#The Simplest way to measure cell execution time in ipython notebook is by using ipython-autotime package.
#Install the package in the begining of the notebook
!pip install ipython-autotime
#and then load the extension by running below
%load_ext autotime
#Once you have loaded it, any cell run after this ,will give you the execution time of the cell.
#And dont worry if you want to turn it off, just unload the extension by running below
%unload_ext autotime