I have a standard form of TaxTransactionHistorySummary in Payroll module in AX 2012 R2 which have around 4 million records in it.
When i open the form, it takes around 5 minutes to open and when i checked the Form Data source comprises of 2 views and 2 queries in it.
I wanted to ask if there's a better way to improve the performance of the form or how can i handle this much amount of bulk data.
First you need to find what is causing the issue. For that you can use the performance monitoring tools. Example- Trace parser.
You could also raise a support issue to Microsoft (for a fix), if there are no customizations.