The performance of transferring file is bad

[zhanghaiyang9999]

Compare to scp command, use same file and same source and destination hosts.
SCP command:
scp localfile root@remotehost:/root/test
it took 30seconds
use linux sftp tool it aslo took about 30 seconds.

but with this go/sftp package, it took 90 seconds.

there is any optimization method? thanks!

[puellanivis]

Are you using UseConcurrentWrites and/or UseConcurrentReads