内容简介:Python is a popular language for Data Science. With it’s easy to learn (and read) syntax it makes getting up and running with the language much more accessible for newbies. However, without getting into the details, Python is anWhen we perform Deep Learnin
PyTrix#1: Speeding up our Python Code
May 7 ·4min read
Python is a popular language for Data Science. With it’s easy to learn (and read) syntax it makes getting up and running with the language much more accessible for newbies. However, without getting into the details, Python is an interpreted language which means it runs much slower than a compiled language , like C.
When we perform Deep Learning it’s likely we are using large amounts of data because that is when Deep Learning thrives.
Why am I saying all of this? Great question!
If we have large amounts of data and slow python code, we are more than likely going to end up with a model that runs at snails pace because our code is not computationally optimal... What was man’s solution to this great disaster? Vectorization! B-)
What is Vectorization?
To put it in layman’s terms, It speeds up Python code without the need for looping, indexing, etc., and in Data Science we use Numpy to do this — Numpy is the de facto framework for scientific programming. Technically, we still perform these operations when we implement the vectorized form in Numpy, but just not in Python — under the hood. Instead, the operations are done in optimised, pre-compiled C code — see the Documentation for more information on this.
“This practice of replacing explicit loops with array expressions is commonly referred to as vectorisation. In general, vectorized array operations will often be one or two (or more) orders of magnitude faster than their pure python equivalents, with the biggest impact seen in any kind of numerical computations” — McKinney, 2012, p. 97
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Java Web服务:构建与运行
Martin Kalin / 任增刚 / 电子工业出版社 / 2009年11月 / 45.00元
本书以示例驱动的方式详尽地介绍了XML Web服务(JAX-WS)和RESTful Web服务(JAX-RS)二者所涵盖的Java相关API。 《Java Web服务:构建和运行》这本书以清晰、务实的方法讲述Web服务相关技术,提供了混合性的架构总结、完全可以运行的代码示例,以及编译、部署和执行应用程序的一些短小精悍的指令。学习本书,读者将掌握如何从零开始编写Web服务或将已有的服务整合到现......一起来看看 《Java Web服务:构建与运行》 这本书的介绍吧!