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-<p>
-  When a function is called a new stack frame is created in memory to store the
-  arguments and local variables of the function. If lots of these frames are
-  created during recursion then the program would use a large amount of memory,
-  or even crash the program if some limit is hit.
-</p>
-<p>
-  To avoid this problem Gleam supports <em>tail call optimisation</em>, which
-  allows the compiler to reuse the stack frame for the current function if a
-  function call is the last thing the function does, removing the memory cost.
-</p>
-
-<p>
-  Unoptimised recursive functions can often be rewritten into tail call
-  optimised functions by using an accumulator. An accumulator is a variable that
-  is passed along in addition to the data, similar to a mutable variable in a
-  language with <code>while</code> loops.
-</p>
-<p>
-  Accumulators should be hidden away from the users of your code, they are
-  internal implementation details. To do this write a public function that calls
-  a recursive private function with the initial accumulator value.
-</p>