Using splat to accept large array is slow.

splat_benchmark.rb

require 'benchmark'

iterations = 100_000

def a(*args)
  args.size
end

def b(args)
  args.size
end

big_array = (1..100).to_a

Benchmark.bmbm do |bm|
  bm.report('use splat') do
    iterations.times do
      a(*big_array)
    end
  end

  bm.report('pass array') do
    iterations.times do
      b(big_array)
    end
  end
end