private static void benchFloat(ArrayFile af, int n) throws IOException {
float[] a = randfloat(n);
float[] b = zerofloat(n);
int nio;
Stopwatch sw = new Stopwatch();
sw.start();
for (nio = 0; sw.time() < 5.0; ++nio) {
af.seek(0);
af.writeFloats(a);
af.seek(0);
af.readFloats(b);
}
sw.stop();
for (int i = 0; i < n; ++i) if (a[i] != b[i]) throw new RuntimeException(" float: i/o failure");
double time = sw.time();
double rate = 2.0 * 4.0e-6 * nio * n / time;
System.out.println(" float: rate=" + rate + " MB/s");
}
