* tests/test_malloc.c [!DEFAULT_NTHREADS && HAVE_MMAP]
(DEFAULT_NTHREADS): Change the value from 10 to 16.
* tests/test_stack.c [!DEFAULT_NTHREADS] (DEFAULT_NTHREADS): Change
the value from 4 to 16.
#ifndef DEFAULT_NTHREADS
# ifdef HAVE_MMAP
-# define DEFAULT_NTHREADS 10
+# define DEFAULT_NTHREADS 16
# else
# define DEFAULT_NTHREADS 3
# endif
#endif
#ifndef DEFAULT_NTHREADS
-# define DEFAULT_NTHREADS 4 /* must be <= MAX_NTHREADS */
+# define DEFAULT_NTHREADS 16 /* must be <= MAX_NTHREADS */
#endif
#ifdef NO_TIMES