Issue #19461 has been updated by PvpDJgHP (— PvpDJgHP).
In Dec 2016, someone investigated a related question and posted here:
https://stackoverflow.com/questions/41353532/41371753#41371753
This person's findings may be helpful.
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Bug #19461: Time.local performance tanks in forked process (on macOS only?)
https://bugs.ruby-lang.org/issues/19461#change-102017
* Author: ioquatix (Samuel Williams)
* Status: Open
* Priority: Normal
* Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN
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The following program demonstrates a performance regression in forked child processes when
invoking `Time.local`:
```ruby
require 'benchmark'
require 'time'
def sir_local_alot
result = Benchmark.measure do
10_000.times do
tm = ::Time.local(2023)
end
end
$stderr.puts result
end
sir_local_alot
pid = fork do
sir_local_alot
end
Process.wait(pid)
```
On Linux the performance is similar, but on macOS, the performance is over 100x worse on
my M1 laptop.
--
https://bugs.ruby-lang.org/