| 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 |
The diff output is more specific:
[I]f a whole block of text is moved, then all of it, rather than just the beginning and end, is detected as changed.
>The algorithm described here avoids these difficulties. It detects differences that correspond very closely to our intuitive notion of difference.
| - (void)setupCaptureSession | |
| { | |
| NSError *error = nil; | |
| AVCaptureSession *session = [[AVCaptureSession alloc] init]; | |
| session.sessionPreset = AVCaptureSessionPresetMedium; | |
| AVCaptureDevice *device = [AVCaptureDevice | |
| defaultDeviceWithMediaType:AVMediaTypeVideo]; |
| #!/bin/sh | |
| echo Install all AppStore Apps at first! | |
| # no solution to automate AppStore installs | |
| read -p "Press any key to continue... " -n1 -s | |
| echo '\n' | |
| echo Install and Set San Francisco as System Font | |
| ruby -e "$(curl -fsSL https://raw.github.com/wellsriley/YosemiteSanFranciscoFont/master/install)" | |
| echo Install Homebrew, Postgres, wget and cask | |
| ruby -e "$(curl -fsSL https://raw.github.com/Homebrew/homebrew/go/install)" |
| // | |
| // TrimVideo.swift | |
| // VideoLab | |
| // | |
| // Created by Adam Jensen on 3/28/15. | |
| // Updated for Swift 5 (tested with Xcode 10.3) on 7/30/19. | |
| // MIT license | |
| // | |
| import AVFoundation |
| import Darwin | |
| extension Int { | |
| // Lazily computes prime factors | |
| public var primeFactors: AnySequence<Int> { | |
| func factor(input: Int) -> (prime: Int, remainder: Int) { | |
| let end = Int(sqrt(Float(input))) | |
| if end > 2 { | |
| for prime in 2...end { | |
| if input % prime == 0 { |
| //: | |
| //: UserDefaultable.swift | |
| //: | |
| //: Created by Andyy Hope on 18/08/2016. | |
| //: Twitter: @andyyhope | |
| //: Medium: Andyy Hope, https://medium.com/@AndyyHope | |
| import Foundation | |
| // MARK: - Key Namespaceable |
| // | |
| // MTLTexture+Z.swift | |
| // ZKit | |
| // | |
| // The MIT License (MIT) | |
| // | |
| // Copyright (c) 2016 Electricwoods LLC, Kaz Yoshikawa. | |
| // | |
| // Permission is hereby granted, free of charge, to any person obtaining a copy | |
| // of this software and associated documentation files (the "Software"), to deal |
| // Swift4 | |
| let image = UIImage(named: "sample") | |
| let data = image?.pngData() | |
| let data = image?.jpegData(compressionQuality: 0.9) | |
| let uiImage: UIImage = UIImage(data: imageData) | |
| // deprecated | |
| // var imageData: Data = UIImagePNGRepresentation(image) |
