Benchmark mini_mime vs marcel

benchmark_mini_mime_vs_marcel.rb

require 'memory_profiler'
require 'benchmark/ips'

puts "Memory stats for requiring mini_mime"
result = MemoryProfiler.report do
  require 'mini_mime'
end
puts "Total allocated: #{result.total_allocated_memsize} bytes (#{result.total_allocated} objects)"

puts "Memory stats for requiring marcel"
result = MemoryProfiler.report do
  require 'marcel'
end
puts "Total allocated: #{result.total_allocated_memsize} bytes (#{result.total_allocated} objects)"

Benchmark.ips do |bm|
  bm.report 'cached content_type lookup MiniMime' do
    MiniMime.lookup_by_filename("a.txt").content_type
  end

  bm.report 'content_type lookup Marcel::MimeType' do
    Marcel::MimeType.for "a.txt"
  end

  bm.compare!
end

module MiniMime
  class Db
    class RandomAccessDb
      alias_method :lookup, :lookup_uncached
    end
  end
end

Benchmark.ips do |bm|
  bm.report 'uncached content_type lookup MiniMime' do
    MiniMime.lookup_by_filename("a.txt").content_type
  end

  bm.report 'content_type lookup Marcel::MimeType' do
    Marcel::MimeType.for "a.txt"
  end
  bm.compare!
end

# ruby 2.6.6p146 (2020-03-31 revision 67876) [x86_64-darwin19]
# Memory stats for requiring mini_mime
# Total allocated: 478455 bytes (5677 objects)
# Memory stats for requiring marcel
# Total allocated: 1548021 bytes (23836 objects)
# Warming up --------------------------------------
# cached content_type lookup MiniMime
#                        125.096k i/100ms
# content_type lookup Marcel::MimeType
#                        434.000  i/100ms
# Calculating -------------------------------------
# cached content_type lookup MiniMime
#                           1.243M (± 6.4%) i/s -      6.255M in   5.061474s
# content_type lookup Marcel::MimeType
#                           4.416k (± 2.0%) i/s -     22.134k in   5.014166s

# Comparison:
# cached content_type lookup MiniMime:  1242769.7 i/s
# content_type lookup Marcel::MimeType:     4416.1 i/s - 281.42x  (± 0.00) slower

# Warming up --------------------------------------
# uncached content_type lookup MiniMime
#                          1.284k i/100ms
# content_type lookup Marcel::MimeType
#                        398.000  i/100ms
# Calculating -------------------------------------
# uncached content_type lookup MiniMime
#                          12.085k (± 7.1%) i/s -     60.348k in   5.024001s
# content_type lookup Marcel::MimeType
#                           4.034k (± 5.6%) i/s -     20.298k in   5.048360s

# Comparison:
# uncached content_type lookup MiniMime:    12084.8 i/s
# content_type lookup Marcel::MimeType:     4034.4 i/s - 3.00x  (± 0.00) slower