Hmm, this doesn't really make sense. The only differences in those two code snippets is the location of some tic/toc statements, which shouldn't meaningfully alter the run time. You're saying you've done this same exercise repeatedly and you keep getting the same result? Are you doing anything in between (e.g., manually altering any files)? Does it matter which order you run these in? Are you sure you've included the tic at the beginning when running the second snippet (if not, it'll compute the elapsed time using the previous call of tic, which could've been on a previous run).
What if you change your initial code to:
tstart = tic;
folderAddress = 'D:\Nejatian\';
tic
delete([folderAddress 'signals.csv'])
delete([folderAddress 'LatestSignals.csv'])
t1 = toc;
tic
writetable(T,[folderAddress 'signals.csv']);
t2 = toc;
tic
writetable(lT,[folderAddress 'LatestSignals.csv'])
t3 = toc;
tic
save([folderAddress 'visualData'],'visualData')
t4 = toc;
tic
delete('workspace.mat')
save('workspace.mat');
t5 = toc;
t = toc(tstart)
str1 = string(['Deleting CSV files = ' num2str(t1) 'Sec']);
str2 = string(['Writing CSV file one = ' num2str(t2) 'Sec']);
str3 = string(['Writing CSV file one = ' num2str(t3) 'Sec']);
str4 = string(['Saving Mat file from a struct variable = ' num2str(t1) 'Sec']);
str5 = string(['Saving all workspace variables = ' num2str(t1) 'Sec']);
str = string(['Total time = ' num2str(t) 'Sec']);
disp([str1;str2;str3;str4;str5;str]);
So we're doing a total time simultaneously with the individual component times. Do you still get the same problem?
