Can the performance of parsing a JSON dataset be affected by having empty arrays within it?

As I work my way through a rather extensive JSON data set with the help of DoT.js to generate a display template, I've noticed something intriguing. There are more than 3400 empty arrays present in a section of the JSON that is not being utilized for populating the template. Below is a snippet illustrating this unused JSON segment:

,"COMMENTS":[]

Although I'm ignoring this part in terms of template population, I do pass through it in an earlier stage of my code to ensure all keys throughout the entire JSON are converted to lowercase:

,"comments":[]

The question that arises is whether having an empty array like this has any negative impact on performance?

javascriptjsontemplatesdot.js

Answer №1

Absolutely, the impact on performances is noticeable. Not only will data transfer be slightly delayed, but JSON parsing will also exhibit slower speeds.

For an interesting performance test on JSON empty arrays, check out this link: http://jsperf.com/json-empty-arrays-perf

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