Tail-call optimization (or tail-call merging or tail-call elimination) is a generalization of TailRecursion: If the last thing a routine does before it returns is call another routine, rather than doing ajump-and-add-stack-frameimmediately followed by apop-stack-frame-and-return-to-caller, it...
Earlier I implemented "mutual tail recursion optimization without trampoline"[1]for good performance, which transforms the clear, expressive but slow code (many function calls): functiongcd_rec(a,b){if(a>b)returngcd_rec(a-b,b);if(b>a)returngcd_rec(b-a,a);returna;} ...
In this scheme, the tail call from p to q simply jumps to a point farther into the prologue sequence than would a normal call from some other routine. If the tail call is a self-recursive call—that is, p and q are the same procedure—then tail-call optimization can produce ...
b) Hypothetical IronScheme compiler will generate (note for scheme it has to do the optimization)复制 IL_000c: ... IL_000d: ... IL_000e: sub tail. IL_0023: call void TailRecursion.Program::CountDown(int32) IL_0029: ret c) Based on which JIT you are using and various other ...
However, what happened here wasnottail call optimization, since there wasno tail call to begin with. gcc outsmarted us by analyzing what the function does and optimizing away the needless recursion. The task was made easier by the simple, deterministic nature of the operations being done. By ...
其实对于递归没有太多可说的,但一定要注意的是尾递归(tail-recursion)。尾递归使得用递归的形式实现递推成为可能。 blog.chinaunix.net|基于3个网页 2. 尾端递回 尾端递回(tail-recursion)的特色是递回呼叫没有内涵在任何一个尚未执行完成的式子(expression)内。 以下面的例子而言, … ...
This is just a quick note. I couldn’t seem to find any good information on what sorts of tail call optimisations were performed by Scala so I ran a few quick tests. Disappointingly, the answer seems to be not much. A simple tail recursion was turned into a loop, but the following co...
今天看 python in nutshell 时看到了这段 Reader who are familiar Lisp, Scheme, or functional-programming languages must in particular be aware that Python does not implement the optimization of "tail-call e ...
Since many Scheme compilers use C as an intermediate target code, the tail recursion must be encoded in C without growing the stack, even if the C compiler does not optimize tail calls. 由于很多 Scheme 的编译器使用 C 作为中间目标语言,问题可转化为如何在 C 里在不让栈向上增长的前提下实现尾...
JVM Extentions to Realize Tail Recursion Optimization and First - class Continuations There are several programming languages that require tail recursion optimization and first-class continuations. Scheme, Standard ML, and several other most... A Yamamoto,T Yuasa - 《情報処理学会論文誌プログラミン...