mirror of
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204 lines
8.1 KiB
Java
204 lines
8.1 KiB
Java
// Protocol Buffers - Google's data interchange format
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// Copyright 2009 Google Inc. All rights reserved.
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// https://developers.google.com/protocol-buffers/
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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package com.google.protocolbuffers;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.io.RandomAccessFile;
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import java.lang.reflect.Method;
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import com.google.protobuf.ByteString;
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import com.google.protobuf.CodedInputStream;
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import com.google.protobuf.CodedOutputStream;
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import com.google.protobuf.Message;
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public class ProtoBench {
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private static final long MIN_SAMPLE_TIME_MS = 2 * 1000;
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private static final long TARGET_TIME_MS = 30 * 1000;
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private ProtoBench() {
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// Prevent instantiation
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}
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public static void main(String[] args) {
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if (args.length < 2 || (args.length % 2) != 0) {
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System.err.println("Usage: ProtoBench <descriptor type name> <input data>");
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System.err.println("The descriptor type name is the fully-qualified message name,");
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System.err.println("e.g. com.google.protocolbuffers.benchmark.Message1");
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System.err.println("(You can specify multiple pairs of descriptor type name and input data.)");
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System.exit(1);
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}
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boolean success = true;
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for (int i = 0; i < args.length; i += 2) {
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success &= runTest(args[i], args[i + 1]);
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}
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System.exit(success ? 0 : 1);
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}
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/**
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* Runs a single test. Error messages are displayed to stderr, and the return value
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* indicates general success/failure.
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*/
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public static boolean runTest(String type, String file) {
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System.out.println("Benchmarking " + type + " with file " + file);
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final Message defaultMessage;
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try {
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Class<?> clazz = Class.forName(type);
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Method method = clazz.getDeclaredMethod("getDefaultInstance");
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defaultMessage = (Message) method.invoke(null);
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} catch (Exception e) {
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// We want to do the same thing with all exceptions. Not generally nice,
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// but this is slightly different.
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System.err.println("Unable to get default message for " + type);
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return false;
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}
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try {
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final byte[] inputData = readAllBytes(file);
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final ByteArrayInputStream inputStream = new ByteArrayInputStream(inputData);
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final ByteString inputString = ByteString.copyFrom(inputData);
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final Message sampleMessage = defaultMessage.newBuilderForType().mergeFrom(inputString).build();
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FileOutputStream devNullTemp = null;
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CodedOutputStream reuseDevNullTemp = null;
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try {
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devNullTemp = new FileOutputStream("/dev/null");
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reuseDevNullTemp = CodedOutputStream.newInstance(devNullTemp);
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} catch (FileNotFoundException e) {
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// ignore: this is probably Windows, where /dev/null does not exist
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}
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final FileOutputStream devNull = devNullTemp;
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final CodedOutputStream reuseDevNull = reuseDevNullTemp;
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benchmark("Serialize to byte string", inputData.length, new Action() {
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public void execute() { sampleMessage.toByteString(); }
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});
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benchmark("Serialize to byte array", inputData.length, new Action() {
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public void execute() { sampleMessage.toByteArray(); }
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});
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benchmark("Serialize to memory stream", inputData.length, new Action() {
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public void execute() throws IOException {
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sampleMessage.writeTo(new ByteArrayOutputStream());
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}
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});
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if (devNull != null) {
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benchmark("Serialize to /dev/null with FileOutputStream", inputData.length, new Action() {
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public void execute() throws IOException {
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sampleMessage.writeTo(devNull);
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}
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});
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benchmark("Serialize to /dev/null reusing FileOutputStream", inputData.length, new Action() {
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public void execute() throws IOException {
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sampleMessage.writeTo(reuseDevNull);
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reuseDevNull.flush(); // force the write to the OutputStream
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}
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});
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}
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benchmark("Deserialize from byte string", inputData.length, new Action() {
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public void execute() throws IOException {
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defaultMessage.newBuilderForType().mergeFrom(inputString).build();
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}
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});
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benchmark("Deserialize from byte array", inputData.length, new Action() {
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public void execute() throws IOException {
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defaultMessage.newBuilderForType()
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.mergeFrom(CodedInputStream.newInstance(inputData)).build();
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}
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});
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benchmark("Deserialize from memory stream", inputData.length, new Action() {
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public void execute() throws IOException {
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defaultMessage.newBuilderForType()
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.mergeFrom(CodedInputStream.newInstance(inputStream)).build();
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inputStream.reset();
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}
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});
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System.out.println();
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return true;
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} catch (Exception e) {
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System.err.println("Error: " + e.getMessage());
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System.err.println("Detailed exception information:");
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e.printStackTrace(System.err);
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return false;
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}
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}
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private static void benchmark(String name, long dataSize, Action action) throws IOException {
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// Make sure it's JITted "reasonably" hard before running the first progress test
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for (int i=0; i < 100; i++) {
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action.execute();
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}
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// Run it progressively more times until we've got a reasonable sample
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int iterations = 1;
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long elapsed = timeAction(action, iterations);
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while (elapsed < MIN_SAMPLE_TIME_MS) {
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iterations *= 2;
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elapsed = timeAction(action, iterations);
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}
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// Upscale the sample to the target time. Do this in floating point arithmetic
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// to avoid overflow issues.
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iterations = (int) ((TARGET_TIME_MS / (double) elapsed) * iterations);
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elapsed = timeAction(action, iterations);
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System.out.println(name + ": " + iterations + " iterations in "
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+ (elapsed/1000f) + "s; "
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+ (iterations * dataSize) / (elapsed * 1024 * 1024 / 1000f)
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+ "MB/s");
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}
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private static long timeAction(Action action, int iterations) throws IOException {
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System.gc();
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long start = System.currentTimeMillis();
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for (int i = 0; i < iterations; i++) {
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action.execute();
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}
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long end = System.currentTimeMillis();
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return end - start;
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}
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private static byte[] readAllBytes(String filename) throws IOException {
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RandomAccessFile file = new RandomAccessFile(new File(filename), "r");
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byte[] content = new byte[(int) file.length()];
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file.readFully(content);
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return content;
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}
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/**
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* Interface used to capture a single action to benchmark.
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*/
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interface Action {
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void execute() throws IOException;
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}
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}
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