import java.io.FileInputStream;

import java.io.IOException;

import java.io.InputStream;

import org.jruby.Ruby;

import org.jruby.runtime.load.LoadServiceResourceInputStream;

public class BenchParser {

public static final int N = 1000;

public static void main(String[] args) {

try {

String file = args[0];

InputStream in = getContents(file);

int iterations = getIterations(args);

System.out.println("Parsing " + file + " " + iterations + " times");

Ruby runtime = Ruby.getGlobalRuntime();

long start = System.nanoTime();

for (int i = 0; i < iterations; i++) {

long start2 = System.nanoTime();

runtime.parseFile(file, in, null);

System.out.println("Parse took: " + seconds(start2, System.nanoTime()) + "ms");

}

System.out.println("Total parse took: " + seconds(start, System.nanoTime()) + "ms");

} catch (Exception e) {

System.err.println("Parse bench failed: " + e.getMessage());

e.printStackTrace(System.err);

}

}

private static double seconds(long start, long end) {

return (end - start) * 1.0 / 1000000.0;

}

private static int getIterations(String[] args) {

return args.length > 1 ? Integer.valueOf(args[1]) : N;

}

private static InputStream getContents(String file) throws IOException {

return new LoadServiceResourceInputStream(new FileInputStream(file));

}

}