src/third_party/protobuf/benchmarks/ProtoBench.java - cobalt - Git at Google

 // Protocol Buffers - Google's data interchange format
 // Copyright 2009 Google Inc.  All rights reserved.
 // https://developers.google.com/protocol-buffers/
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 // copyright notice, this list of conditions and the following disclaimer
 // in the documentation and/or other materials provided with the
 // distribution.
 //     * Neither the name of Google Inc. nor the names of its
 // contributors may be used to endorse or promote products derived from
 // this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 package com.google.protocolbuffers;

 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.RandomAccessFile;
 import java.lang.reflect.Method;

 import com.google.protobuf.ByteString;
 import com.google.protobuf.CodedInputStream;
 import com.google.protobuf.CodedOutputStream;
 import com.google.protobuf.Message;

 public class ProtoBench {

   private static final long MIN_SAMPLE_TIME_MS = 2 * 1000;
   private static final long TARGET_TIME_MS = 30 * 1000;

   private ProtoBench() {
     // Prevent instantiation
   }

   public static void main(String[] args) {
     if (args.length < 2 || (args.length % 2) != 0) {
       System.err.println("Usage: ProtoBench <descriptor type name> <input data>");
       System.err.println("The descriptor type name is the fully-qualified message name,");
       System.err.println("e.g. com.google.protocolbuffers.benchmark.Message1");
       System.err.println("(You can specify multiple pairs of descriptor type name and input data.)");
       System.exit(1);
     }
     boolean success = true;
     for (int i = 0; i < args.length; i += 2) {
       success &= runTest(args[i], args[i + 1]);
     }
     System.exit(success ? 0 : 1);
   }

   /**
    * Runs a single test. Error messages are displayed to stderr, and the return value
    * indicates general success/failure.
    */
   public static boolean runTest(String type, String file) {
     System.out.println("Benchmarking " + type + " with file " + file);
     final Message defaultMessage;
     try {
       Class<?> clazz = Class.forName(type);
       Method method = clazz.getDeclaredMethod("getDefaultInstance");
       defaultMessage = (Message) method.invoke(null);
     } catch (Exception e) {
       // We want to do the same thing with all exceptions. Not generally nice,
       // but this is slightly different.
       System.err.println("Unable to get default message for " + type);
       return false;
     }

     try {
       final byte[] inputData = readAllBytes(file);
       final ByteArrayInputStream inputStream = new ByteArrayInputStream(inputData);
       final ByteString inputString = ByteString.copyFrom(inputData);
       final Message sampleMessage = defaultMessage.newBuilderForType().mergeFrom(inputString).build();
       FileOutputStream devNullTemp = null;
       CodedOutputStream reuseDevNullTemp = null;
       try {
         devNullTemp = new FileOutputStream("/dev/null");
         reuseDevNullTemp = CodedOutputStream.newInstance(devNullTemp);
       } catch (FileNotFoundException e) {
         // ignore: this is probably Windows, where /dev/null does not exist
       }
       final FileOutputStream devNull = devNullTemp;
       final CodedOutputStream reuseDevNull = reuseDevNullTemp;
       benchmark("Serialize to byte string", inputData.length, new Action() {
         public void execute() { sampleMessage.toByteString(); }
       });
       benchmark("Serialize to byte array", inputData.length, new Action() {
         public void execute() { sampleMessage.toByteArray(); }
       });
       benchmark("Serialize to memory stream", inputData.length, new Action() {
         public void execute() throws IOException {
           sampleMessage.writeTo(new ByteArrayOutputStream());
         }
       });
       if (devNull != null) {
         benchmark("Serialize to /dev/null with FileOutputStream", inputData.length, new Action() {
           public void execute() throws IOException {
             sampleMessage.writeTo(devNull);
           }
         });
         benchmark("Serialize to /dev/null reusing FileOutputStream", inputData.length, new Action() {
           public void execute() throws IOException {
             sampleMessage.writeTo(reuseDevNull);
             reuseDevNull.flush();  // force the write to the OutputStream
           }
         });
       }
       benchmark("Deserialize from byte string", inputData.length, new Action() {
         public void execute() throws IOException {
           defaultMessage.newBuilderForType().mergeFrom(inputString).build();
         }
       });
       benchmark("Deserialize from byte array", inputData.length, new Action() {
         public void execute() throws IOException {
           defaultMessage.newBuilderForType()
             .mergeFrom(CodedInputStream.newInstance(inputData)).build();
         }
       });
       benchmark("Deserialize from memory stream", inputData.length, new Action() {
         public void execute() throws IOException {
           defaultMessage.newBuilderForType()
             .mergeFrom(CodedInputStream.newInstance(inputStream)).build();
           inputStream.reset();
         }
       });
       System.out.println();
       return true;
     } catch (Exception e) {
       System.err.println("Error: " + e.getMessage());
       System.err.println("Detailed exception information:");
       e.printStackTrace(System.err);
       return false;
     }
   }

   private static void benchmark(String name, long dataSize, Action action) throws IOException {
     // Make sure it's JITted "reasonably" hard before running the first progress test
     for (int i=0; i < 100; i++) {
       action.execute();
     }

     // Run it progressively more times until we've got a reasonable sample
     int iterations = 1;
     long elapsed = timeAction(action, iterations);
     while (elapsed < MIN_SAMPLE_TIME_MS) {
       iterations *= 2;
       elapsed = timeAction(action, iterations);
     }

     // Upscale the sample to the target time. Do this in floating point arithmetic
     // to avoid overflow issues.
     iterations = (int) ((TARGET_TIME_MS / (double) elapsed) * iterations);
     elapsed = timeAction(action, iterations);
     System.out.println(name + ": " + iterations + " iterations in "
          + (elapsed/1000f) + "s; "
          + (iterations * dataSize) / (elapsed * 1024 * 1024 / 1000f)
          + "MB/s");
   }

   private static long timeAction(Action action, int iterations) throws IOException {
     System.gc();
     long start = System.currentTimeMillis();
     for (int i = 0; i < iterations; i++) {
       action.execute();
     }
     long end = System.currentTimeMillis();
     return end - start;
   }

   private static byte[] readAllBytes(String filename) throws IOException {
     RandomAccessFile file = new RandomAccessFile(new File(filename), "r");
     byte[] content = new byte[(int) file.length()];
     file.readFully(content);
     return content;
   }

   /**
    * Interface used to capture a single action to benchmark.
    */
   interface Action {
     void execute() throws IOException;
   }
 }
	// Protocol Buffers - Google's data interchange format
	// Copyright 2009 Google Inc. All rights reserved.
	// https://developers.google.com/protocol-buffers/
	//
	// Redistribution and use in source and binary forms, with or without
	// modification, are permitted provided that the following conditions are
	// met:
	//
	// * Redistributions of source code must retain the above copyright
	// notice, this list of conditions and the following disclaimer.
	// * Redistributions in binary form must reproduce the above
	// copyright notice, this list of conditions and the following disclaimer
	// in the documentation and/or other materials provided with the
	// distribution.
	// * Neither the name of Google Inc. nor the names of its
	// contributors may be used to endorse or promote products derived from
	// this software without specific prior written permission.
	//
	// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

	package com.google.protocolbuffers;

	import java.io.ByteArrayInputStream;
	import java.io.ByteArrayOutputStream;
	import java.io.File;
	import java.io.FileOutputStream;
	import java.io.FileNotFoundException;
	import java.io.IOException;
	import java.io.RandomAccessFile;
	import java.lang.reflect.Method;

	import com.google.protobuf.ByteString;
	import com.google.protobuf.CodedInputStream;
	import com.google.protobuf.CodedOutputStream;
	import com.google.protobuf.Message;

	public class ProtoBench {

	private static final long MIN_SAMPLE_TIME_MS = 2 * 1000;
	private static final long TARGET_TIME_MS = 30 * 1000;

	private ProtoBench() {
	// Prevent instantiation
	}

	public static void main(String[] args) {
	if (args.length < 2 \|\| (args.length % 2) != 0) {
	System.err.println("Usage: ProtoBench <descriptor type name> <input data>");
	System.err.println("The descriptor type name is the fully-qualified message name,");
	System.err.println("e.g. com.google.protocolbuffers.benchmark.Message1");
	System.err.println("(You can specify multiple pairs of descriptor type name and input data.)");
	System.exit(1);
	}
	boolean success = true;
	for (int i = 0; i < args.length; i += 2) {
	success &= runTest(args[i], args[i + 1]);
	}
	System.exit(success ? 0 : 1);
	}

	/**
	* Runs a single test. Error messages are displayed to stderr, and the return value
	* indicates general success/failure.
	*/
	public static boolean runTest(String type, String file) {
	System.out.println("Benchmarking " + type + " with file " + file);
	final Message defaultMessage;
	try {
	Class<?> clazz = Class.forName(type);
	Method method = clazz.getDeclaredMethod("getDefaultInstance");
	defaultMessage = (Message) method.invoke(null);
	} catch (Exception e) {
	// We want to do the same thing with all exceptions. Not generally nice,
	// but this is slightly different.
	System.err.println("Unable to get default message for " + type);
	return false;
	}

	try {
	final byte[] inputData = readAllBytes(file);
	final ByteArrayInputStream inputStream = new ByteArrayInputStream(inputData);
	final ByteString inputString = ByteString.copyFrom(inputData);
	final Message sampleMessage = defaultMessage.newBuilderForType().mergeFrom(inputString).build();
	FileOutputStream devNullTemp = null;
	CodedOutputStream reuseDevNullTemp = null;
	try {
	devNullTemp = new FileOutputStream("/dev/null");
	reuseDevNullTemp = CodedOutputStream.newInstance(devNullTemp);
	} catch (FileNotFoundException e) {
	// ignore: this is probably Windows, where /dev/null does not exist
	}
	final FileOutputStream devNull = devNullTemp;
	final CodedOutputStream reuseDevNull = reuseDevNullTemp;
	benchmark("Serialize to byte string", inputData.length, new Action() {
	public void execute() { sampleMessage.toByteString(); }
	});
	benchmark("Serialize to byte array", inputData.length, new Action() {
	public void execute() { sampleMessage.toByteArray(); }
	});
	benchmark("Serialize to memory stream", inputData.length, new Action() {
	public void execute() throws IOException {
	sampleMessage.writeTo(new ByteArrayOutputStream());
	}
	});
	if (devNull != null) {
	benchmark("Serialize to /dev/null with FileOutputStream", inputData.length, new Action() {
	public void execute() throws IOException {
	sampleMessage.writeTo(devNull);
	}
	});
	benchmark("Serialize to /dev/null reusing FileOutputStream", inputData.length, new Action() {
	public void execute() throws IOException {
	sampleMessage.writeTo(reuseDevNull);
	reuseDevNull.flush(); // force the write to the OutputStream
	}
	});
	}
	benchmark("Deserialize from byte string", inputData.length, new Action() {
	public void execute() throws IOException {
	defaultMessage.newBuilderForType().mergeFrom(inputString).build();
	}
	});
	benchmark("Deserialize from byte array", inputData.length, new Action() {
	public void execute() throws IOException {
	defaultMessage.newBuilderForType()
	.mergeFrom(CodedInputStream.newInstance(inputData)).build();
	}
	});
	benchmark("Deserialize from memory stream", inputData.length, new Action() {
	public void execute() throws IOException {
	defaultMessage.newBuilderForType()
	.mergeFrom(CodedInputStream.newInstance(inputStream)).build();
	inputStream.reset();
	}
	});
	System.out.println();
	return true;
	} catch (Exception e) {
	System.err.println("Error: " + e.getMessage());
	System.err.println("Detailed exception information:");
	e.printStackTrace(System.err);
	return false;
	}
	}

	private static void benchmark(String name, long dataSize, Action action) throws IOException {
	// Make sure it's JITted "reasonably" hard before running the first progress test
	for (int i=0; i < 100; i++) {
	action.execute();
	}

	// Run it progressively more times until we've got a reasonable sample
	int iterations = 1;
	long elapsed = timeAction(action, iterations);
	while (elapsed < MIN_SAMPLE_TIME_MS) {
	iterations *= 2;
	elapsed = timeAction(action, iterations);
	}

	// Upscale the sample to the target time. Do this in floating point arithmetic
	// to avoid overflow issues.
	iterations = (int) ((TARGET_TIME_MS / (double) elapsed) * iterations);
	elapsed = timeAction(action, iterations);
	System.out.println(name + ": " + iterations + " iterations in "
	+ (elapsed/1000f) + "s; "
	+ (iterations * dataSize) / (elapsed * 1024 * 1024 / 1000f)
	+ "MB/s");
	}

	private static long timeAction(Action action, int iterations) throws IOException {
	System.gc();
	long start = System.currentTimeMillis();
	for (int i = 0; i < iterations; i++) {
	action.execute();
	}
	long end = System.currentTimeMillis();
	return end - start;
	}

	private static byte[] readAllBytes(String filename) throws IOException {
	RandomAccessFile file = new RandomAccessFile(new File(filename), "r");
	byte[] content = new byte[(int) file.length()];
	file.readFully(content);
	return content;
	}

	/**
	* Interface used to capture a single action to benchmark.
	*/
	interface Action {
	void execute() throws IOException;
	}
	}