There are 110 globals
for on empty table: 1000000 repetitions, 2.58594 seconds
rawnext on empty table: 1000000 repetitions, 3.4375 seconds
next on empty table: 1000000 repetitions, 3.44531 seconds
for on globals: 1000000 repetitions, 33.6328 seconds
rawnext on globals: 1000000 repetitions, 90.8047 seconds
next on globals: 1000000 repetitions, 90.8359 seconds