int idx = arr[i] - min;
GBDT (tree-boosting algorithm): 1.1x-1.5x faster fit/predict than the treeboost Rust crate2, 24-42x faster fit/1-5x faster predict than Python’s xgboost
，这一点在雷电模拟器官方版本下载中也有详细论述
Building software at Google's scale is extraordinarily difficult, and the Gemini API inherited a key management architecture built for a different era. Google recognized the problem we reported and took meaningful steps. The open questions are whether Google will inform customers of the security risks associated with their existing keys and whether Gemini will eventually adopt a different authentication architecture.
let value = value in threshold matrix at (x, y)