Performance for two different knight moves

import java.util.logging.Level;

import net.tuis.ubench.UBench;
import net.tuis.ubench.UUtils;


public class KnightMove {

    @FunctionalInterface
    public interface KValid {
        boolean isValid(int r1, int c1, int r2, int c2);
    }

    public static boolean isValidAbs(int r1, int c1, int r2, int c2) {
        int row = Math.abs(r2 - r1);
        int col = Math.abs(c2 - c1);
        return ((row == 2 && col == 1) || (row == 1 && col == 2));
    }

    public static boolean isValidPyth(int r1, int c1, int r2, int c2) {
        // use pythagoras to ensure that a move makes a right-angled
        // triangle move with sides of 1 and 2. 1-squared + 2 squared is 5.
        int deltaR = r2 - r1;
        int deltaC = c2 - c1;
        return 5 == deltaR * deltaR + deltaC * deltaC;
    }

    public static int countValid(final KValid ivalid, final int size) {
        int count = 0;
        for (int r1 = 0; r1 < size; r1++) {
            for (int c1 = 0; c1 < size; c1++) {
                for (int r2 = 0; r2 < size; r2++) {
                    for (int c2 = 0; c2 < size; c2++) {
                        if (ivalid.isValid(r1, c1, r2, c2)) {
                            count++;
                        }
                    }
                }

            }
        }
        return count;
    }

    public static void main(String[] args) {
        UUtils.setStandaloneLogging(Level.INFO);
        UBench bench = new UBench("Knights");
        bench.addTask("Pyth", () -> countValid(KnightMove::isValidPyth, 20));
        bench.addTask("Absc", () -> countValid(KnightMove::isValidAbs, 20));
        bench.press(1000).report();
        bench.press(1000).report();
    }

    /*

    INFO   2015-09-26 22:28:42.670 net.tuis.ubench.UBench(<init>): Creating UBench for suite Knights
    INFO   2015-09-26 22:28:43.077 net.tuis.ubench.UBench(press): UBench suite Knights: completed benchmarking all tasks using mode INTERLEAVED in 388.177ms
    Task Knights -> Pyth: (Unit: MILLISECONDS)
      Count    :     1000      Average  :   0.1448
      Fastest  :   0.1160      Slowest  :   8.0058
      95Pctile :   0.1895      99Pctile :   0.2396
      TimeBlock : 0.304 0.133 0.132 0.132 0.128 0.125 0.124 0.124 0.124 0.122
      Histogram :   984    13     1     0     0     1     1

    Task Knights -> Absc: (Unit: MILLISECONDS)
      Count    :     1000      Average  :   0.2256
      Fastest  :   0.1887      Slowest  :  11.3645
      95Pctile :   0.2842      99Pctile :   0.3951
      TimeBlock : 0.366 0.216 0.215 0.213 0.212 0.209 0.212 0.205 0.204 0.204
      Histogram :   990     9     0     0     0     1

    INFO   2015-09-26 22:28:43.436 net.tuis.ubench.UBench(press): UBench suite Knights: completed benchmarking all tasks using mode INTERLEAVED in 337.284ms
    Task Knights -> Pyth: (Unit: MILLISECONDS)
      Count    :     1000      Average  :   0.1272
      Fastest  :   0.1157      Slowest  :   0.4646
      95Pctile :   0.1571      99Pctile :   0.2432
      TimeBlock : 0.124 0.125 0.151 0.131 0.121 0.125 0.123 0.123 0.122 0.125
      Histogram :   983    16     1

    Task Knights -> Absc: (Unit: MILLISECONDS)
      Count    :     1000      Average  :   0.2080
      Fastest  :   0.1883      Slowest  :   0.4350
      95Pctile :   0.2562      99Pctile :   0.3734
      TimeBlock : 0.204 0.202 0.238 0.216 0.202 0.202 0.207 0.202 0.200 0.205
      Histogram :   993     7

      */

}