Variables Performance

Performance of a variable read and write operations dramatically depends on "nature" of the variable and underlying algorithms. Here are some examples:

  • Retrieving value of a cached device setting variable is very fast, even millions of read operations per second will have no significant CPU load impact. Same applies for writing new value of the variable, since the actual device I/O will be delayed and the call returns asynchronously.
  • Retrieving properties of widget components is also very fast.
  • Reading data variable from a Query context triggers query execution, involving associated CPU and memory load.
  • If value of any remote variable was requested (e.g. an Iotellect Client has requested it from an Iotellect Server or a consumer server has requested it from a provider server in a distributed environment), additional time will be required to send a corresponding request to the remote server and get the response. This time is generally equal to network round-trip time reported by ping command.

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