Reduce alpha,beta unnecessary d2h #17
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When I use this library, I find that there are many D2H copies of 4bytes, which occurs in self.a.item (), since a needs to be worn back to the cpu in the gpu memory to fetch the value, I fixed alpha and beta in the cpu after initialization. Fixed this bug, which improved by 6% in my test scence(It is not strictly compared, but the whole under the llm model.).
@Guangxuan-Xiao