byond memory usage of lists vs datums

byondmemory.dm

//run verb, give it its memory usage as it asks, be sure to wait 5 seconds from when it asks to when you enter the data. use process explorer for best results. Use dd -> ds, not direct ds run, re-launch dd between tests

#define SAMPLE_SIZE 1000000
/client/verb/memorytest()
	var/startingmemory = input("memory usage (kb)") as num
	var/list/lists = new (SAMPLE_SIZE)
	var/listemptymemory = input("memory usage (kb)") as num
	for (var/i in 1 to lists.len)
		lists[i] = list()
	var/listfullmemory = input("memory usage (kb)") as num
	var/list/datums = new (SAMPLE_SIZE)
	var/datumemptymemory = input("memory usage(kb)") as num
	for (var/i in 1 to datums.len)
		datums[i] = new /datum()
	var/datumfullmemory = input("memory usage(kb)") as num
	
	world << "Memory usage of list of lists with [num2text(SAMPLE_SIZE,99)] null values [num2text(listemptymemory - startingmemory, 99)]kb ([num2text((listemptymemory - startingmemory)/SAMPLE_SIZE*1024, 99)] bytes per unit)"
	world << "Memory usage of list of lists with [num2text(SAMPLE_SIZE,99)] list values [num2text(listfullmemory - listemptymemory, 99)]kb ([num2text((listfullmemory - listemptymemory)/SAMPLE_SIZE*1024, 99)] bytes per unit)"
	world << "Memory usage of list of datums with [num2text(SAMPLE_SIZE,99)] null values [num2text(datumemptymemory - listfullmemory, 99)]kb ([num2text((datumemptymemory - listfullmemory)/SAMPLE_SIZE*1024, 99)] bytes per unit)"
	world << "Memory usage of list of datums with [num2text(SAMPLE_SIZE,99)] datum values [num2text(datumfullmemory - datumemptymemory, 99)]kb ([num2text((datumfullmemory - datumemptymemory)/SAMPLE_SIZE*1024, 99)] bytes per unit)"