Introduce perf tests for background text layout performance
Here is an example of perf score:
StaticLayout creation time
1 Thread: 7,301,172
2 Thread: 13,842,641
4 Thread: 25,232,063
Bug: 37567215
Test: See above
Change-Id: I319abd5fe0861575649a1122c91f1949c6ad14d2
diff --git a/apct-tests/perftests/core/src/android/text/StaticLayoutMultithreadPerfTest.java b/apct-tests/perftests/core/src/android/text/StaticLayoutMultithreadPerfTest.java
new file mode 100644
index 0000000..60c6d89
--- /dev/null
+++ b/apct-tests/perftests/core/src/android/text/StaticLayoutMultithreadPerfTest.java
@@ -0,0 +1,134 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package android.text;
+
+import android.perftests.utils.BenchmarkState;
+import android.perftests.utils.PerfStatusReporter;
+
+import android.support.test.filters.LargeTest;
+import android.support.test.runner.AndroidJUnit4;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.util.Random;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.TimeUnit;
+
+@LargeTest
+@RunWith(AndroidJUnit4.class)
+public class StaticLayoutMultithreadPerfTest {
+ private static final int WORD_LENGTH = 9; // Random word has 9 characters.
+ private static final int WORDS_IN_LINE = 8; // Roughly, 8 words in a line.
+ private static final boolean NO_STYLE_TEXT = false;
+
+ private static TextPaint PAINT = new TextPaint();
+ private static final int TEXT_WIDTH = WORDS_IN_LINE * WORD_LENGTH * (int) PAINT.getTextSize();
+
+ public StaticLayoutMultithreadPerfTest() {}
+
+ @Rule
+ public PerfStatusReporter mPerfStatusReporter = new PerfStatusReporter();
+
+ private CountDownLatch mStartLatch;
+ private AtomicBoolean mThreadState; // True for running, False for stopped.
+
+ private static final long TIMEOUT_MS = 5000;
+
+ private Thread[] startBackgroundThread(int numOfThreads) {
+ mStartLatch = new CountDownLatch(numOfThreads);
+ mThreadState = new AtomicBoolean(true);
+
+ Thread[] threads = new Thread[numOfThreads];
+ for (int i = 0; i < numOfThreads; ++i) {
+ final int seed = i + 1;
+ threads[i] = new Thread(new Runnable() {
+ @Override
+ public void run() {
+ final TextPerfUtils util = new TextPerfUtils();
+ util.resetRandom(seed);
+
+ mStartLatch.countDown();
+ while (mThreadState.get()) {
+ final CharSequence text = util.nextRandomParagraph(
+ WORD_LENGTH, NO_STYLE_TEXT);
+ StaticLayout.Builder.obtain(text, 0, text.length(), PAINT, TEXT_WIDTH)
+ .build();
+ }
+ }
+ });
+ }
+
+ for (int i = 0; i < numOfThreads; ++i) {
+ threads[i].start();
+ }
+
+ try {
+ mStartLatch.await(TIMEOUT_MS, TimeUnit.MILLISECONDS);
+ } catch (InterruptedException e) {
+ throw new RuntimeException(e);
+ }
+ return threads;
+ }
+
+ private void finishThreads(Thread[] threads) {
+ mThreadState.set(false);
+ for (Thread thread : threads) {
+ try {
+ thread.join();
+ } catch (InterruptedException e) {
+ throw new RuntimeException(e);
+ }
+ }
+ mStartLatch = null;
+ mThreadState = null;
+ }
+
+ private void runRandomTest(int numOfTotalThreads) {
+ final BenchmarkState state = mPerfStatusReporter.getBenchmarkState();
+ final TextPerfUtils util = new TextPerfUtils();
+ Thread[] threads = startBackgroundThread(numOfTotalThreads - 1);
+ while (state.keepRunning()) {
+ state.pauseTiming();
+ final CharSequence text = util.nextRandomParagraph(WORD_LENGTH, NO_STYLE_TEXT);
+ state.resumeTiming();
+
+ StaticLayout.Builder.obtain(text, 0, text.length(), PAINT, TEXT_WIDTH)
+ .setHyphenationFrequency(Layout.HYPHENATION_FREQUENCY_NONE)
+ .setBreakStrategy(Layout.BREAK_STRATEGY_SIMPLE)
+ .build();
+ }
+ finishThreads(threads);
+ }
+
+ @Test
+ public void testCreate_RandomText_Thread_1() {
+ runRandomTest(1);
+ }
+
+ @Test
+ public void testCreate_RandomText_Thread_2() {
+ runRandomTest(2);
+ }
+
+ @Test
+ public void testCreate_RandomText_Thread_4() {
+ runRandomTest(4);
+ }
+}