array implicit conversion performance

0-results.txt

ruby 3.1.6p260 (2024-05-29 revision a777087be6) [arm64-darwin24]
Warming up --------------------------------------
      to_ary success     1.298M i/100ms
       Array success     1.844M i/100ms
      rescue success     1.916M i/100ms
Calculating -------------------------------------
      to_ary success     12.993M (± 0.5%) i/s   (76.96 ns/i) -     66.215M in   5.096195s
       Array success     18.418M (± 0.2%) i/s   (54.30 ns/i) -     92.221M in   5.007224s
      rescue success     19.166M (± 0.3%) i/s   (52.18 ns/i) -     97.726M in   5.098938s

Comparison:
      rescue success: 19166225.0 i/s
       Array success: 18417669.3 i/s - 1.04x  slower
      to_ary success: 12993380.0 i/s - 1.48x  slower

ruby 3.1.6p260 (2024-05-29 revision a777087be6) [arm64-darwin24]
Warming up --------------------------------------
         to_ary fail   218.607k i/100ms
          Array fail   808.883k i/100ms
         rescue fail    77.869k i/100ms
Calculating -------------------------------------
         to_ary fail      2.188M (± 1.0%) i/s  (457.10 ns/i) -     11.149M in   5.096679s
          Array fail      8.114M (± 0.2%) i/s  (123.25 ns/i) -     41.253M in   5.084386s
         rescue fail    770.190k (± 4.8%) i/s    (1.30 μs/i) -      3.893M in   5.072462s

Comparison:
          Array fail:  8113689.4 i/s
         to_ary fail:  2187702.6 i/s - 3.71x  slower
         rescue fail:   770189.7 i/s - 10.53x  slower

bench.rb

require 'benchmark/ips'

success_obj = []
fail_obj = 1

Benchmark.ips do |x|
  x.report("to_ary success") do
    if success_obj.respond_to?(:to_ary)
      success_obj.to_ary
    else
      raise "Wow there"
    end
  end

  x.report("Array success") do
    Array(success_obj)
  end

  x.report("rescue success") do
    begin
      success_obj.to_ary
    rescue NoMethodError
      raise InvalidCollectionArgumentError
    end
  end

  x.compare!
end


Benchmark.ips do |x|
  x.report("to_ary fail") do
    begin
    if fail_obj.respond_to?(:to_ary)
      fail_obj.to_ary
    else
      raise "Wow there"
    end
    rescue
      nil
    end
  end

  x.report("Array fail") do
    Array(fail_obj)
  end

  x.report("rescue fail") do
    begin
      begin
        fail_obj.to_ary
      rescue NoMethodError
        raise InvalidCollectionArgumentError
      end
    rescue
      nil
    end
  end

  x.compare!
end