Almost every objects are now WB protected, with just a few
exceptions, hence we can provide a much simpler interface.
It's also much easier to find the remaining unprotected objects.
[Bug #22013]
Up to a certain size, only `eql?` is used, but for larger arrays
a Hash is used an `#hash` becomes necessary.
We could consider always checking `#hash` for consistency, but
that would decrease performance.
At the very least we can clarify the documentation.
For now the provided size is just for GC statistics, but in the future
we may want to forward it to C23's `free_sized` and passing an incorrect
size to it is undefined behavior.
* Document Range#to_set
* Update Thread#raise and Fiber#raise signatures and docs
* Add reference to String#strip to character_selectors.rdoc
* Update *nil docs when calling methods
* Enhance Array#find and #rfind docs
* Add a notice to Kernel#raise about cause:
Implement Array#rfind, which is the same as find except from the
other side of the Array. Also implemented Array#find (as opposed to
the generic one on Enumerable because it is significantly faster
and to keep the implementations together.
[Feature #21678]
When all elements are strings, we never have to recalculate the length
of the array because there are no conversion methods that are called, so
the length will never change. This speeds up the fast path by ~10%.
```ruby
a = ["1"*10, "2"*10, "3"*10, "4"*10, "5"*10] * 10
10_000_000.times do
a.join
end
```
```
hyperfine --warmup 1 'ruby ../ruby2/test.rb' './exe/ruby ../ruby2/test.rb'
Benchmark 1: ruby ../ruby2/test.rb
Time (mean ± σ): 3.779 s ± 0.053 s [User: 3.754 s, System: 0.017 s]
Range (min … max): 3.715 s … 3.874 s 10 runs
Benchmark 2: ./exe/ruby ../ruby2/test.rb
Time (mean ± σ): 3.411 s ± 0.038 s [User: 3.387 s, System: 0.017 s]
Range (min … max): 3.360 s … 3.472 s 10 runs
Summary
./exe/ruby ../ruby2/test.rb ran
1.11 ± 0.02 times faster than ruby ../ruby2/test.rb
```
to adopt strict shareable rule.
* (basically) shareable objects only refer shareable objects
* (exception) shareable objects can refere unshareable objects
but should not leak reference to unshareable objects to Ruby world
The `FL_FREEZE` flag is redundant with `SHAPE_ID_FL_FROZEN`, so
ideally it should be eliminated in favor of the later.
Doing so would eliminate the risk of desync between the two, but
also solve the problem of the frozen status being global in namespace
context (See Bug #21330).
The inspect format was intentionally changed as an outcome of
[Bug #20433] [ruby-core:118668], but some documentation update
was missing, as [Bug #20962] pointed out. Update some output
examples that clearly use Hash#inspect.
