Hi! I'm using plugin 

http://wiki.jenkins-ci.org/display/JENKINS/Amazon+EC2+Plugin

it is latest version 1.39.

Slave node is Windows 2016R2 and master node is centos6. 

When I ran my test by WinRM there was my test took very much time. If i use just JNLP connection protocol tests is take little bit time. There aren't any errors in jobs logs.

Settings for winrm:

winrm set winrm/config/service/Auth @{Basic="true"}
winrm set winrm/config/service @{AllowUnencrypted="true"}
winrm set winrm/config/winrs @{MaxMemoryPerShellMB="1024"}

there is slave server in aws and has m3.medium shape. I'm repeat when I run test via  JNLP performance is good. 

it is very similare problem https://issues.jenkins-ci.org/browse/JENKINS-32547 

There are logs from my job:

*09:40:05* Started by user 
[Andrei|http://infra1:8080/user/a.zak]
*09:40:05* [EnvInject] - Loading node environment variables.
*09:43:01* Building remotely on 
[zak-test (sir-5w48619k)|http://infra1:8080/computer/zak-test%20(sir-5w48619k)]
 (zak-test) in workspace c:\jenkins\workspace\AT_PES_test_zak
--
The process took 10 minutes.
--
*09:53:50* Cloning the remote Git repository*09:53:58* Cloning repository git@bitbucket.org:repo/automation.git*09:54:02*  > git init c:\jenkins\workspace\AT_PES_test_zak # timeout=10