Benchmarks for Linkify

Add benchmarks for Linkify and URL regular expressions.

Bug: 27921706
Change-Id: I61dcd090bdf877f2df77e898c8a0f441de1dc45a

diff --git a/core/tests/benchmarks/src/android/text/util/LinkifyBenchmark.java b/core/tests/benchmarks/src/android/text/util/LinkifyBenchmark.java
new file mode 100644 (file)
index 0000000..a6e433f
--- /dev/null
+++ b/core/tests/benchmarks/src/android/text/util/LinkifyBenchmark.java
@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2016 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.util;
+
+import com.google.caliper.AfterExperiment;
+import com.google.caliper.BeforeExperiment;
+import com.google.caliper.Benchmark;
+import com.google.caliper.Param;
+
+import android.text.Spannable;
+import android.text.SpannableString;
+import android.util.Patterns;
+
+import java.util.regex.Pattern;
+
+public class LinkifyBenchmark {
+    private static final String MATCHING_STR = " http://user:pass@host.com:5432/path?k=v#f " +
+            "host.com:5432/path?k=v#f ";
+
+    private static final String NONMATCHING_STR = " Neque porro quisquam est qui dolorem ipsum " +
+            "quia dolor sit amet, consectetur, adipisci velit ";
+
+    // this pattern does not recognize strings without http scheme therefore is expected to be
+    // faster in MATCHING_STR case.
+    private static final Pattern BASIC_PATTERN = Pattern.compile(
+            "(?:\\b|$|^)http://[a-zA-Z0-9:\\.@\\?=#/]+(?:\\b|$|^)");
+
+    @Param({"1", "4", "16", "64", "256"})
+    private String mParamCopyAmount;
+
+    @Param({MATCHING_STR, NONMATCHING_STR})
+    private String mParamBasicText;
+
+    private Spannable mTestSpannable;
+
+    @BeforeExperiment
+    protected void setUp() throws Exception {
+        int copyAmount = Integer.valueOf(mParamCopyAmount);
+        StringBuilder strBuilder = new StringBuilder();
+        for (int i = 0; i < copyAmount; i++) {
+            strBuilder.append(mParamBasicText);
+        }
+        mTestSpannable = new SpannableString(strBuilder.toString());
+    }
+
+    @AfterExperiment
+    protected void tearDown() {
+        mTestSpannable = null;
+    }
+
+    @Benchmark
+    public void timeNewRegEx(int reps) throws Exception {
+        for (int i = 0; i < reps; i++) {
+            Linkify.addLinks(mTestSpannable, Patterns.AUTOLINK_WEB_URL, "http://",
+                    new String[]{"http://", "https://", "rtsp://"}, null, null);
+        }
+    }
+
+    @Benchmark
+    public void timeOldRegEx(int reps) throws Exception {
+        for (int i = 0; i < reps; i++) {
+            Linkify.addLinks(mTestSpannable, Patterns.WEB_URL, "http://",
+                    new String[]{"http://", "https://", "rtsp://"}, null, null);
+        }
+    }
+
+    @Benchmark
+    public void timeBasicRegEx(int reps) throws Exception {
+        for (int i = 0; i < reps; i++) {
+            Linkify.addLinks(mTestSpannable, BASIC_PATTERN, "http://",
+                    new String[]{"http://", "https://", "rtsp://"}, null, null);
+        }
+    }
+
+}