require 'benchmark/ips'
require 'memory_profiler'

# Current method
def capitalize(name)
  name.to_s.split(/-/).map {|s| s.capitalize }.join('-')
end

# Enhanced method
def capitalize_new(name)
  name.to_s.split('-').map(&:capitalize).join('-')
end

DEMO_STRING = 'abc-def-xyz'

puts "capitalize(DEMO_STRING): #{capitalize(DEMO_STRING)}"
puts "capitalize_new(DEMO_STRING): #{capitalize_new(DEMO_STRING)}"

raise 'Not equal' unless capitalize(DEMO_STRING) == capitalize_new(DEMO_STRING)

Benchmark.ips do |x|
  x.report("Current capitalize") { capitalize(DEMO_STRING) }
  x.report("Enhanced capitalize") { capitalize_new(DEMO_STRING) }

  x.compare!
end

# Warming up --------------------------------------
#   Current capitalize    74.573k i/100ms
#  Enhanced capitalize   111.936k i/100ms
# Calculating -------------------------------------
#   Current capitalize    716.449k (± 2.9%) i/s -      3.654M in   5.104556s
#  Enhanced capitalize      1.100M (± 2.5%) i/s -      5.597M in   5.093632s

# Comparison:
#  Enhanced capitalize:  1099514.8 i/s
#   Current capitalize:   716449.3 i/s - 1.53x  slower

# Now for memory profiling

puts 'Current capitalize', '=' * 50, ''

MemoryProfiler.report {
  10_000.times { capitalize(DEMO_STRING) }
}.pretty_print

# allocated memory by gem
# -----------------------------------
#    6_480_000  other
# allocated objects by class
# -----------------------------------
#     100_000  String
#      20_000  Array
#      10_000  MatchData

puts '', 'New capitalize', '=' * 50, ''

MemoryProfiler.report {
  10_000.times { capitalize_new(DEMO_STRING) }
}.pretty_print

# allocated memory by gem
# -----------------------------------
#    4_400_000  other
# allocated objects by class
# -----------------------------------
#      90_000  String
#      20_000  Array