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Why does my application spend 24% of its life doing a null check?
...eading from sequential addresses. The unit of storage for the L1 cache is 64 bytes. Or in other words, once the processor reads one byte, the next 63 are very fast since they'll be present in the cache.
Which makes an array by far the most efficient data structure. Also the reason that the .NET Lis...
Making 'git log' ignore changes for certain paths
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It is implemented now (git 1.9/2.0, Q1 2014) with the introduction pathspec magic :(exclude) and its short form :! in commit ef79b1f and commit 1649612, by
Nguyễn Thái Ngọc Duy (pclouds), documentation can be found here.
You now can log everything except a sub-f...
How Python web frameworks, WSGI and CGI fit together
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How WSG...
In Firebase, is there a way to get the number of children of a node without loading all the node dat
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Why is TypedReference behind the scenes? It's so fast and safe… almost magical!
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Short answer: portability.
While __arglist, __makeref, and __refvalue are language extensions a...
How to correctly use “section” tag in HTML5?
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answered Aug 24 '11 at 22:42
Wesley MurchWesley Murch
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What does “abstract over” mean?
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In algebra, as in everyday concept formation, abstractions are formed by grouping things by some...
Inheriting class methods from modules / mixins in Ruby
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海量数据相似度计算之simhash和海明距离 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
... out .println(" 耗费时间： " + (t2 - t1) + " ms ");
耗费时间： 4266 ms
大跌眼镜，居然计算耗费4秒。假设我们一天需要比较100w次，光是比较100w次的数据是否重复就需要4s，就算4s一个文档，单线程一分钟才处理15个文档，一个小时才900...