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jwise@draga.com said:
>  there do seem to be performance gains to using the libtcl-nothread in
> cases where the linked app does not need thread safety

Yep, I guess that GNU pth is significantly worse in this respect.
But, as said, it is not just the performance. I'll append a small
program which shows that it is not a good idea to dynamically
load libpthread into a program which was not built with -lpthread
from the beginning. Hope this helps to convince you...

best regards
Matthias



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#include <stdio.h>
#include <unistd.h>
#include <signal.h>
#include <dlfcn.h>
#include <err.h>

int flag;

void
hdl(int sig)
{
	flag = 1;
}

int
main()
{
	void *dlhdl;

	signal(SIGUSR1, hdl);
#if 1
	dlhdl = dlopen("/usr/lib/libpthread.so", RTLD_NOW);
	if (!dlhdl)
		errx(1, "%s", dlerror());
#endif

	kill(getpid(), SIGUSR1);
	sleep(1);
	printf("flag=%d\n", flag);
	return (0);
}

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