Geografic-Information-System/lib/linkm/test/speed3.c

/*
 **  Written by David Gerdes  US Army Construction Engineering Research Lab
 **     April 1992
 **  Copyright 1992 USA-CERL   All rights reserved.
 **
 */

/*
 **  This is a simple performance comparison between linkm and malloc
 **   I think it better simulates normal use of the library than
 **   speed.c or speed2.c
 */
#include <stdio.h>
#include <grass/linkm.h>

struct link
{
    char let;
    struct link *next;
};

#define LINKM

int main(int argc, char *argv[])
{
    register int i, j;
    VOID_T *head;
    struct link List, *tmp, *p;



#ifdef LINKM
    head = (VOID_T *) link_init(sizeof(struct link));
#endif


    for (j = 0; j < 1000; j++) {
	tmp = &List;

	for (i = 0; i < 2000; i++) {
#ifdef LINKM
	    p = (struct link *)link_new(head);
#else
	    p = (struct link *)malloc(sizeof(struct link));
#endif
	    tmp->next = p;
	    tmp = p;
	    tmp->next = NULL;
	}

	for (p = List.next; p != NULL;) {
	    tmp = p->next;
#ifdef LINKM
	    link_dispose(head, p);
#else
	    free(p);
#endif
	    p = tmp;
	}
    }


#ifdef LINKM
    link_cleanup(head);
#endif

    exit(0);
}