There are 110 globals
for on empty table: 1000000 repetitions, 2.5625 seconds
rawnext on empty table: 1000000 repetitions, 3.4375 seconds
next on empty table: 1000000 repetitions, 3.36719 seconds
for on globals: 1000000 repetitions, 36.9375 seconds
rawnext on globals: 1000000 repetitions, 88.375 seconds
next on globals: 1000000 repetitions, 86.5938 seconds