What is the primary reason behind certain languages optimizing tail recursion? 

  • To improve memory efficiency 
  • To make code look cleaner 
  • To speed up compilation time 
  • To allow deeper recursion depth
Tail recursion optimization, often referred to as Tail Call Optimization (TCO), primarily serves to improve memory efficiency. When a recursive call is the last thing a function does (tail recursion), some languages can optimize it to reuse the current function's stack frame for the next function call. This can lead to significant savings in stack space, especially for deep recursive calls. It allows recursion-intensive algorithms to run without consuming as much memory or leading to a stack overflow.
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