[pull] master from ruby:master #536
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…ng options as second argument Otherwise it's very error prone. ruby/json@c54de70f90
When serializing an Array, and one of the elements of the Array requires calling `to_json`, if the depth is changed, it will be used for the next entries, which wasn't the case before ruby/json@5abd43490714, and is not the case with TruffleRuby and JRuby. Additionally, with TruffleRuby and JRuby the state's depth after the `to_json` call is used to close the Array, which isn't the case with CRuby. ruby/json@386b36fde5
The "EXIVAR" terminology has been replaced by "gen fields" AKA "generic fields". Exivar implies variable, but generic fields include more than just variables, e.g. `object_id`.
The NEWOBJ tracepoint can generate an object_id, that's alright, what we don't want is actual instance variables.
While profiling `Monitor#synchronize` and `Mutex#synchronize`
I noticed a fairly significant amount of time spent in
`rb_check_typeddata`.
By implementing a fast path that assumes the object is valid
and that can be inlined, it does make a significant difference:
Before:
```
Mutex 13.548M (± 3.6%) i/s (73.81 ns/i) - 68.566M in 5.067444
Monitor 10.497M (± 6.5%) i/s (95.27 ns/i) - 52.529M in 5.032698s
```
After:
```
Mutex 20.887M (± 0.3%) i/s (47.88 ns/i) - 106.021M in 5.075989s
Monitor 16.245M (±13.3%) i/s (61.56 ns/i) - 80.705M in 5.099680s
```
```ruby
require 'bundler/inline'
gemfile do
gem "benchmark-ips"
end
mutex = Mutex.new
require "monitor"
monitor = Monitor.new
Benchmark.ips do |x|
x.report("Mutex") { mutex.synchronize { } }
x.report("Monitor") { monitor.synchronize { } }
end
```
… by heredocs See https://bugs.ruby-lang.org/issues/21756. Ripper fails to parse this, but prism actually also doesn't handle it correctly. When heredocs are used, even in lowercase percent arays there can be multiple `STRING_CONTENT` tokens. We need to concat them. Luckily we don't need to handle as many cases as in uppercase arrays where interpolation is allowed. ruby/prism@211677000e
Not so sure how to trigger it but this is definitly more correct. ruby/prism@1bc8ec5e5d
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