I convert my repository to git-lfs and try to make simple checkout:

• Linux: 1436 sec
• Windows: 4970 sec

Git repository is accessible by ssh protocol. LFS-server is defined by simple git-lfs-authenticate script:

#!/bin/sh
echo '{
  "href": "http://git.test.local:9999/test/test",
  "header": {
    "Authorization": "Basic dGVzdDp0ZXN0"
  }
}'

The main performance issues:

• git-lfs for every file establish new ssh connection and executes git-lfs-authenticate command (aditional ~0.3 sec per file on Windows, ~0.2 sec per file on Linux);
• git-lfs for every file executed as separate process (additional ~0.2 sec per file on Windows);

It should be noted that in the case of:

• if the git-lfs-authenticate knows how files are stored, then he could immediately return the "download" section and save one HTTP request;
• if the git-lfs-authenticate don't knows how files are stored, it always returns the same result.

In addition, processing each file in a separate process does not allow reusing HTTP connections.

Working copy contains 4231 LFS files (total size: 3.6G).
All data hosted in local gigabit network. I am sure that in the case of slower network results will be much sadder.

Versions:

• Windows test:
  • Windows 8.1
  • git-lfs: 0.5.1
  • git: 1.9.5.msysgit.1
  • ssh: OpenSSH_6.6p1, OpenSSL 1.0.1f 6 Jan 2014
• Linux test
  • Ubuntu 14.04.2 LTS
  • git-lfs: 0.5.1
  • git: 1.9.1
  • ssh: OpenSSH_6.6.1p1 Ubuntu-2ubuntu2, OpenSSL 1.0.1f 6 Jan 2014