With this version of java -XX:+DoEscapeAnalysis results in far less gc activity and 14x faster execution. $ java -version java version “1.6.0_14” Java(TM) SE Runtime Environment (build 1.6.0_14-b08) Java HotSpot(TM) Client VM (build 14.0-b16, mixed mode, sharing) $ uname -a Linux xxx 2.6.18-4-686 #1 SMP Mon Mar 26 17:17:36 UTC 2007 i686 GNU/Linux Without escape … Read more
The standard library containers separate top() and pop(): top() returns a reference to the top element, and pop() removes the top element. (And similarly for back()/pop_back() etc.). There’s a good reason for this separation, and not have pop remove the top element and return it: One guiding principle of C++ is that you don’t pay … Read more
Well, after some digging at the prompt, here’s what I get: stack = inspect.stack() the_class = stack[1][0].f_locals[“self”].__class__.__name__ the_method = stack[1][0].f_code.co_name print(“I was called by {}.{}()”.format(the_class, the_method)) # => I was called by A.a() When invoked: ➤ python test.py A.a() B.b() I was called by A.a() given the file test.py: import inspect class A: def a(self): … Read more
When you call a function, a new “namespace” is allocated on the stack. That’s how functions can have local variables. As functions call functions, which in turn call functions, we keep allocating more and more space on the stack to maintain this deep hierarchy of namespaces. To curb programs using massive amounts of stack space, … Read more
Your question is borderline here. programmers could be a better place. A good book to understand the concepts of stack etc might be Queinnec’s Lisp In Small Pieces (it explains quite well what a stack is for Lisp). Also, SICP is a good book to read. D.Knuth’s books and MMIX is also a good read. … Read more
Windows does not commit the stack memory immediately; instead, it reserves the address space for it, and commits it page-by-page when it is accessed. Read this page for more info. As a result, stack address space consists of three contiguous regions: Reserved but uncommitted memory which can be used for stack growth (but was never … Read more
What is the maximum size of the stack? Depends on implementation. One to few megabytes is typical on PC nowadays. Is it fixed for every program/computer? It’s typically fixed on linking but standard does not define that it is. Some operating systems can limit the stack during runtime too (RLIMIT_STACK on linux for example). Can … Read more
A quick Google search should reveal some information on this subject. > ulimit -a # shows the current stack size
From Wikipedia: In software, a stack overflow occurs when too much memory is used on the call stack. In many programming languages, the call stack contains a limited amount of memory, usually determined at the start of the program. The stack is a data structure that keeps record of the point the subroutines of a … Read more
First, to your original question, just be aware that if you’re working with very long strings, you don’t want to be making exact copies minus a single letter each time you make a function call. So you should favor using indexes or verify that your language of choice isn’t making copies behind the scenes. Second, … Read more