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我遇到了一个奇怪的scala-iomoveTo方法问题。这里是我的文件系统，tmp目录驻留在RAM中。scala-io，从tmpfs移动文件太慢
~ % df -Th ~/ :) Filesystem Type Size Used Avail Use% Mounted on rootfs rootfs 112G 18G 89G 17%/ /dev devtmpfs 3.9G 0 3.9G 0% /dev run tmpfs 3.9G 236K 3.9G 1% /run /dev/sda btrfs 112G 18G 89G 17%/ shm tmpfs 3.9G 872K 3.9G 1% /dev/shm tmpfs tmpfs 3.9G 34M 3.9G 1% /tmp
当从tmp移动文件到主目录或向后，第一是WERY慢（主观约1M/s，而iotop显示荒谬1500M/s）的，第二它会导致100％的CPU负荷。在同一个文件系统中移动文件时，一切都按预期工作。
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scala> import scalax.file.Path
import scalax.file.Path
scala> val tmp = Path("/tmp/ensime")
tmp: scalax.file.Path = Path(/tmp/ensime)
scala> tmp.exists
res0: Boolean = true
scala> val home = Path("/home/_4e6/dest")
home: scalax.file.Path = Path(/home/_4e6/dest)
scala> home.exists
res1: Boolean = false
scala> tmp.moveTo(home) // very slow
res2: scalax.file.Path = Path(/home/_4e6/dest)
scala> home.moveTo(tmp) // a bit faster but still unsatisfactory
res3: scalax.file.Path = Path(/tmp/ensime)
此外，copyTo方法工作正常; replace和atomicMove标志不会改变任何东西;和ramfs不适合我。
scala> val fs = scalax.file.ramfs.RamFileSystem()
fs: scalax.file.ramfs.RamFileSystem = Ram File System
scala> val ramTmp = fs("/tmp/ensime")
ramTmp: scalax.file.Path = RamPath(/tmp/ensime)
scala> ramTmp.exists
res9: Boolean = false