GeezerVison is showing github.com — Java/ConvertInputStreamToStringBenchmark.java at main · Eggy115/Java

Expand file tree

ConvertInputStreamToStringBenchmark.java

Copy path

More file actions

Latest commit

History

210 lines (187 loc) · 8.14 KB

ConvertInputStreamToStringBenchmark.java

Copy path

File metadata and controls

210 lines (187 loc) · 8.14 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

package other_examples;

import com.google.common.base.Charsets;

import com.google.common.io.CharStreams;

import org.apache.commons.io.IOUtils;

import org.openjdk.jmh.annotations.*;

import org.openjdk.jmh.runner.Runner;

import org.openjdk.jmh.runner.options.Options;

import org.openjdk.jmh.runner.options.OptionsBuilder;

import java.io.*;

import java.nio.charset.StandardCharsets;

import java.util.Scanner;

import java.util.concurrent.TimeUnit;

import java.util.stream.Collectors;

/**

* Created by vvedenin on 2/15/2016.

@BenchmarkMode(Mode.AverageTime)

@OutputTimeUnit(TimeUnit.MICROSECONDS)

@Warmup(iterations = 2, time = 1, timeUnit = TimeUnit.SECONDS)

@Measurement(iterations = 3, time = 1, timeUnit = TimeUnit.SECONDS)

@Fork(1)

@State(Scope.Benchmark)

public class ConvertInputStreamToStringBenchmark {

private final static String test1 = "test1847686128764812764876128пввпв76417826487216478216784621784672816478216784621784621786478216478216784261784621"+ "\n\r" +"782178647281647821647821697421687126784621874621786478216478216874";

private final static InputStream inputStream = IOUtils.toInputStream(test1, StandardCharsets.UTF_8);

/* 1. Using IOUtils.toString (Apache Utils) */

@Benchmark

public String test1_apacheToInputStream() throws IOException {

mark();

String result = IOUtils.toString(inputStream, StandardCharsets.UTF_8);

reset();

return result;

}

/* 2. Using CharStreams (guava) */

@Benchmark

public String test2_guavaCharStreams() throws IOException {

mark();

String result = CharStreams.toString(new InputStreamReader(inputStream, Charsets.UTF_8));

inputStream.reset();

return result;

}

/* 3. Using Scanner (JDK) */

@Benchmark

public String test3_jdkScanner() throws IOException {

mark();

Scanner s = new Scanner(inputStream).useDelimiter("\\A");

String result = s.hasNext() ? s.next() : "";

reset();

return result;

}

/* 4. Using Stream Api (Java 8) */

@Benchmark

public String test4_jdkJava8() throws IOException {

mark();

String result = new BufferedReader(new InputStreamReader(inputStream)).lines().collect(Collectors.joining("\n"));

reset();

return result;

}

/* 5. Using parallel Stream Api (Java 8) */

@Benchmark

public String test5_jdkJava8parallel() throws IOException {

mark();

String result = new BufferedReader(new InputStreamReader(inputStream)).lines().parallel().collect(Collectors.joining("\n"));

reset();

return result;

}

/* 6. Using InputStreamReader and StringBuilder (JDK) */

@Benchmark

public String test6_inputStreamReaderAndStringBuilder() throws IOException {

mark();

final int bufferSize = 1024;

final char[] buffer = new char[bufferSize];

final StringBuilder out = new StringBuilder();

Reader in = new InputStreamReader(inputStream, "UTF-8");

for (; ; ) {

int rsz = in.read(buffer, 0, buffer.length);

if (rsz < 0)

break;

out.append(buffer, 0, rsz);

}

reset();

return out.toString();

}

/* 7. Using StringWriter and IOUtils.copy (Apache Commons)*/

@Benchmark

public String test7_apacheStringWriterAndIOUtilsCopy() throws IOException {

mark();

StringWriter writer = new StringWriter();

IOUtils.copy(inputStream, writer, "UTF-8");

reset();

return writer.toString();

}

/* 8. Using ByteArrayOutputStream and inputStream.read (JDK) */

@Benchmark

public String test8_readByteArrayOutputStream() throws IOException {

mark();

ByteArrayOutputStream result = new ByteArrayOutputStream();

byte[] buffer = new byte[1024];

int length;

while ((length = inputStream.read(buffer)) != -1) {

result.write(buffer, 0, length);

}

reset();

return result.toString("UTF-8");

}

/* 9. Using BufferedReader (JDK) */

@Benchmark

public String test9_bufferedReaderReadLine() throws IOException {

mark();

String newLine = System.getProperty("line.separator");

BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));

StringBuilder result = new StringBuilder();

String line; boolean flag = false;

while ((line = reader.readLine()) != null) {

result.append(flag? newLine: "").append(line);

flag = true;

}

reset();

return result.toString();

}

/* 10. Using BufferedInputStream and ByteArrayOutputStream (JDK) */

@Benchmark

public String test10_bufferedInputStreamAndByteArrayOutputStream() throws IOException {

mark();

BufferedInputStream bis = new BufferedInputStream(inputStream);

ByteArrayOutputStream buf = new ByteArrayOutputStream();

int result = bis.read();

while(result != -1) {

buf.write((byte) result);

result = bis.read();

}

reset();

return buf.toString();

}

/* 11. Using inputStream.read() and StringBuilder (JDK) */

@Benchmark

public String test11_inputStreamReadAndStringBuilder() throws IOException {

mark();

int ch;

StringBuilder sb = new StringBuilder();

while((ch = inputStream.read()) != -1)

sb.append((char)ch);

reset();

return sb.toString();

}

/* 12. Using BufferedReader (JDK) */

@Benchmark

public String test12_bufferedReaderReadLine2() throws IOException {

mark();

String newLine = System.getProperty("line.separator");

BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));

StringBuilder result = new StringBuilder();

String line;

while ((line = reader.readLine()) != null) {

result.append(newLine).append(line);

}

reset();

return result.toString().trim();

}

private void reset() throws IOException {

inputStream.reset();

}

private void mark() {

inputStream.mark(0);

}

public static void main(String[] args) throws Exception {

ConvertInputStreamToStringBenchmark test = new ConvertInputStreamToStringBenchmark();

System.out.println();

System.out.println("1. apacheToInputStream : " + test.test1_apacheToInputStream().length());

System.out.println("2. guavaCharStreams : " + test.test2_guavaCharStreams().length());

System.out.println("3. jdkScanner : " + test.test3_jdkScanner().length());

System.out.println("4. jdkJava8 : " + test.test4_jdkJava8().length());

System.out.println("5. jdkJava8parallel : " + test.test5_jdkJava8parallel().length());

System.out.println("6. inputStreamReaderAndStringBuilder : " + test.test6_inputStreamReaderAndStringBuilder().length());

System.out.println("7. apacheStringWriterAndIOUtilsCopy : " + test.test7_apacheStringWriterAndIOUtilsCopy().length());

System.out.println("8. readByteArrayOutputStream : " + test.test8_readByteArrayOutputStream().length());

System.out.println("9. bufferedReaderReadLine : " + test.test9_bufferedReaderReadLine().length());

System.out.println("10. bufferedInputStreamAndByteArrayOutputStream : " + test.test10_bufferedInputStreamAndByteArrayOutputStream().length());

System.out.println("11. inputStreamReadAndStringBuilder : " + test.test11_inputStreamReadAndStringBuilder().length());

System.out.println("12. test12_bufferedReaderReadLine2 : " + test.test12_bufferedReaderReadLine2().length());

System.out.println();

Options opt = new OptionsBuilder()

.include(ConvertInputStreamToStringBenchmark.class.getSimpleName())

.build();

new Runner(opt).run();

}