def METHOD_NAME(voltype):
	global CHUNK_SIZES
	global N
	for chunk_size in CHUNK_SIZES[::-1]:
		cloudpath = 'gs://seunglab-test/test_v0/{}_{}_{}_{}'.format(voltype, *chunk_size)
		vol = CloudVolume(cloudpath, progress=True)
		stats = benchmark(lambda: vol[:], N)
		log({
			"direction": "download",
			"compression": "gzip",
			"image_type": voltype,
			"N": N,
			"mean": stats['mean'],
			"fastest": stats['fastest'],
			"slowest": stats['slowest'],
			"cloudpath": cloudpath,
			"chunk_size": chunk_size,
			"dtype": vol.dtype,
			"hostname": socket.gethostname(),
		})
	for chunk_size in CHUNK_SIZES[::-1]:
		cloudpath = 'gs://seunglab-test/test_v0/{}_uncompressed_{}_{}_{}'.format(voltype, *chunk_size)
		vol = CloudVolume(cloudpath, progress=True)
		stats = benchmark(lambda: vol[:], N)
		log({
			"direction": "download",
			"compression": "none",
			"image_type": voltype,
			"N": N,
			"mean": stats['mean'],
			"fastest": stats['fastest'],
			"slowest": stats['slowest'],
			"cloudpath": cloudpath,
			"chunk_size": chunk_size,
			"dtype": vol.dtype,
			"hostname": socket.gethostname(),
		})