices, numNetworks int) []config.Config {
	result := make([]config.Config, 0, numServices)
	for s := 0; s < numServices; s++ {

		}
		done <- true
	}()
	for p := 0; p < P; p++ {
		c, err := Dial("tcp", ln.Addr().String())
		if err != nil {
			b.Fatal(err)
		}
		clients[p] = c
	}
	<-done

	b.StartTimer()

	var wg sync.WaitGroup
	wg.Add(4 * P)
	for p := 0; p < P; p++ {
		// Client writer.
		go func(c Conn) {
			defer wg.Done()
			var buf [1]byte
			for i := 0; i < N; i++ {
				v := byte(i)

	for j := 0; j < 10; j++ {
		ready.Add(1)
		go func() {
			x := 100000
			countpwg(&x, &ready, teardown)
		}()
	}
	ready.Wait()
	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		b.StartTimer()
		runtime.GC()
		runtime.GC()
		b.StopTimer()
	}
	close(teardown)
}

func BenchmarkMSpanCountAlloc(b *testing.B) {
	// Allocate one dummy mspan for the whole benchmark.

	b.StopTimer()
	// matmult is O(N**3) but testing expects O(b.N),
	// so we need to take cube root of b.N
	n := int(math.Cbrt(float64(b.N))) + 1
	A := makeMatrix(n)
	B := makeMatrix(n)
	C := makeMatrix(n)
	b.StartTimer()
	matmult(nil, A, B, C, 0, n, 0, n, 0, n, 8)
}

func makeMatrix(n int) Matrix {
	m := make(Matrix, n)
	for i := 0; i < n; i++ {
		m[i] = make([]float64, n)
		for j := 0; j < n; j++ {