jboner

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

andreyvit

// call when zoom level or page size changes (i.e. after zooming or after rotation)
- (void)updateContentInsetForPageScrollView:(UIScrollView *)pageScrollView {
	UIImageView *imageView = (UIImageView *) [pageScrollView viewWithTag:TAG_IMAGE_VIEW];
	CGFloat zoomScale = pageScrollView.zoomScale;
	
	CGSize imageSize = imageView.bounds.size;
	CGSize zoomedImageSize = CGSizeMake(imageSize.width * zoomScale, imageSize.height * zoomScale);
	CGSize pageSize = pageScrollView.bounds.size;
	

KingOfBrian

//
//  KSDIdlingWindow.h
//
//  Created by Brian King on 4/13/10.
//  Copyright 2010 King Software Designs. All rights reserved.
//
// Based off: 
//  http://stackoverflow.com/questions/273450/iphone-detecting-user-inactivity-idle-time-since-last-screen-touch
//