Parallelize Independent External Calls (in a bounded way)

                  class Enrichment
  def call(member)
    tasks = [
      -> { fetch_github(member) },
      -> { fetch_blog(member) },
      -> { fetch_forum(member) }
    ]

    threads = tasks.map do |task|
      Thread.new do
        ActiveRecord::Base.connection_pool.with_connection { task.call }
      end
    end

    threads.map(&:value).compact
  ensure
    threads&.each { |t| t.kill unless t.stop? }
  end

  private

  def fetch_github(member) = GithubClient.new.get("/users/#{member.nickname}")
  def fetch_blog(member) = BlogClient.new.get("/authors/#{member.id}")
  def fetch_forum(member) = ForumClient.new.get("/profiles/#{member.id}")
end