d3.js box plot not able to handle large dataset

I am using d3.js , when calling box plot function with small dataset its working fine, but its not working with large dataset (like 9 Lac data). I tried with many data set but its only working with small set of data and its getting hang on large set of data. I tried to debug the d3.js script for box plot but was not able to find where the dataset becomes null. Does the performance of d3.js graphs degrade with increase in dataset? If so, then how can we optimize it?