Commands running everytime I open the terminal

Probably a noob question, but I have Sequoia running on a Late 2016 15" (Touch Bar) and now I notice that when I open a terminal window, I have to wait for a few seconds and on the title bar I see commands passing around like dirname, printf, tail , grep like executing something. Is this normal? Am I doing something wrong?

submitted by /u/saintcore
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