I have huge files (4.5 GB each) and need to count the number of lines in each file that start with a given token. There can be up to 200k occurrences of the token per file.I have huge files (4.5 GB each) and need to cou
阅读背景：
在Java中计算以巨大文件中的String开头的行的最快方法是什么
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