local i2 = 0
local runNum = 10000000
local tm = tick()

for i=1, runNum do
    i2 = i < 0  and i * -1 or i
end

print("test 1", tick() - tm)

local tm = tick()

for i=1, runNum do
    i2 = i < 0  and -i or i
end

print("test 2", tick() - tm)

local tm = tick()

for i=1, runNum do
    if i < 0  then i2 = -1 else i2 = i end
end

print("test 3", tick() - tm)