又或者,在优化一个日志聚合模块时,发现数据量从10万暴增到500万,原本用 Arrays.sort () 稳如老狗的逻辑突然卡顿明显,监控显示CPU尖刺频发,而你翻遍日志却找不到性能瓶颈在哪,更不敢轻易动排序逻辑——因为怕改崩了。 这不是个别现象。
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