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潜在Bug
- 随机数种子缺失: 移除了
math/rand包导入，但没有看到重新引入rand.Seed()的地方。如果代码中其他地方还使用了rand包，可能会导致随机数序列每次都相同，影响推荐结果的多样性。
建议
- 如果需要随机功能，请确保在程序启动时调用
rand.Seed(time.Now().UnixNano())来设置随机种子。
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功能变更分析
- 推荐算法逻辑改变: 删除了原有的随机打乱前一半元素并截取
recallCount个项目的逻辑，这改变了推荐结果的生成方式。
潜在问题
- 推荐多样性降低: 原来的随机打乱逻辑是为了增加推荐多样性，现在删除后可能导致每次返回的结果完全一致，用户体验下降。
- 算法意图不明确: 需要确认是否真的要移除随机化逻辑，如果是业务需求变更，需要确保相关方已知悉此变化。
bruceding
approved these changes
Mar 2, 2026
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分组热门召回随机打散截断改为排序后截断