Bandwidth limit between haproxy frontend and apache backend

Hi to all, sorry for my probably noob question but anyway… there is a sort of bandwidth limitation in haproxy for incoming upload through https and backend apache server in http? my installation is like this

internet<----->haproxy(https offload)<---->apache (backend http)

between haproxy and apache machine (misured with iperf) thereis 1Gbit conn used 901Mbit/s but when i upload some files through frontend i reach max 112Mbits/s
Thanks in advance on helping me.

No, there is no bandwidth limitation in haproxy.