General question using the JS object and JSON in an interactive PDF form

I am presently using a JS object to store data used to populate (text) form field values residing on an interactive PDF form. To make this work, the JS object is converted to a JSON string stored inside a hidden (text) form field. The JSON object is parsed and converted to a JS object when the PDF form first opens ready for use. This noted, I am wanting to know if it's actually necessary/unnecessary to stringify and save the JS object in JSON format to the hidden (text) form field following each and every change made to the data stored in the JS object or is it sufficient to wait until the session ends when the PDF form is closed/saved and no longer in use to stringify and save the JS object to the hidden text form field? I myself do not believe it is necessary to stringify and save the JS object susequent to each and every change made to the JS object property name-values in using an interactive PDF form. Your comments/suggestions regarding this subject matter are most appreciated. Thank you ahead of time.