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// Copyright 2010 Google Inc. All Rights Reserved.
/**
* Diff Speed Test
*
* Compile from diff-match-patch/java with:
* javac -d classes src/name/fraser/neil/plaintext/diff_match_patch.java tests/name/fraser/neil/plaintext/Speedtest.java
* Execute with:
* java -classpath classes name/fraser/neil/plaintext/Speedtest
*
* @author fraser@google.com (Neil Fraser)
*/
package name.fraser.neil.plaintext;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
public class Speedtest {
public static void main(String args[]) throws IOException {
String text1 = readFile("tests/name/fraser/neil/plaintext/Speedtest1.txt");
String text2 = readFile("tests/name/fraser/neil/plaintext/Speedtest2.txt");
diff_match_patch dmp = new diff_match_patch();
dmp.Diff_Timeout = 0;
// Execute one reverse diff as a warmup.
dmp.diff_main(text2, text1, false);
long start_time = System.nanoTime();
dmp.diff_main(text1, text2, false);
long end_time = System.nanoTime();
System.out.printf("Elapsed time: %f\n", ((end_time - start_time) / 1000000000.0));
}
private static String readFile(String filename) throws IOException {
// Read a file from disk and return the text contents.
StringBuilder sb = new StringBuilder();
FileReader input = new FileReader(filename);
BufferedReader bufRead = new BufferedReader(input);
try {
String line = bufRead.readLine();
while (line != null) {
sb.append(line).append('\n');
line = bufRead.readLine();
}
} finally {
bufRead.close();
input.close();
}
return sb.toString();
}
}
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