Rithmic connection CPU Usage & Refreshspeed of SubscribeMarketDepth

Dear S# Community,

i have a question regarding the S# Rithmic Connection. I have realised that it needs a lot of CPU Usage (up to 50%) when i am subscribing to the SubscribeMarketDepth.
It seems the method is sync and is blocking the other threads in between. It would be better to call it async but that is not implemented right now in s#[crying].

Does anybody make the same experience?

Also the second question i have is about the refreshspeed of this subscription. https://doc.stocksharp.c...ubscribeMarketDepth.htm

i gave a refreshspeed of 3 seconds,but it seems the data update comes more frequently, less than 1 second i guess.

TimeSpan span = new TimeSpan(0, 0, 0, 3, 0);
Connector.SubscribeMarketDepth(security, null, null, null, MarketDataBuildModes.LoadAndBuild,null, 25, span, null, false, null);

Am i using it wrong?

Thanks in advance & best regards
Tobias