What Abigail said.

But also, consider the relative cost of your various questions. If you connect to a URL, whether once, or every five minutes, who cares which method of counting key/value pairs is faster? Connecting to a URL will take a significant number of milli-seconds or even seconds. Any method of counting pairs will take microseconds, unless your data set is unusually large.

I guess that's another way of saying that if you profiled your program, you would find what questions were significant to consider.

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