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TCP 的那些事儿（下） - 更多技术 - 清泛网 - 专注C/C++及内核技术
... 算法
但是上面的这个算法在重传的时候会出有一个终极问题——你是用第一次发数据的时间和ack回来的时间做RTT样本值，还是用重传的时间和ACK回来的时间做RTT样本值？
这个问题无论你选那头都是按下葫芦起了瓢。 如下图所...
Processing Symbol Files in Xcode
...licate crash reports that happened on that iOS version.
Since symbols are CPU specific, the above only works if you have imported the symbols not only for a specific iOS device but also for a specific CPU type. The currently CPU types needed are armv7 (e.g. iPhone 4, iPhone 4s), armv7s (e.g. iPhone...
How efficient can Meteor be while sharing a huge collection among many clients?
...onnection to its
client and updates its server-side in-memory copy.
Total CPU cost is the cost to diff one Mongo query, plus the cost of
1,000 merge boxes checking their clients' state and constructing a new
DDP message payload. The only data that flows over the wire is a single
JSON object sent t...
How does a debugger work?
...ddress 0x7710cafe. As the instruction pointer changes the OS (or maybe the CPU) will have to compare the instruction pointer with all break point addresses, or am I mistaken? How does this work ..?
– displayname
Jan 23 '14 at 17:09
...
What is the purpose of a stack? Why do we need it?
...It has very good locality of reference, a very important feature on modern CPUs that chew through data a lot faster than RAM can supply it and supports recursion. Language design is heavily influenced by having a stack, visible in support for local variables and scope limited to the method body. A...
Linux的诞生和发展 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...的时候已经想到要实现与POSIX（UNIX 的国际标准）的兼容问题了。
Linux 操作系统的诞生
1981 年IBM 公司推出享誉全球的微型计算机IBM PC。在1981-1991 年间，MS-DOS 操作系统一直是微型计算机上操作系统的主宰。此时计算机...
代码块超过1.2w编译apk报错问题 - App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
...不好恢复老版本不验证了）
--------
怀疑 kawa Scheme 生成问题，更新新版本试试。（也不容易更新）
https://community.appinventor.mi ... or-d8-failed/141334
Speed comparison with Project Euler: C vs Python vs Erlang vs Haskell
...me ./euler12-c
842161320
./euler12-c 11.95s
user 0.00s
system 99%
cpu 11.959 total
PyPy 1.5
% time pypy euler12.py
842161320
pypy euler12.py
16.44s user
0.01s system
99% cpu 16.449 total
RPython (using latest PyPy revision, c2f583445aee)
% time ./euler12-rpython-c
842161320
./eule...
技术人员如何创业《一》—— 产品及想法 - 资讯 - 清泛网 - 专注C/C++及内核技术
...品及想法：
什么是好的产品？一个朋友之前问到，这个问题要系统的回答还真有点不好说。看一下比较理论的解释，产品指一个能够满足用户的需求，我们能够使用可行的技术手段实现并且通过销售给用户给公司带来利润。好...
C++静态和多态，亦敌亦友 - C/C++ - 清泛网 - 专注C/C++及内核技术
...平共存，时而协同工作。
老规矩，还是一小段代码提出问题，当一个虚成员函数（多态性）在其子类中被声明为静态成员函数时（或相反过来），会发生什么？
1、当虚函数遭遇静态函数
#include <iostream>
using namespace std;
cla...