ML Context IDataView Issue

Question

I have a json array in string format which I need to convert it into the IDataView for the further processing. But While creating a data model and making the IEnumerable out of it takes a lot of processing time and is not scalable according to my use case where I use ZMQ and the requests for processing the data is too much per minute and hence creating IEnumerable and then converting it into IDataView and then processing takes a lot of my cpu time.

Is there any way around for this?

The json array which I am talking about contains my data points of time series and that I need to use for analysis of the time series.