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# calibrate default cost to be at least 50ms (performance-wise safe)
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new_cost = BCrypt::Engine.calibrate(50)
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# keep minimum reasonable cost in case CPU was busy
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new_cost = 5 if new_cost < 5
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# and set it if it's higher than current cost
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current_cost = Setting[:bcrypt_cost]
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if current_cost.nil? || current_cost < new_cost
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Setting[:bcrypt_cost] = new_cost
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end
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