Nick Craig-Wood c3af0a1eca local: only calculate the required hashes for big speedup
Before this change we calculated all possible hashes for the file when
the `Hashes` method was called.

After we only calculate the Hash requested.

Almost all uses of `Hash` just need one checksum.  This will slow down
`rclone lsjson` with the `--hash` flag.  Perhaps lsjson should have a
`--hash-type` flag.

However it will speed up sync/copy/move/check/md5sum/sha1sum etc.

Before it took 12.4 seconds to md5sum a 1GB file, after it takes 3.1
seconds which is the same time the md5sum utility takes.
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Rclone

Rclone ("rsync for cloud storage") is a command line program to sync files and directories to and from different cloud storage providers.

Storage providers

Please see the full list of all storage providers and their features

Features

  • MD5/SHA-1 hashes checked at all times for file integrity
  • Timestamps preserved on files
  • Partial syncs supported on a whole file basis
  • Copy mode to just copy new/changed files
  • Sync (one way) mode to make a directory identical
  • Check mode to check for file hash equality
  • Can sync to and from network, e.g. two different cloud accounts
  • Optional encryption (Crypt)
  • Optional cache (Cache)
  • Optional FUSE mount (rclone mount)

Installation & documentation

Please see the rclone website for:

Downloads

License

This is free software under the terms of MIT the license (check the COPYING file included in this package).

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