/thirdparty/breakpad/third_party/protobuf/protobuf/benchmarks/ProtoBench.java
http://github.com/tomahawk-player/tomahawk · Java · 203 lines · 144 code · 15 blank · 44 comment · 9 complexity · de22de601c268aaee37c844d5aee612c MD5 · raw file
- // Protocol Buffers - Google's data interchange format
- // Copyright 2009 Google Inc. All rights reserved.
- // http://code.google.com/p/protobuf/
- //
- // 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;
- }
- }