Do you want to see what references an object or address in memory? So 1 gig, 3 gigs, 4 gigs, 6 gigs, 7 gigs. And now, you know, I do want to come back to this beginImageContext WithOptions thing, but thinking back to what Kyle said, when you’re dealing with images, what’s the most important thing in terms of memory use? And the reason why is because multiplying the number of pixels wide by high, by , by 4 bytes per pixel gets you about 10 megabytes. You just pass malloc history, the Memgraph, and an address for an instance in memory, and, if there was a backtrace captured for it, it’ll give it to you. Well, we have to talk about how images work on iOS.
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And here we can see a quick example, applying a filter to our Sun. So even though Wop don’t see a big improvement, I know my code is still better for having made these changes. Well, we need to talk about pages. Our high-water mark in this case is 93 megabytes.
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You should all take a good look at me and give me the stink eye because now when the user has to go watch your app, you have to load from scratch. Aoo I go through each of these, none of ao; are clearly responsible for the, you know, 1 plus gigabytes of memory my app is using.
If there were, you know, multiple root view controllers, or multiple noir filters, or multiple filters in memory, more than I expect, that’s something else I could investigate. I have an extra this. And this last line here is actually the summary line again. Now, to find the backtrace for the allocation.
It tracks objects in the heap that aren’t rooted anywhere at runtime. So 1 gig, 3 gigs, 4 416aa, 6 gigs, 416w gigs. So I can see my app delegate is 32 bytes. Please check your Internet connection and try again. And ao, this actually brings up a good point, which is this would not fly on a device at all. Now, this is just a necessary part of linking frameworks, but if you maintain your own framework, singletons and global initializers are a great way to reduce ao amount of dirty memory they use because a singleton’s always going to be in memory after it’s been created, and these initializers are also run whenever the framework is linked or the class is loaded.
Cameras on the iPhone 7, 8, X, and the, some of the iPad Pros are great for capturing this high-fidelity content.
I think this is really, really useful. And then, once I’m stopped in the debugger, I want to go ahead and see the size of this image.
I’m going to go ahead and rebuild and wait for it to launch on the application. The app is not always the cause of a memory warning.
I think this is super cool, and I use it all the time. And the first — actually, let me bring this up a little bit — is to look for leaks.
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Now, alpha 8 just has 1 channel, 1 byte per pixel. So there’s still more I could do here, right. And, interestingly, it looks like my NoirFilter’s apply method here is creating that huge NS data.
Lines 6 through 9 actually come straight from my application code, and I can see here on line 6 that my NoirFilter apply function is what is responsible for creating this particular VM region. We really need to be good citizens, and be mindful of our memory use, and only use what we need.
One question I often ask myself is, where’s all my memory going? So let me see if I can find anything by trying that. I find this really useful for investigating the dirty memory size of my app.
However, if there was an opportunity aoop memory savings — for example, you know, if the operating system could determine that it could use fewer bytes per pixel or if it determined that it needed to use more, it would do the right thing, and I don’t need to worry about it.
Now, I checked in the documentation.
So if you leverage like the viewWillAppear and viewDidDisappear code or callbacks, you can keep your memory footprint smaller. What you may not have known is that you can use Memgraphs with a number of our command-line tools.