Reduce allocated memory for Module#delegate.

[tgxworld]

I used the memory_profiler gem to look at the allocated memory when running a test.

Test Script modified from @eileencodes integration performance test repo:

require 'test_helper'

class DocumentsIntegrationTest < ActionDispatch::IntegrationTest
  test "create" do
    post '/documents', params: { document: { title: "New things", content: "Doing them" } }

    document = Document.last
    assert_equal 'New things', document.title
    assert_equal 'Doing them', document.content
  end
end

report = MemoryProfiler.report do
  Minitest.run_one_method(DocumentsIntegrationTest, 'test_create')
end

report.pretty_print

Before:

allocated memory by gem
-----------------------------------
activesupport/lib x 486470

allocated memory by file
-----------------------------------
/home/guoxiang/work/rails-dev-box/rails/activesupport/lib/active_support/core_ext/module/delegation.rb x 195005

allocated memory by location
-----------------------------------
/home/guoxiang/work/rails-dev-box/rails/activesupport/lib/active_support/core_ext/module/delegation.rb:170 x 136119

After:

allocated memory by gem
-----------------------------------
activesupport/lib x 354170

allocated memory by file
-----------------------------------
/home/guoxiang/work/rails-dev-box/rails/activesupport/lib/active_support/core_ext/module/delegation.rb x 62705

allocated memory by location
-----------------------------------
# Does not show in report

[senny]

@tgxworld thank you, this looks good.

[eileencodes]

@tgxworld in the future can you put the before and after in the commit so we don't need to track down the github PR. Thanks! 😸 :

[tgxworld]

@eileencodes Opps I'll take note in the future! 😄