Android, performance of transferring data between activities

Question

Which one of two ways below has better performance for transferring data between activities?

Activity1: putExtra("id" , customerId)

Activity2: Select on the table and fill Customer object
Activity1: putExtra("customer", customer)

Activity2: Customer customer = (Customer)getIntent().getExtras().getSerialaizable("customer");

I mean send a unique item (like id) to the next activity and then select it from data base OR send the whole object to the next activity and cast it?

depends on what you want in your next activity. If you only want a single id then why send all data of Customer to next activity. — Vivek Mishra, Aug 22 '16 at 05:26
The answer in this link will be helpful http://stackoverflow.com/questions/37208243/how-to-pass-list-object-between-fragment/37208349#37208349 — Sreehari, Aug 22 '16 at 06:14

score 1 · Answer 1 · answered Aug 22 '16 at 17:14

Obviously first way. You just send the ID of the object and then read it from the database in second Activity. The other way involves serialization/deserialization which costs CPU-cycles. Even using Parcelable will still use significant CPU-cycles.

On the other hand, I doubt that you would notice any performance penalties unless you are doing this for a bazillion objects. Do whatever is more straightforward and easier to understand/maintain.

score 0 · Answer 2 · answered Aug 22 '16 at 05:37

Serializable is not recommended in android, check parcelable it's faster.

Serialization vs DB depends on object complicity, only profiling can show the picture, but for a one object it's neglectable.

The fastest way would be to store object in memory and share through singleton.

Android, performance of transferring data between activities

2 Answers2