java - Behaviour DataInputStream into mapping -

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i had problems save file disk. path save, in environment, it's mapping (the disk in server). a - when try save datainputstream loop, reading "byte per byte", takes lot of time (~12 min / mb). b- now, read passing byte[8192]. solve problem. know b faster a but, when run same code, trying save local disk, there no difference, both take same time. why mapping takes lot of time? read byte[8192] @ time can cause problems?

tks!


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