How many days would it take to hear on H1B decision after receiving a RFE

Hi,

I received a RFE on 1st of July. But still did not get a mail from my attorney asking for any proofs. Usually how many days would it take to hear on the USCIS decision after submitting the RFE? If i leave the company in the middle of the process and travel to US on H4 VISA, still will my VISA processing be continued? Can I search for job in US and apply for the transfer?

Thanks in advace.