Use the COPYFILE_FICLONE constant

[sindresorhus]

For faster copy.

https://nodejs.org/api/fs.html#fs_fs_copyfile_src_dest_flags_callback

[wmertens]

Just wondering how this would be implemented:

• check if COPYFILE_FICLONE flag exists
• if so, call fs.copyFile and emit progress 0, then progress 100% on completion

For the sync version, just add the flag if it exists

Right?

[sindresorhus]

Let's wait a little bit with this. It has some issues: nodejs/node#27273

[wmertens]

Since the problem will always exist with the current Node versions, how about working around it keyed by version and platform?

[sindresorhus]

Since the problem will always exist with the current Node versions

Current patch versions, you're right, but the Node.js team backports fixes all the time, so might be fixed in a patch/minor Node.js 8 version. I prefer to hold on for a bit and see if they'll do.

[sindresorhus]

If anyone wants to work on this, see the initial attempt and feedback in #40.