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2014/10/15 ¤U¤È 10:12:32
iphone Programming Glossary: penaltyHow do I create a mutable array of CGImageRefs? http://stackoverflow.com/questions/1392321/how-do-i-create-a-mutable-array-of-cgimagerefs invoking this method forces that data to be loaded back into memory. Reloading the image data may incur a performance penalty. If you feel comfortable with mixing C and Objective C you can use a std vector for storing the CGImageRef. Rename your..
Core Data: UIManagedDocument or AppDelegate to setup core data stack? http://stackoverflow.com/questions/14876988/core-data-uimanageddocument-or-appdelegate-to-setup-core-data-stack design generally works well. NSManagedObjectContext is a very lightweight object so there isn't a real performance penalty keeping it around. However if you need to do Core Data stuff on other threads the design needs to change a bit. From Apple's..
How can I encrypt CoreData contents on an iPhone http://stackoverflow.com/questions/1645007/how-can-i-encrypt-coredata-contents-on-an-iphone each entity would be slower than the decryption process for the properties so you won't see that much of a performance penalty when accessing the properties. Transformable properties like this are very easy to use because you read and write to them..
removing jagged edges of my ropes using antialiasing of OpenGLES http://stackoverflow.com/questions/17500418/removing-jagged-edges-of-my-ropes-using-antialiasing-of-opengles get rid of the edges of textures. Multisampling will act on the entire screen and enabling it will have a performance penalty most severely on older devices iPhone 3GS . Locate the line where CCGLView is instantiated in AppDelegate and enable multi..
http://stackoverflow.com/questions/4473894/alternatives-to-creating-an-opengl-texture-from-a-captured-video-frame-to-overla be composited correctly by Core Animation. Blending OpenGL ES content on top of other content has a severe performance penalty. Honestly it really isn't that hard to pull in the video as a texture and then display that as a billboard behind your 3..
UIScrollView pauses NSTimer until scrolling finishes http://stackoverflow.com/questions/605027/uiscrollview-pauses-nstimer-until-scrolling-finishes
Why is autorelease especially dangerous/expensive for iPhone applications? http://stackoverflow.com/questions/613583/why-is-autorelease-especially-dangerous-expensive-for-iphone-applications point of view that autorelease is slightly more expensive than a simple call to release but I don't think that small penalty is enough to make Apple recommend against it. What's the real story iphone objective c performance autorelease share..
http://stackoverflow.com/questions/8234981/make-the-iphone-screen-dim
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