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Why aren't variable-length arrays part of the C++ standard?
...loca(), I didn't really care that the memory was physically located on the cpu stack, just that it came from some stack allocator that didn't incur slow trips to the general heap. So I have a per-thread object that owns some memory from which it can push/pop variable sized buffers. On some platfor...
从估值5千万到一无所有 90后的他感觉梦境一场 - 资讯 - 清泛网 - 专注C/C++...
...O2O现在还没到风口。宠物行业的根本不在这里，这是源头问题。”与此同时，他对爱狗团的方向也进行了调整。夏军原本做的是宠物O2O，类似于美团的团购模式，将买家导入到线下的商户。而他放弃了O2O做法，现在做的模式不像...
What does a just-in-time (JIT) compiler do?
...ime, as it's called) into a form that's usually faster, typically the host CPU's native instruction set. A JIT has access to dynamic runtime information whereas a standard compiler doesn't and can make better optimizations like inlining functions that are used frequently.
This is in contrast to a t...
Web API 最佳入门指南 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...时服务，例如股票，聊天室，在线游戏等实时性要求比较高的服务。
为什么要用 Web API
Web API最重要的是可以构建面向各种客户端的服务。另外与WCF REST Service不同在于，Web API利用Http协议的各个方面来表达服务(例如 URI/request r...
你真的了解熊市有多么可怕吗？ - 创意 - 清泛网 - 专注C/C++及内核技术
...巫见大巫了。大盘反弹在1700点后，横了一个月，一个冲高的假突破后，大盘再次杀跌，当时没有人再敢抄底了，因为谁也不敢想底在哪里，十几天下来，大盘已经到了1300，后来大盘出现了又一次的反弹，最后进入了最恐怖的阴...
Fatal error: Maximum execution time of 30 seconds exceeded
...
php.ini can be found in /etc/php5/apache2/php.ini.... I'm using ubuntu 13.04...
– Enissay
Sep 4 '13 at 14:18
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What and When to use Tuple? [duplicate]
...y become unreadable because the properties are called Item1, Item2, Item3, etc..
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When is assembly faster than C?
...al minutes to complete, mainly because he was using multiplies and divides etc.
I showed him how to recast the problem using bit shifts, and the time to process came down to about 30 seconds on the non-optimizing compiler he had.
I had just got an optimizing compiler and the same code rotated the ...
Where do you store your salt strings?
...lted-hash of the password. The application is aware of this design so can fetch this data, and obtain the salt and salted-password hash.
My rationale for this approach:
If the password/hash data is compromised and falls into the hands of an attacker, the attacker will not know what the salt is fro...
Command to get time in milliseconds
...ime.
$ time date +%s%N
1597103627N
date +%s%N 0.00s user 0.00s system 63% cpu 0.006 total
Python is still improving it's VM start time, and it is not as fast as ahead-of-time compiled code (such as date).
On my machine, it took about 30ms - 60ms (that is 5x-10x of 6ms taken by date)
$ time python ...