CODEWITHSUNDEEP
iosswiftperformanceparse-platform
Gabe
Gabe

Reputation: 168

Parse & Swift - How to Reduce Server Load/Requests?

I've been developing an application that has a home page, similar to that of Instagram's where the number of comments is displayed below a post as the user scrolls. Once the user taps on the label with the number of comments, the actuals comments will then load onto the screen. I've been trying to achieve something similar to that with my application, but I feel as if the method that I am doing this with is sending to many requests (queries) to the server in order to get the number of comments to display below each post. I was wondering if there was a more efficient/concise way to do this that would reduce the server load, but still have the same effect.

To add more context (Note: I'm using Parse):

Example code is below:

    let query = PFQuery(className: "Comments")
    query.whereKey("parentObjectID", equalTo: objectIDs[indexPathNums])

    query.order(byDescending: "createdAt")

    query.findObjectsInBackground { (objects, error) in
        if error != nil {
            print("An error occured (USQVC Comments Query)")
        }else {

            if let tempArray = objects {
                for comment in tempArray {

                    if let x = comment {

                        myArray.append(x)
                    }



                }
                commentsCount = myArray.count
                myArray.removeAll()
            }

        }
    }

Even though they've updated their UI, I just wanted to include a picture in case what I was describing was unclear:

enter image description here

I'd appreciate it if anybody could help me out with this. Thanks!

Upvotes: 0

Views: 259

Answers (1)

Dovahkiin
Dovahkiin

Reputation: 1239

As you pointed out in your comment above, you certainly can use the function incrementKey to increment the numberOfComments.

The best part is, this method is atomic, that means no matter how many people like the same post at the same time, say 5 people like a photo at exact same time, numberOfComments will increment by 5 instead of 1.

So this function will be executed one by one instead of concurrently. You absolutely can use it.

Upvotes: 2

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