loop vs. while

require 'timeout'

lc = 0
begin
  Timeout.timeout(0.5) { loop { lc += 1 } }
rescue Timeout::Error
end

wc = 0
begin
  Timeout.timeout(0.5) { wc += 1 while true }
rescue Timeout::Error
end

p wc / lc.to_f

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loop vs. while

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