flatten

require 'benchmark'

array = []
array2 = []

CONST = 100_000
TEMPLATE = [[1,2],[1,2]]

time2 = Benchmark.measure do
    CONST.times do 
        array2 += TEMPLATE
    end
end
time = Benchmark.measure do
    CONST.times do 
        array << TEMPLATE
    end
    array.flatten(1)
end


puts time
puts time2