zoom loop number
malloc the first less then 4k and malloc number is same #not 4k is slow
	修改：      malloc_4k_test.c
swap test
 test #the first is slow
test #the first malloc is slow
test malloc first is large and the number is same #the same
 sleep 1s #the small size is slow
unsleep #the same
test the malloc un4k and less than 1000s #the same
test malloc
malloc size & malloc number
pre merge
pre merge
after merge