Merge "Benchmarks for Linkify" into nyc-dev

/*

 * 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);

        }

    }

}