Adding Alba

[vizvamitra]

Hi,

There is another serialization library named alba, also very performant. On my laptop, it outperforms everyone in attributes/has_one benchmarks and takes 2nd place in has_many (YJIT enabled):

Attributes

Gem	IPS	Comparison	Allocations	Comparison
alba 3.6.0	418.366k ± 5.0%	baseline	968.000	baseline
panko_serializer 0.8.3	325.561k ±11.6%	1.29x slower	1.016k	1.05x more
transmutation 0.5.1	291.357k ± 5.1%	1.44x slower	1.416k	1.46x more
active_model_serializers 0.10.15	167.788k ± 4.5%	2.49x slower	2.368k	2.45x more
jsonapi-serializer 2.2.0	156.405k ± 7.5%	2.67x slower	3.400k	3.51x more
representable 3.2.0	118.305k ± 5.2%	3.54x slower	4.304k	4.45x more
rabl 0.17.0	88.614k ± 2.2%	4.72x slower	5.856k	6.05x more
jbuilder 2.13.0	70.323k ±10.8%	5.95x slower	2.960k	3.06x more

Has one / Belongs to association

Gem	IPS	Comparison	Allocations	Comparison
alba 3.6.0	173.612k ± 2.2%	baseline	1.792k	baseline
transmutation 0.5.1	123.495k ± 2.1%	1.41x slower	2.832k	1.58x more
panko_serializer 0.8.3	106.747k ± 3.3%	1.63x slower	4.128k	2.30x more
representable 3.2.0	60.661k ± 1.3%	2.86x slower	6.184k	3.45x more
active_model_serializers 0.10.15	50.054k ± 0.9%	3.47x slower	6.384k	3.56x more
rabl 0.17.0	46.370k ± 3.4%	3.74x slower	9.608k	5.36x more
jsonapi-serializer 2.2.0	40.628k ± 1.4%	4.27x slower	12.368k	6.90x more
jbuilder 2.13.0	34.031k ± 1.6%	5.10x slower	4.944k	2.76x more

Has many association

Gem	IPS	Comparison	Allocations	Comparison
panko_serializer 0.8.3	206.260k ± 5.0%	baseline	1.376k	baseline
alba 3.6.0	130.061k ± 1.2%	1.59x slower	2.320k	1.69x more
transmutation 0.5.1	81.483k ± 1.8%	2.53x slower	4.408k	3.20x more
representable 3.2.0	39.688k ± 1.8%	5.20x slower	9.640k	7.01x more
active_model_serializers 0.10.15	34.400k ± 3.7%	6.00x slower	9.480k	6.89x more
jbuilder 2.13.0	32.044k ± 5.9%	6.44x slower	6.208k	4.51x more
jsonapi-serializer 2.2.0	30.699k ± 0.7%	6.72x slower	16.408k	11.92x more
rabl 0.17.0	22.172k ± 1.4%	9.30x slower	10.912k	7.93x more

Thought it would be worth adding it to the benchmarks. Sorry for providing the code instead of making a PR: I though it'd be wrong to use benchmark results from another laptop in the Readme.md

# Gemfile
#
gem "alba"

# lib/serializers/alba/organisation_serializer.rb
#
module Alba
  class OrganisationSerializer
    include Alba::Resource

    attributes :id, :name

    attribute :logo_url do
      "https://example.com/logos/companies/#{object.id}"
    end
  end
end

# lib/serializers/alba/post_serializer.rb
#
module Alba
  class PostSerializer
    include Alba::Resource

    attributes :id, :title, :body

    one :user, resource: Alba::UserSerializer
  end
end

# lib/serializers/alba/user_serializer.rb
#
module Alba
  class UserSerializer
    include Alba::Resource

    attributes :id, :first_name

    attribute :full_name do
      "#{object.first_name} #{object.last_name}"
    end

    many :posts, resource: Alba::PostSerializer
  end
end

# benchmark.rb
#
GemBenchmarks.report output: true do
  group("Attributes") do
    # ...
    example("alba")                     { Alba::OrganisationSerializer.new(organisation).serialize }
  end

  group("Has One / Belongs To") do
    # ...
    example("alba")                     { Alba::PostSerializer.new(post, within: [:user]).serialize }
  end

  group("Has Many") do
    # ...
    example("alba")                     { Alba::UserSerializer.new(user, within: [:posts]).serialize }
  end
end