How does Parse Query.each count towards execution limits

Question

I am wondering how the each command on a Parse Query counts towards the request execution limits. I am building an app that will need to perform a function on many objects (could be more than 1000) in a parse class.

For example (in JavaScript),

var query = new Parse.Query(Parse.User);
query.equalTo('anObjectIWant',true); //there could be more than 1000 objects I want
query.each(function(object){
  doSomething(object); //doSomething does NOT involve another Parse request
});

So, will the above code count as 1 request towards my Parse application execution limit (you get 30/second free), or will each object (each recurrence of calling "each") use one request (so 1000 objects would be 1000 requests)?

Answer 1

I have evaluated the resource usage by observing the number of API requests made by query.each() for different result set sizes. The bottom line is that (at the moment of writing) this function is using the default query result count limit of 100. Thus if your query matches up to 100 results it will make 1 API request, 2 API requests for 101-200 and so forth.

This behavior can not be changed by manually increasing the limit to the maximum using query.limit(1000). If you do this you will get an error when you call query.each() afterwards (this is also mentioned in the documentation).

Therefore it has to be considered to manually implement this functionality (e.g., by recursive query.find()) which allows you to set the query limit to 1000 and thus, in the best case, only consumes one-tenth of the API requests query.each() would consume.