Valgrind is hanging with no output

For a method that I am trying to code for one of the classes I have been working on, I am trying to read double values from a file and dynamically set some arrays inside the program with these numeric values.

I wanted to check, at least up to the point that I came, whether I have memory leaks or not. However, firing up valgrind just hangs, valgrind seems to work quite heavily since the cpu loading is high, but no output is generated even if I have been waiting for some time now. I have shuffled through the pages of the manual however could not find something useful. I compiled valgrind-3.8.0 and using that now. And I am firing it the way I have always done as

valgrind --leak-check=yes --log-file=valgrind_log ./binary_to_execute args_if_any

I could not also find sth useful for this hanging problem on google search. Any ideas on the reason of this hanging behaviour?

Edit 1: Here is a timing output from time command for the application

47740

real    0m1.299s
user    0m1.116s
sys     0m0.176s

Edit 2: Here is a link which is more or less the same as the problem that I am experiencing,

A message with a similar problem

Edit 3: I have noticed sth interesting, if the file size that I am trying to read is large this problem occurs, if the size of the files are relatively small, this hanging does not occur, which is also strange to me.