Can I increase the amount of memory allocation to my terminal or any other application to make it run faster ?

Hi,
I have a file that must be run using Terminal only. Its a pretty large file and i do remember that in WIndows we had an option where we could maximum run-time memory to speed up the process of a particular task. Is there any, such chance in Mac ?
Thank you
Teja

Dear Kappy,
Thank you so much for the reply. Basically this is what i am trying to figure out. I acknowledge that Mac and Apple are well built in every aspect. But i am just curious. Kindly bear.
In Windows, when i go to Task Manager > Processes > I can right click on any of them, and i can increase the Memory that is allocated from Normal > Above Normal > High > Very High > Real Time. So i am trying to work and do the same on Mac too. Because there is an application (Terminal), which i want to be executed at a higher rate. 
Yes i did try Renice as you mentioned. But there was "no immediate significant change". Then i also used a GUI version for renice, called "Process Wizard". Which also did the same.
However thank you for the reply.
God bless

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