How to improve Ruby structure for Shopify Script Performance

I'm using a Ruby in Shopify Scripts Editor to manage as a security measure Gift With Purchase (GWP) promotions.

The script current is:

• Checking if the Customer is logged in as a Professional or Unlogged
• Checking if there is a minimum amount spent in the cart
• Ensuring that only one "Gift" product is been added to the cart
• Removing a "Gift" product if the checkout doesn't have a "Discount Code" or the minimum set in the GWP_SETTINGS = [] obj.

The problem is that it's generating too much Production Errors like "Your script exceeded the time limit." and "Your script exceeded the cpu limit."

The current usage is CPU: 5% | Memory: 8% and it's increasing dizzyingly every time we add a new GWP promotion array.

Is there a better way to structure this logic so it takes less memory to process the entire order + GWP validation?

Here is the "Line Items" structure:

cart = Input.cart

PRO_TAG = 'professional-tag'
has_pro_tag = cart.customer && cart.customer.tags.include?(PRO_TAG)

GWP_SETTINGS = [
    gwp_1 = { 
        "variant_id" => 98989898989898,
        "discount_code" => "DISCOUNT_CODE_1",
        "minimum_requirement" => Money.new(cents: 50 * 100),
        "user_type" => "consumer"
    },
    gwp_2 = { 
        "variant_id" => 97979797979797,
        "discount_code" => "DISCOUNT_CODE_1",
        "minimum_requirement" => Money.new(cents: 50 * 100),
        "user_type" => "consumer"
    },
    gwp_3 = { 
        "variant_id" => 96969696969696,
        "discount_code" => "DISCOUNT_CODE_1",
        "minimum_requirement" => Money.new(cents: 50 * 100),
        "user_type" => "consumer"
    }
]

def remove_GWP(cart, variant_id)
  cart.line_items.each do |item|
    next if item.variant.id != variant_id
    index = cart.line_items.find_index(item)
    cart.line_items.delete_at(index)
  end
end

def ensure_only_one_GWP_is_added(cart, variant_id)
  cart.line_items.each do |item|
    next if item.variant.id != variant_id
    item.instance_variable_set(:@quantity, 1)
  end
end

GWP_SETTINGS.each do |gwp_item_settings|
    
    customer_has_discount = cart.discount_code && cart.discount_code.code == gwp_item_settings["discount_code"]
    customer_has_minimum = cart.subtotal_price >= gwp_item_settings["minimum_requirement"]
    gwp_is_for_professional = gwp_item_settings["user_type"] == "professional-tag"

    #UNLOGGED
    if customer_has_discount && customer_has_minimum
        ensure_only_one_GWP_is_added(cart, gwp_item_settings["variant_id"])
    else
        remove_GWP(cart, gwp_item_settings["variant_id"])
    end

    #PRO
    if gwp_is_for_professional && has_pro_tag
      if customer_has_discount && customer_has_minimum
          ensure_only_one_GWP_is_added(cart, gwp_item_settings["variant_id"])
      else
          remove_GWP(cart, gwp_item_settings["variant_id"])
      end
    end

end

Output.cart = cart