Flux - How to create store for form fields? How to handle form field state? More than 500 form fields. fields value update gets slow

Question

I am trying to create form using React Flux. Steps

1. Rest api to get form fields Information
2. In componentdidupdate i call action to update form fields information into store
3. Form gets rerender fine
4. I pass action to form fields when form fields change i update the form fields using action and update the store and it gets rerender

Problem If my form contains more than 500 fields fields update its getting slow

action

create_form update_form_field_value

store

var _form_field_info=[{id:"t1",type:"text",value:""}, {id:"t2",type:"text",value:"default value"} ]; 

get_form_field() return _form_field_info 

_setFieldValue(index,val) set _form_field_info[index].t1.value=val

View

<FormContainer> 
  <Form {...formFields} {...actions}/> 
</FormContainer> 

<Form> 
iterate fields 
<Form.Input {...formField} {...actions}/> ... 
iterate end 
</Form> 

Thanks....