Compare overall insert and get times for containers.Map and java.util.HashMap in MATLAB

MLMapVJavaHashMap.m

clear;
clc;

import containers.Map;
import java.util.*;

MM = 10000;
NN = round(logspace(1,4));

times = zeros(length(MM),length(NN),2);

for x = 1:length(MM)
    
    M = MM(x);
    
    for y = 1:length(NN)

        N = NN(y);
        
        I = 1:M;
        J = 1:N;
        keys = cell(N,1);
        for j = J
            keys{j} = num2str(j);
        end
        order = randi(N, M, 2);

        start = clock();

        m = Map();
        for i = I
           j = order(i,1);
           m(keys{j}) = j;
        end

        for i = I
            j = order(i,1);
            m(keys{j});
        end

        finish = clock();
        fprintf('%-30s %.2fs\n', sprintf('containers.Map (%d,%d):', M, N), etime(finish, start));
        
        times(x,y,1) = etime(finish, start);
        
        clear m finish start;
        start = clock();

        m = java.util.HashMap();
        for i = I
           j = order(i,1);
           m.put(keys{j}, j);
        end

        for i = I
            j = order(i,1);
            m.get(keys{j});
        end

        finish = clock();
        fprintf('%-30s %.2fs\n', sprintf('java.util.HashMap (%d,%d):', M, N), etime(finish, start));
        
        times(x,y,2) = etime(finish, start);
        
        clear m finish start;

    end
    
end

figure;
subplot(2,1,1);
semilogx(NN, times(1,:,1), NN, times(1,:,2));
xlabel('Number of Elements');
ylabel('Time [s]');
legend('containers.Map', 'java.util.HashMap');
title('Execution time for Insert and Get');
subplot(2,1,2);
semilogx(NN, 20*log10(times(1,:,1)./times(1,:,2)));
xlabel('Number of Elements');
ylabel('Ratio [dB]');
title('Ratio of containers.Map time to java.util.HashMap time');