The movement of the hard drive's read/write heads over different areas of the disk when accessing fragmented files is slower, compared to accessing the entire contents of a non-fragmented file sequentially without moving the read/write heads to seek other fragments.
The giant oceanic manta ray can grow to a disc size of up to 7 m (23 ft) with a weight of about 1,350 kg (2,980 lb) but average size commonly observed is 4.5 m (15 ft). It is dorsoventrally flattened and has large, triangular pectoral fins on either side of the disc.
On average, mantids and hummingbirds are the same length. But compare a hummingbird to a mantis's usual meal, and the size difference is quite astounding. Hummingbirds tend to be about 4 inches long (though some species, like the Giant Hummingbird, are twice that size), while bees and wasps are about half an inch long.