CPU load tester for Sublime

burn.rb

# Sublime load test for https://github.com/SublimeTextIssues/Core/issues/1820
# On my 15" 2016 rMBP:
# 4 is not noticeable
# 8 is noticeable and just barely keeps up with typing
# 20 lags way behind my typing
NUM_PROCS = 20

def compute_things()
  sum = 0
  10_000.times do |i|
    (0..6).to_a.permutation do |p|
      sum += p.map { |e| e.to_f }.inject(:+)
    end
    print "." if i % 100 == 0
  end
  puts sum
end

(NUM_PROCS-1).times do
  fork { compute_things() }
end
compute_things()