Rule loaded per item
Review this Python function that resolves and applies a discount rule for each item in a large cart batch. `load_rule` is an expensive parse of a rule blob.
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1def price_items(items):
2 out = []
3 for item in items:
4 rule = load_rule(item.rule_id) # expensive: parses + compiles the rule
5 out.append(rule.apply(item.price))
6 return out
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