| Latency Comparison Numbers (~2012) | |
| ---------------------------------- | |
| L1 cache reference 0.5 ns | |
| Branch mispredict 5 ns | |
| L2 cache reference 7 ns 14x L1 cache | |
| Mutex lock/unlock 25 ns | |
| Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
| Compress 1K bytes with Zippy 3,000 ns 3 us | |
| Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
| Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |
| i386 : iPhone Simulator | |
| x86_64 : iPhone Simulator | |
| arm64 : iPhone Simulator | |
| iPhone1,1 : iPhone | |
| iPhone1,2 : iPhone 3G | |
| iPhone2,1 : iPhone 3GS | |
| iPhone3,1 : iPhone 4 | |
| iPhone3,2 : iPhone 4 GSM Rev A | |
| iPhone3,3 : iPhone 4 CDMA | |
| iPhone4,1 : iPhone 4S |
| var mediaJSON = { "categories" : [ { "name" : "Movies", | |
| "videos" : [ | |
| { "description" : "Big Buck Bunny tells the story of a giant rabbit with a heart bigger than himself. When one sunny day three rodents rudely harass him, something snaps... and the rabbit ain't no bunny anymore! In the typical cartoon tradition he prepares the nasty rodents a comical revenge.\n\nLicensed under the Creative Commons Attribution license\nhttp://www.bigbuckbunny.org", | |
| "sources" : [ "http://commondatastorage.googleapis.com/gtv-videos-bucket/sample/BigBuckBunny.mp4" ], | |
| "subtitle" : "By Blender Foundation", | |
| "thumb" : "images/BigBuckBunny.jpg", | |
| "title" : "Big Buck Bunny" | |
| }, | |
| { "description" : "The first Blender Open Movie from 2006", | |
| "sources" : [ "http://commondatastorage.googleapis.com/gtv-videos-bucket/sample/ElephantsDream.mp4" ], |
| extension UIImage { | |
| func fixedOrientation() -> UIImage { | |
| if imageOrientation == UIImageOrientation.Up { | |
| return self | |
| } | |
| var transform: CGAffineTransform = CGAffineTransformIdentity | |
The script in this gist will help you buid the Google Protobuf library for use with Mac OS X and iOS. Other methods (such as homebrew or direct compilation) have issues that prevent their use. The libraries built by this script are universal and support all iOS device architectures including the simulator.
This gist was adapted from the original at https://gist.github.com/BennettSmith/7150245, and updated to deal with Xcode 7 and iOS 9, and download protobuf version 3.0.0.
Picking the right architecture = Picking the right battles + Managing trade-offs
| CVImageBufferRef imageBuffer = CMSampleBufferGetImageBuffer(sampleBuffer); | |
| CVPixelBufferLockBaseAddress(imageBuffer,0); | |
| size_t height = CVPixelBufferGetHeight(imageBuffer); | |
| size_t width = CVPixelBufferGetWidth(imageBuffer); | |
| size_t bytesPerRow = CVPixelBufferGetBytesPerRow(imageBuffer); | |
| void *sourceData = CVPixelBufferGetBaseAddress(imageBuffer); | |
| // Set a bunch of variables we need. The "radius" for the blur kernel needs to be positive and odd. The permute map maps the BGRA channels of the buffer to the ARGB that vImage needs. |
| // Fetch entities | |
| let fetchRequest = NSFetchRequest(entityName: "Note") | |
| var sortDescriptor = NSSortDescriptor(key: "text", ascending: false) | |
| fetchRequest.sortDescriptors = [sortDescriptor] | |
| let predicate = NSPredicate(format: "MyEntityAttribute == %@", "Matching Value") | |
| fetchRequest.predicate = predicate |
| //DNS Query Program on Linux | |
| //Author : Silver Moon ([email protected]) | |
| //Dated : 29/4/2009 | |
| //Header Files | |
| #include<stdio.h> //printf | |
| #include<string.h> //strlen | |
| #include<stdlib.h> //malloc | |
| #include<sys/socket.h> //you know what this is for | |
| #include<arpa/inet.h> //inet_addr , inet_ntoa , ntohs etc |
| //DNS Query Program on Linux | |
| //Author : Silver Moon ([email protected]) | |
| //Dated : 29/4/2009 | |
| //Header Files | |
| #include<stdio.h> //printf | |
| #include<string.h> //strlen | |
| #include<stdlib.h> //malloc | |
| #include<sys/socket.h> //you know what this is for | |
| #include<arpa/inet.h> //inet_addr , inet_ntoa , ntohs etc |
