instruments

I have followed the Apple steps to get my app energy usage level from my device using Energy Diagnostics Instruments (https://developer.apple.com/library/ios/#documentation/DeveloperTools/Conceptual/InstrumentsUserGuide/Built-InInstruments/Built-InInstruments.html#//apple_ref/doc/uid/TP40004652-CH6-SW63). I have tried with my own app and with several apps from the AppStore and I always get all the info expected (including time flags) except the Energy Usage Info. Simply, the Energy Usage Bar doesn't show any graph (it does show the running time) and the Energy Consumption table (detail view)

When I monitor my application using instruments and the instrument "allocations" I see a big amount of memory being marked as "dirty". What does that mean? I have no memory leaks in my application yet this pile of "dirty" memory keeps increasing. Dirty is a computer term used to denote cached data that needs to be sync'ed with the main memory. Don't worry, since this is automatically done by the hardware. "...I am trying to find out what is using up all my memory." The WWDC 2010 Session 311 presentation, Advanced Memory Analysis with Instruments , includes a section on 'Responding to Memory

I have a strange memory issue I'm having problems resolving and would appreciate some advice as to where else to look. The program I have (iPhone App) has a function whereby it basically downloads loads of files, processes those that are JSON, and stores the rest to disk. The JSON processing is CPU intensive and can take several seconds per file, so I have a NSOperationQueue with maxConcurrency limited to 1 that handles all the heavy lifting, and a queue that manages the multiple files to download. Ever since iOS5 came out, the App has had problems completing the download sequence without

I'm trying to avoid blended layers on iOS to improve performance. However, I notice that the resizable image I'm using for the backgroundView of my UITableViewCell is being marked as a blended layer: In fact, using any resizable image--even a JPEG with no transparency--caused layer blending, as seen in this screenshot where first a PNG and then a JPEG is used as a resizable image in a UIImageView . The only resizable image that didn't require a blended layer was a 1x1 pixel image, seen at the bottom: Is there any way to avoid this? Core Animation profiling is imprecise art (atleast to me), but

I'm using Allocations template to profile my app on iPhone, but VM Tracker is always empty. Why? How to make it show data? You have to tell it to take snapshots periodically. Before starting the app... Click on the VM Tracker Instrument to activate it. Show the Detail View (Command-D) if you don't see it already. In the left (blue) side bar, activate "Automatic Snapshotting". Run. Optionally you can choose to take snapshots manually before and after interesting events in your app. In Xcode 10, this option is located at the bottom of the window, the “Snapshots” button: 来源： https://stackoverflow

In WWDC 2012 Session 506, they display the frames per second on a UILabel in the application, without having to use the Core Animation profiler attached to instruments. I would like to do this for convenience as well as to let other members of my team monitor FPS as they use the app in real-world scenarios. Unfortunately, session 506 isn't included the the WWDC '12 sample code. Does anyone know how to do this? I know that Cocos2D has this capability in their CCDirector , but their approach seems specific to how Cocos2D rendering works. It is not necessary for it to be public API because I will

I used the AVPlayerDemo sample from the Apple docs and wrote my own UI on top of it to play videos selected from a UITableViewController. Now, the problem is that there's a memory leak here somewhere which I can't find out. The problem is that the AVPlayer object is not being dealloced, I guessed this because every time a press back button and select a new video to play, there is a huge jump in the total memory consumed by the app which is show here: The first time the video is player, the memory usage is 36.6MB, now for the second time: Here it has jumped to 58.2MB, and keeps on increasing

For opening Instruments we must profile first then select which template we have to profile memory leaks,allocations,zombies. But still I get the error allocations library was not loaded, and could not see the stack trace also. And could not find the reason of leak in the application As mentioned solution in other links, I am using both simulator (iOS7), and active scheme (iOS7) Xcode Version:Version 5.0.2 (5A3005) Simulator: iOS 7.0.3 (111B508) Mac: OS X Version 10.8.5 Please excuse if any information above is incorrect. Please give answers..Thanks in advance user3838999 I'm running into the