1.数组对象都是Array的子类,Array是一个抽象类,不能显示实例化,Array提供了大量操作数组的静态方法 2.ArrayList其实是内部封装了一个array,实现了IList的接口.add remove在内部还是调用array的方法. 于Array最大的区别是,ArrayList的长度是自管理的,Array的长度是固定的. 3.synclist本质上还是用lock操作icollect的syncroot System.Threading.Interlocked.CompareExchan…

本文是Unity官方教程,性能优化系列的第三篇<Optimizing garbage collection in Unity games>的翻译. 相关文章: Unity性能优化(1)-官方教程The Profiler window翻译 Unity性能优化(2)-官方教程Diagnosing performance problems using the Profiler window翻译 Unity性能优化(3)-官方教程Optimizing garbage collection in Uni…

介绍 当我们的游戏运行时,它使用内存来存储数据.当不再需要该数据时,存储该数据的内存将被释放,以便可以重用.垃圾是用来存储数据但不再使用的内存的术语.垃圾回收是该内存再次可用以进行重用的进程的名称. Unity使用垃圾回收作为管理内存的一部分.如果垃圾回收发生得太频繁或者有太多工作要做,我们的游戏可能会表现不佳,这意味着垃圾回收是导致性能问题的常见原因. 在本文中,我们将了解垃圾回收如何工作的,什么时候发生垃圾回收,以及如何有效地使用内存,从而最小化垃圾回收对游戏的影响.   诊断垃圾回收的问题…

I believe that the following Python code is really not hard to understand. But I think we should use these tips in our own code. def main(): #To judge whether a list is empty. We can use "if list0" instead of "if len(list0)". But we mu…

<转>UITableView当数据很少的时候,去掉多余的cell分割线   在tableView初始化的时候 UIView *v = [[UIViewalloc] initWithFrame:CGRectZero]; [self.myTableViewsetTableFooterView:v]; 就可以了 cell 禁止选中   [cell setSelectionStyle:UITableViewCellSelectionStyleNone]; <转>UIActionSheet取…

文章地址  http://developer.android.com/training/articles/perf-jni.html JNI Tips JNI is the Java Native Interface. It defines a way for managed code (written in the Java programming language) to interact with native code (written in C/C++). It's vendor-ne…

matlab tips and tricks and ... page overview: I created this page as a vectorization helper but it grew to become my annotated Matlab reading cache. In order to motivate the DSP people out there, I am showing below how one can apply a window and scal…

SharePoint Tips about Permissions: What you need to know         I have been writing tips about SharePoint from last two years now. After a great popularity and huge following of my SharePoint tips section, recently I received a very interesting requ…

本文由CocoaChina译者yake_099(博客)翻译,作者:David McGraw原文:10 Actionable Performance Tips To Speed Up Your Table View 在我们开始之前,我准备从今年开始多听取一个意见.请花一些时间通过这篇简短的调查给我们一些反馈.这将会帮助我来帮助你. 如果你曾经跟collectionview打过交道,你可能已经意识到了这篇文章的价值.如果你没有注意速度这将会是一个大问题,你的用户会让你了解的.当你的scrollvie…

A NullPointerException in Java application is best way to solve it and that is also key to write robust programs which can work smoothly. As it said “prevention is better than cure”, same is true with nasty NullPointerException. Thankfully by applyin…