用 s2sphere 库做了一个 odps udf 函数，运行的巨慢，会是什么原因？
同样都是空间地理算法，geohash 就很快，Google S2 是要比 geohash 复杂，但同样是 10 亿行，用 geohash 只跑了十几分钟，用 s2 跑了 19 小时才跑 30%🤣
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