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leetcode代码优化经验 #1

Open 349989153 opened 4 years ago

349989153 commented 4 years ago

1、某个需要计算的固定值，用变量存起来，而不是每次都去算。 例如：

while (result.length < rowLength * colLength) {}

此条花费156ms

而

const size = rowLength * colLength;
while (result.length < size) {}

仅花费96ms