Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com Delivered-To: mailing list cygwin AT cygwin DOT com Message-ID: <79218202D4B9D4118A290002A508E13B79C39A@PNZEXCHANGE> From: Ross Smith To: "'Hans Horn'" , cygwin AT cygwin DOT com Subject: RE: limit for # of items created with "new" ? Date: Wed, 25 Sep 2002 14:28:02 +1200 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" From: Hans Horn [mailto:hannes AT 2horns DOT com] > > // an element of a linked list > typedef struct node { > node (int _v, node* _n) : v(_v), next(_n) {} > int v; > node* next; > }; I'm surprised that compiled; the typedef shouldn't be there. > int main (int argc, char** argv) { > // allocate descriptions of points > char** points = new char*[NUM_POINTS]; assert(points); The assert is superfluous; new is guaranteed never to return null. > for (int i = 0; i < NUM_POINTS; i++) { > points[i] = new char[2800]; assert(points[i]); > } You're allocating 2800 bytes for each of 85000 entries; that's 238 megabytes so far. You said earlier that it failed when you tried it with 1.6 million objects (which I take to mean that was the value of NUM_POINTS). I'm not surprised; that would have tried to allocate four and a half gigabytes of memory! > [ lots of code snipped ] I also recommend that you start learning about the standard library; you're reinventing a lot of wheels here. -- Ross Smith ...................... Pharos Systems, Auckland, New Zealand "C++ is to programming as sex is to reproduction. Better ways might technically exist but they're not nearly as much fun." - Nikolai Irgens -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Bug reporting: http://cygwin.com/bugs.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/