Track allocations by Ruby source file + line

tracer.rb

require "objspace"

ObjectSpace.trace_object_allocations do
  yield
end

allocations = ObjectSpace.each_object.map do |obj|
  next if ObjectSpace.allocation_sourcefile(obj).nil?
  next if ObjectSpace.allocation_sourcefile(obj) == __FILE__

  obj.class.to_s + " - " + ObjectSpace.allocation_sourcefile(obj) + ":" + ObjectSpace.allocation_sourceline(obj).to_s
end.compact
  
allocations.tally.each do |k, v|
  puts "#{v}: #{k}"
end

ObjectSpace.trace_object_allocations_clear