File Download is Very Slow in VUGen Replay and also in Controller Execution

Hi to LR members,

Currently I am having the following issue.

 I am able to download a 1 GB file in 3-4 minutes with a downloadable URL in Chrome/IE browser. However, when I created a script using VUGEN, I noticed that the replaying of this VUgen script to download the same file is taking little over 40 minutes as response time and failing with Step download timeout error.It is observed the filedownload data is captured as

Action.c(100): $E\x13\x1A0\x05\xCF\x06\xB9\xD4\xD4\xF0\x8F\xD12\x04\x13\xE0\x0B=\xD1\\U\xE4\xDA\x98\x98

The corresponding request is

 web_custom_request("Team.docx_12", 
        "URL={FileDLToUse}",
        "Method=GET",
        "Resource=1", 
        "RecContentType=text/html", 
        //"Content-Type= text/html; charset=utf-8",        
        "Referer=", 
        "Snapshot=t300.inf", 
        LAST);

During replay, "Disabled logging" is specified in both the Controller and VUGEN replays. So, my concern is why the controller execution or VUgen replay is taking more time to download the file compared to filedownload in any browser. Even if we ignore stepdownload error, still the filedownload response time are higher.

 I would appreciate any suggestions to solve this very slow download problem with VUGen replay.