[ruby-core:113663] [Ruby master Misc#19693] Data initialization is significantly slower than Struct

Issue #19693 has been updated by janosch-x (Janosch M=FCller).





@byroot To me it looks as if the handling of positional args in `rb_data_s_=
new` / `rb_data_initialize_m` could perhaps be patched so as not to create =
an intermediate hash and thus greatly increase performance for this case. I=
 might be missing a gotcha and am unsure whether its worth it, though.



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Misc #19693: Data initialization is significantly slower than Struct

https://bugs.ruby-lang.org/issues/19693#change-103308



* Author: janosch-x (Janosch M=FCller)

* Status: Closed

* Priority: Normal

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

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



```ruby

require 'benchmark/ips'



S =3D Struct.new(:a, :b, :c, :d, :e, :f, :g, :h, :i, :j)

D =3D 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



# =3D> [...]

# =3D>             Struct:  6916530.4 i/s

# =3D>               Data:  1507259.5 i/s - 4.59x  slower

```







--=20

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

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