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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "base/android/jni_android.h" | |
| 6 | |
| 7 #include "base/at_exit.h" | |
| 8 #include "base/logging.h" | |
| 9 #include "testing/gtest/include/gtest/gtest.h" | |
| 10 | |
| 11 namespace base { | |
| 12 namespace android { | |
| 13 | |
| 14 namespace { | |
| 15 | |
| 16 base::subtle::AtomicWord g_atomic_id = 0; | |
| 17 int LazyMethodIDCall(JNIEnv* env, jclass clazz, int p) { | |
| 18 jmethodID id = base::android::MethodID::LazyGet< | |
| 19 base::android::MethodID::TYPE_STATIC>( | |
| 20 env, clazz, | |
| 21 "abs", | |
| 22 "(I)I", | |
| 23 &g_atomic_id); | |
| 24 | |
| 25 return env->CallStaticIntMethod(clazz, id, p); | |
| 26 } | |
| 27 | |
| 28 int MethodIDCall(JNIEnv* env, jclass clazz, jmethodID id, int p) { | |
| 29 return env->CallStaticIntMethod(clazz, id, p); | |
| 30 } | |
| 31 | |
| 32 } // namespace | |
| 33 | |
| 34 TEST(JNIAndroidMicrobenchmark, MethodId) { | |
| 35 JNIEnv* env = AttachCurrentThread(); | |
| 36 ScopedJavaLocalRef<jclass> clazz(GetClass(env, "java/lang/Math")); | |
| 37 base::Time start_lazy = base::Time::Now(); | |
| 38 int o = 0; | |
| 39 for (int i = 0; i < 1024; ++i) | |
| 40 o += LazyMethodIDCall(env, clazz.obj(), i); | |
| 41 base::Time end_lazy = base::Time::Now(); | |
| 42 | |
| 43 jmethodID id = reinterpret_cast<jmethodID>(g_atomic_id); | |
| 44 base::Time start = base::Time::Now(); | |
| 45 for (int i = 0; i < 1024; ++i) | |
| 46 o += MethodIDCall(env, clazz.obj(), id, i); | |
| 47 base::Time end = base::Time::Now(); | |
| 48 | |
| 49 // On a Galaxy Nexus, results were in the range of: | |
| 50 // JNI LazyMethodIDCall (us) 1984 | |
| 51 // JNI MethodIDCall (us) 1861 | |
| 52 LOG(ERROR) << "JNI LazyMethodIDCall (us) " << | |
| 53 base::TimeDelta(end_lazy - start_lazy).InMicroseconds(); | |
| 54 LOG(ERROR) << "JNI MethodIDCall (us) " << | |
| 55 base::TimeDelta(end - start).InMicroseconds(); | |
| 56 LOG(ERROR) << "JNI " << o; | |
| 57 } | |
| 58 | |
| 59 | |
| 60 } // namespace android | |
| 61 } // namespace base | |
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