Benchmarking for uuid and hex(16)

bench1.rb

require 'benchmark'
require 'securerandom'

Benchmark.bm(7) do |x|
  x.report("UUID") { SecureRandom.uuid }
  x.report("hex(16)") { SecureRandom.hex(16) }
end

#Output

#              user     system      total        real
#UUID      0.000000   0.000000   0.000000 (  0.000182)
#hex(16)   0.000000   0.000000   0.000000 (  0.000010)

#              user     system      total        real
#UUID      0.000000   0.000000   0.000000 (  0.000152)
#hex(16)   0.000000   0.000000   0.000000 (  0.000010)