[ruby-core:76626] [Ruby trunk Feature#12639] Speed up require in RubyGems by 5x

Issue #12639 has been updated by Nobuyoshi Nakada.


I'm not sure if it is acceptable for rubygems to skip loaded features.

> ```diff
> +VALUE
> +rb_f_loaded_feature(VALUE obj, VALUE fname)
> +{
> +  return rb_provided(RSTRING_PTR(rb_str_encode_ospath(fname))) ? Qtrue : Qfalse;
> +}

Why is this function global?
And the argument of `RSTRING_PTR` should not have side effects.

----------------------------------------
Feature #12639: Speed up require in RubyGems by 5x
https://bugs.ruby-lang.org/issues/12639#change-59845

* Author: Samuel Giddins
* Status: Open
* Priority: Normal
* Assignee: 
----------------------------------------
This patch makes requiring an already-loaded file approximated 5x faster when the RubyGems mixin for require is present.
Benchmarked via the following script:

~~~ ruby
require "rubygems"
require "benchmark/ips"

Benchmark.ips do |x|
	x.report("ruby") { gem_original_require "rubygems" }
	x.report("rubygems") { require "rubygems" }
	
	x.compare!
end
~~~

I understand that it's not ideal to add new global functions, and I'd appreciate guidance on where else I could expose this functionality to ruby code.

Thanks :)

---Files--------------------------------
feature_loaded.patch (1.85 KB)


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