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Are Exceptions in C++ really slow
... handler)
So, mostly cache misses, and thus not trivial compared to pure CPU code.
Note: for more details, read the TR18015 report, chapter 5.4 Exception Handling (pdf)
So, yes, exceptions are slow on the exceptional path, but they are otherwise quicker than explicit checks (if strategy) in gene...
How do you parse and process HTML/XML in PHP?
...k.
Again, I would not recommend this parser. It is rather slow with high CPU usage. There is also no function to clear memory of created DOM objects. These problems scale particularly with nested loops. The documentation itself is inaccurate and misspelled, with no responses to fixes since 14 Apr ...
What's the difference between an inverted index and a plain old index?
...or documents set) as fast as possible. Think about the limit of memory and cpu, other index can't finish this job.
You can read lucene document for more details. It's a open source search engine. http://lucene.apache.org/java/docs/index.html
...
When to use Tornado, when to use Twisted / Cyclone / GEvent / other [closed]
... the word "concurrency" to mean "concurrent parallel execution on multiple CPUs". Twisted can do concurrent I/O scheduling via asynchronous (callback-based) I/O. GEvent can do concurrent I/O scheduling via a micro-thread scheduler. In Twisted, using spawnProcess, this I/O scheduling can be transla...
Algorithm for creating a school timetable
...e same time produced about the same quality.
The calculation (on some 1GHz CPU) would take some 1h to stabilize near 10^+300, generating schedules that looked quite nice, for said 10x10x10 test case.
The problem is easily paralellizable by providing networking facility that would exchange best speci...
How to design a multi-user ajax web application to be concurrently safe
...he connection will be necessary, as well as limiting the amount continuous CPU and I/O work done in each of these (you want lots of sleep/idle time)
backend scaling
Forget database and filesystem, you will need some sort of shared memory based backend for the frequent polling (if the client does...
Should I use Vagrant or Docker for creating an isolated environment? [closed]
...nstead of LXC based. However, I've found a decent laptop (8 GB RAM, i5/i7 CPU) has no trouble running a VM using Vagrant/VirtualBox alongside development tooling.
One of the really great things with Vagrant is the integration with Puppet/Chef/shell scripts for automating configuration. If you're u...
C#对象序列化与反序列化 - 更多技术 - 清泛网 - 专注IT技能提升
...的)。
2. 在JavaScritp中使用XML比较麻烦(还有浏览器的兼容问题),反而各种浏览器对JSON有非常好的支持。
(14)反序列化的使用总结
如果XML是由类型序列化得到那的，那么反序列化的调用代码是很简单的，反之，如果要面对一个没...
C#对象序列化与反序列化 - 更多技术 - 清泛网 - 专注IT技能提升
...的)。
2. 在JavaScritp中使用XML比较麻烦(还有浏览器的兼容问题),反而各种浏览器对JSON有非常好的支持。
(14)反序列化的使用总结
如果XML是由类型序列化得到那的，那么反序列化的调用代码是很简单的，反之，如果要面对一个没...
C#对象序列化与反序列化 - 更多技术 - 清泛网 - 专注IT技能提升
...的)。
2. 在JavaScritp中使用XML比较麻烦(还有浏览器的兼容问题),反而各种浏览器对JSON有非常好的支持。
(14)反序列化的使用总结
如果XML是由类型序列化得到那的，那么反序列化的调用代码是很简单的，反之，如果要面对一个没...