From: "byroot (Jean Boussier) via ruby-core" <ruby-core@...>
Date: 2023-05-25T21:10:54+00:00
Subject: [ruby-core:113664] [Ruby master Misc#19693] Data initialization is significantly slower than Struct

Issue #19693 has been updated by byroot (Jean Boussier).





@janosch-x based on the discussion in #19278, I don't think it's possible as `Data` specifically designed so that `initialize` always receive keyword arguments.



So given the spec (which we can't change) I don't see how it could be made performant, but maybe someone has an idea? 





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Misc #19693: Data initialization is significantly slower than Struct

https://bugs.ruby-lang.org/issues/19693#change-103309



* Author: janosch-x (Janosch M�ller)

* Status: Closed

* Priority: Normal

----------------------------------------

Maybe there is potential to make it as fast as Struct?



```ruby

require 'benchmark/ips'



S = Struct.new(:a, :b, :c, :d, :e, :f, :g, :h, :i, :j)

D = Data.define(:a, :b, :c, :d, :e, :f, :g, :h, :i, :j)



Benchmark.ips do |x|

  x.report('Struct') { S.new(1, 2, 3, 4, 5, 6, 7, 8, 9, 10) }

  x.report('Data')   { D.new(1, 2, 3, 4, 5, 6, 7, 8, 9, 10) }

  x.compare!

end; 1



# => [...]

# =>             Struct:  6916530.4 i/s

# =>               Data:  1507259.5 i/s - 4.59x  slower

```







-- 

https://bugs.ruby-lang.org/

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