diff --git a/bind/benchmarkpkg/benchmark.go b/bind/benchmarkpkg/benchmark.go
new file mode 100644
index 0000000..86873c0
--- /dev/null
+++ b/bind/benchmarkpkg/benchmark.go
@@ -0,0 +1,159 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin linux
+
+// Package benchmarkpkg contains functions for benchmarking bound functions.
+package benchmarkpkg
+
+import (
+	"log"
+	"time"
+)
+
+type Benchmarks interface {
+	// It seems to be much faster to call a native function from Java
+	// when there is already a native call earlier in the stack.
+	//
+	// Run runs a named benchmark from a different thread, with
+	// no native call prior in the stack.
+	Run(name string, n int)
+	// RunDirect runs a named benchmark directly, with the native
+	// context from the call itself.
+	RunDirect(name string, n int)
+
+	// Callbacks for Go benchmarks
+	NewI() I
+	Noargs()
+	Onearg(_ int)
+	Oneret() int
+	Ref(_ I)
+	Manyargs(_, _, _, _, _, _, _, _, _, _ int)
+	String(_ string)
+	Slice(_ []byte)
+}
+
+type (
+	I interface {
+		F()
+	}
+
+	AnI struct {
+	}
+)
+
+func (_ *AnI) F() {
+}
+
+func NewI() I {
+	return new(AnI)
+}
+
+func runBenchmark(name string, f func(n int)) {
+	// Run once for warmup
+	f(1)
+	n := 1000
+	var dt time.Duration
+	minDuration := 1 * time.Second
+	for dt < minDuration {
+		n *= 2
+		t0 := time.Now()
+		f(n)
+		dt = time.Since(t0)
+	}
+	log.Printf("Benchmark%s	%d	%d ns/op\n", name, n, dt.Nanoseconds()/int64(n))
+}
+
+func runGoBenchmark(name string, f func()) {
+	runBenchmark("Go"+name, func(n int) {
+		for i := 0; i < n; i++ {
+			f()
+		}
+	})
+	runBenchmark("Go"+name+"Direct", func(n int) {
+		done := make(chan struct{})
+		go func() {
+			for i := 0; i < n; i++ {
+				f()
+			}
+			close(done)
+		}()
+		<-done
+	})
+}
+
+func RunBenchmarks(b Benchmarks) {
+	names := []string{
+		"Empty",
+		"Noargs",
+		"Onearg",
+		"Oneret",
+		"Manyargs",
+		"Refjava",
+		"Refgo",
+		"StringShort",
+		"StringLong",
+		"StringShortUnicode",
+		"StringLongUnicode",
+		"SliceShort",
+		"SliceLong",
+	}
+	for _, name := range names {
+		runBenchmark("Java"+name, func(n int) {
+			b.Run(name, n)
+		})
+		runBenchmark("Java"+name+"Direct", func(n int) {
+			b.RunDirect(name, n)
+		})
+	}
+	runGoBenchmark("Empty", func() {})
+	runGoBenchmark("Noarg", func() { b.Noargs() })
+	runGoBenchmark("Onearg", func() { b.Onearg(0) })
+	runGoBenchmark("Oneret", func() { b.Oneret() })
+	javaRef := b.NewI()
+	runGoBenchmark("Refjava", func() { b.Ref(javaRef) })
+	goRef := NewI()
+	runGoBenchmark("Refgo", func() { b.Ref(goRef) })
+	runGoBenchmark("Manyargs", func() { b.Manyargs(0, 0, 0, 0, 0, 0, 0, 0, 0, 0) })
+	runGoBenchmark("StringShort", func() { b.String(ShortString) })
+	runGoBenchmark("StringLong", func() { b.String(LongString) })
+	runGoBenchmark("StringShortUnicode", func() { b.String(ShortStringUnicode) })
+	runGoBenchmark("StringLongUnicode", func() { b.String(LongStringUnicode) })
+	runGoBenchmark("SliceShort", func() { b.Slice(ShortSlice) })
+	runGoBenchmark("SliceLong", func() { b.Slice(LongSlice) })
+}
+
+func Noargs() {
+}
+
+func Onearg(_ int) {
+}
+
+func Manyargs(_, _, _, _, _, _, _, _, _, _ int) {
+}
+
+func Oneret() int {
+	return 0
+}
+
+func String(_ string) {
+}
+
+func Slice(_ []byte) {
+}
+
+func Ref(_ I) {
+}
+
+var (
+	ShortSlice = make([]byte, 10)
+	LongSlice  = make([]byte, 100000)
+)
+
+const (
+	ShortString        = "Hello, World!"
+	LongString         = "Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World!  Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World!  Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World!  Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World! Hello, World!, World!"
+	ShortStringUnicode = "Hello, 世界!"
+	LongStringUnicode  = "Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界!  Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界!  Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界!  Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界! Hello, 世界!, 世界!"
+)
diff --git a/bind/java/SeqBench.java b/bind/java/SeqBench.java
new file mode 100644
index 0000000..5930459
--- /dev/null
+++ b/bind/java/SeqBench.java
@@ -0,0 +1,146 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package go;
+
+import android.test.InstrumentationTestCase;
+import android.util.Log;
+
+import java.util.Map;
+import java.util.HashMap;
+
+import java.util.concurrent.Executors;
+import java.util.concurrent.ExecutorService;
+
+import go.benchmarkpkg.Benchmarkpkg;
+
+public class SeqBench extends InstrumentationTestCase {
+
+  public static class AnI extends Benchmarkpkg.I.Stub {
+    @Override public void F() {
+    }
+  }
+
+  private static class Benchmarks extends Benchmarkpkg.Benchmarks.Stub {
+    private static Map<String, Runnable> benchmarks;
+    private static ExecutorService executor = Executors.newSingleThreadExecutor();
+
+    static {
+      benchmarks = new HashMap<String, Runnable>();
+      benchmarks.put("Empty", new Runnable() {
+        @Override public void run() {
+        }
+      });
+      benchmarks.put("Noargs", new Runnable() {
+        @Override public void run() {
+          Benchmarkpkg.Noargs();
+        }
+      });
+      benchmarks.put("Onearg", new Runnable() {
+        @Override public void run() {
+          Benchmarkpkg.Onearg(0);
+        }
+      });
+      benchmarks.put("Manyargs", new Runnable() {
+        @Override public void run() {
+          Benchmarkpkg.Manyargs(0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
+        }
+      });
+      benchmarks.put("Oneret", new Runnable() {
+        @Override public void run() {
+          Benchmarkpkg.Oneret();
+        }
+      });
+      final Benchmarkpkg.I javaRef = new AnI();
+      benchmarks.put("Refjava", new Runnable() {
+        @Override public void run() {
+          Benchmarkpkg.Ref(javaRef);
+        }
+      });
+      final Benchmarkpkg.I goRef = Benchmarkpkg.NewI();
+      benchmarks.put("Refgo", new Runnable() {
+        @Override public void run() {
+          Benchmarkpkg.Ref(goRef);
+        }
+      });
+      benchmarks.put("StringShort", new Runnable() {
+        @Override public void run() {
+          Benchmarkpkg.String(Benchmarkpkg.ShortString);
+        }
+      });
+      benchmarks.put("StringLong", new Runnable() {
+        @Override public void run() {
+          Benchmarkpkg.String(Benchmarkpkg.LongString);
+        }
+      });
+      benchmarks.put("StringShortUnicode", new Runnable() {
+        @Override public void run() {
+          Benchmarkpkg.String(Benchmarkpkg.ShortStringUnicode);
+        }
+      });
+      benchmarks.put("StringLongUnicode", new Runnable() {
+        @Override public void run() {
+          Benchmarkpkg.String(Benchmarkpkg.LongStringUnicode);
+        }
+      });
+      final byte[] shortSlice = Benchmarkpkg.getShortSlice();
+      benchmarks.put("SliceShort", new Runnable() {
+        @Override public void run() {
+          Benchmarkpkg.Slice(shortSlice);
+        }
+      });
+      final byte[] longSlice = Benchmarkpkg.getLongSlice();
+      benchmarks.put("SliceLong", new Runnable() {
+        @Override public void run() {
+          Benchmarkpkg.Slice(longSlice);
+        }
+      });
+    }
+
+    public void RunDirect(String name, final long n) {
+      final Runnable r = benchmarks.get(name);
+      try {
+        executor.submit(new Runnable() {
+          @Override public void run() {
+            for (int i = 0; i < n; i++) {
+              r.run();
+            }
+          }
+        }).get();
+      } catch (Exception e) {
+        throw new RuntimeException(e);
+      }
+    }
+
+    public void Run(String name, long n) {
+      final Runnable r = benchmarks.get(name);
+      for (int i = 0; i < n; i++) {
+        r.run();
+      }
+    }
+
+    @Override public Benchmarkpkg.I NewI() {
+      return new AnI();
+    }
+    @Override public void Ref(Benchmarkpkg.I i) {
+    }
+    @Override public void Noargs() {
+    }
+    @Override public void Onearg(long i) {
+    }
+    @Override public long Oneret() {
+      return 0;
+    }
+    @Override public void Manyargs(long p0, long p1, long p2, long p3, long p4, long p5, long p6, long p7, long gp8, long p9) {
+    }
+    @Override public void String(String s) {
+    }
+    @Override public void Slice(byte[] s) {
+    }
+  }
+
+  public void testBenchmark() {
+    Benchmarkpkg.RunBenchmarks(new Benchmarks());
+  }
+}
diff --git a/bind/java/seq_test.go b/bind/java/seq_test.go
index 646ec46..7006cdf 100644
--- a/bind/java/seq_test.go
+++ b/bind/java/seq_test.go
@@ -19,6 +19,24 @@ import (
 // This requires the gradle command in PATH and
 // the Android SDK whose path is available through ANDROID_HOME environment variable.
 func TestJavaSeqTest(t *testing.T) {
+	runTest(t, "golang.org/x/mobile/bind/java/testpkg", "SeqTest")
+}
+
+// TestJavaSeqBench runs java test SeqBench.java, with the same
+// environment requirements as TestJavaSeqTest.
+//
+// The benchmarks runs on the phone, so the benchmarkpkg implements
+// rudimentary timing logic and outputs benchcmp compatible runtimes
+// to logcat. Use
+//
+// adb logcat -v raw GoLog:* *:S
+//
+// while running the benchmark to see the results.
+func TestJavaSeqBench(t *testing.T) {
+	runTest(t, "golang.org/x/mobile/bind/benchmarkpkg", "SeqBench")
+}
+
+func runTest(t *testing.T, pkgName, javaCls string) {
 	if _, err := run("which gradle"); err != nil {
 		t.Skip("command gradle not found, skipping")
 	}
@@ -57,20 +75,20 @@ func TestJavaSeqTest(t *testing.T) {
 		}
 	}
 
-	buf, err := run("gomobile bind golang.org/x/mobile/bind/java/testpkg")
+	buf, err := run("gomobile bind -o pkg.aar " + pkgName)
 	if err != nil {
 		t.Logf("%s", buf)
 		t.Fatalf("failed to run gomobile bind: %v", err)
 	}
 
-	fname := filepath.Join(tmpdir, "libs", "testpkg.aar")
-	err = cp(fname, filepath.Join(tmpdir, "testpkg.aar"))
+	fname := filepath.Join(tmpdir, "libs", "pkg.aar")
+	err = cp(fname, filepath.Join(tmpdir, "pkg.aar"))
 	if err != nil {
-		t.Fatalf("failed to copy testpkg.aar: %v", err)
+		t.Fatalf("failed to copy pkg.aar: %v", err)
 	}
 
-	fname = filepath.Join(tmpdir, "src/androidTest/java/go/SeqTest.java")
-	err = cp(fname, filepath.Join(cwd, "SeqTest.java"))
+	fname = filepath.Join(tmpdir, "src/androidTest/java/go/"+javaCls+".java")
+	err = cp(fname, filepath.Join(cwd, javaCls+".java"))
 	if err != nil {
 		t.Fatalf("failed to copy SeqTest.java: %v", err)
 	}
@@ -149,6 +167,6 @@ repositories {
 }
 dependencies {
     compile 'com.android.support:appcompat-v7:19.0.0'
-    compile(name: "testpkg", ext: "aar")
+    compile(name: "pkg", ext: "aar")
 }
 `