Poor performance SFTPing files

[valenciaj]

I try to copy from my server to local thru ssh2.cr and I observe a poor performance like this:

javier@XXXXXX:~/projects/crystal/backuper$ time ./backuper ~/.ssh/id_rsa awscli-bundle.zip 
11648371 bytes writed.

real	0m27,632s
user	0m0,568s
sys	0m0,204s

There are a better way to copy file than IO.copy from channel to File?

[valenciaj]

Doing a cat on file instead SFTP:

javier@jvdesk:~/projects/crystal/backuper$ time ./backuper ~/.ssh/id_rsa awscli-bundle.zip 
11648371 bytes writed.

real	0m6,496s
user	0m0,403s
sys	0m0,270s