javascript - How costly are trips to server for single page applications? -


I am creating a single page app that will run on your average tablet, so the resources are not very comprehensive.

I am initially thinking about retrieving all the data needed for the application and storing it in TaffyDb - the local Javascript database - and instead of doing a local query every time a user Point to the event handler. / P>

I was wondering who would be better in terms of speed / memory. All data is stored locally on TaffyDb, or is recovering the required information every time. Data is simple JSON objects, maximum 10.

I have seen an estimate that approximately 40,000 machine instructions for executing the cost of each HTTP request

  1. Connected (all the time) This is very dear on mobile phones.

    But I'm focusing on another aspect -;

  2. Disconnect occasionally;
  3. Occasionally connected;
  4. Disconnected.

Each case needs its strategy, for example # 3 will definitely mean local dB and some synchronization. For # 2 this is enough to do some local caching with ordinary 15 minutes (or so) end time.

It looks like you choose # 3. You need to think about the client / server synchronization. It may not be too slight on some data architecture.


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