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From "Gary Gregory (JIRA)" <>
Subject [jira] [Commented] (NET-519) Apache Commons Net 3.3 has a performance issue
Date Fri, 22 Nov 2013 01:23:35 GMT


Gary Gregory commented on NET-519:


Your report is pretty vague. Can you provide a test case to show us how you use the API? This
would let us all run the same code and see how performance differs from version to version.
Are you sure network latency is not an issue? A good test would be to have it all running
on the same machine or on machines "next" to each other on the same LAN.


> Apache Commons Net 3.3 has a performance issue
> ----------------------------------------------
>                 Key: NET-519
>                 URL:
>             Project: Commons Net
>          Issue Type: Bug
>          Components: FTP
>    Affects Versions: 3.2, 3.3
>         Environment: Windows 7
>            Reporter: Bambi Edgar Mota
>             Fix For: 3.4
> We use Apache Commons Net FTP 3.1. That version had a bug for transferring files with
size 0 that was resolved in Apache Commons 3.2.
> Apache Commons 3.2 and 3.3 however both have a performance problem for files that do
not have a size of 0.
> For example a 30MB file using 3.1 takes approximately 40 seconds on our system from point
A to point B. 
> Using Apache 3.3, the same file takes 2 minutes and 5 seconds. 
> Using Apache 3.2, the same file took over 4 minutes. 
> This is not acceptable. 
> If there are any workarounds, we would like to know. If not this is a major bug. 

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