problem in parallel of functions

Hi ...

I write my functions with parallel , Elapsed time was ( 22 to 24 se) after days , I trys test of my code give me Elapsed time 55 sec , not change any thing in code with same picture ( lena.png) for encryption .... why .

% calling encryption each Channel

%%%%%%%%%%%%%%%%

% Parallel Computing

tic;

funcs1 = {@Encryption_chaotic, @Encryption_chaotic, @Encryption_chaotic} ; % let fun1, fun2 be two functions

arguments = {redChannel,Rk1 ;greenChannel,Gk2;blueChannel,Bk3} ; % write the inputs of each function

solutions = cell(1,2,3); % initialize the solution

% use of parfor

parfor ii = 1:3

solutions{ii}=funcs1{ii}(arguments{ii,:});

end

after_encryption_redchaotic = solutions{1} ;

after_encryption_greenchaotic = solutions{2} ;

after_encryption_bluechaotic = solutions{3} ;% assign the results

clearvars funcsl solutions arguments ;

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% calling Decryption each Channel using S-box

%%%%%%%%%%%%%%%%

% Parallel Computing

funcs1 = {@Encryption_SBOX, @Encryption_SBOX, @Encryption_SBOX} ; % let fun1, fun2 be two functions

arguments = {after_encryption_redchaotic,SBox ;after_encryption_greenchaotic,SBox;after_encryption_bluechaotic,SBox} ; % write the inputs of each function

solutions = cell(1,2,3); % initialize the solution

% use of parfor

parfor ii = 1:3

solutions{ii}=funcs1{ii}(arguments{ii,:});

end

after_encryption_redSBOX = solutions{1} ;

after_encryption_greenSBOX = solutions{2} ;

after_encryption_blueSBOX = solutions{3} ;% assign the results

clearvars funcsl solutions arguments SBox ;

toc;