I find that the harder with immutability is to go for it with a blank head. After that it's ok. Indeed if i use my xp from other languages, my brain screams th

I find that the harder with immutability is to go for it with a blank head. After that it's ok. Indeed if i use my xp from other languages, my brain screams that it's ineficient and will kill perfs. Old habits die hard.