akiraaptx-blog

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Experienced optimizing developers don’t rely exclusively on dizzying intuitive leaps to find opportunities to improve code performance. There are patterns that recur in optimized code.

Experienced optimizing developers don’t rely exclusively on dizzying intuitive leaps to find opportunities to improve code performance. There are patterns that recur in optimized code.

This section gathers together a few general techniques for improving performance that are so useful that they deserve specific mention. The reader may recognize some of these patterns as the core of familiar data structures, C++ language features, or hardware innovations: Precomputation — Remove computation from the hot part of the program by performing it before execution arrives at the hot code…

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Apache Thrift architecture

Apache Thrift architecture This chapter covers * Introducing the Apache Thrift cross-language service architecture * Explaining how end point transports support device independence * Adding generic I/O features to Apache Thrift using layered transports * Understanding Apache Thrift serialization protocols and their features * Using the Apache Thrift IDL and the IDL Compiler * Understanding the…

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Microservice Patterns - Escaping Monolithic Hell

Microservice Patterns – Escaping Monolithic Hell

Escaping monolithic hell Scale cube and micro-services The model defines three ways to scale an application: X, Y, and Z.  X-axis scaling X-axis scaling is a commonly to scale an application. You simple run multiple instances of the application behind a load balancer. The load balancer distributes requests amongst the N identical instances of the application. Z-axis scaling Y-axis scaling…

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Creational Patterns

Creational design patterns abstract the instantiation process. They help make a system independent of how its objects are created, composed, and represented. A class creational pattern uses inheritance to vary the class that’s instantiated, whereas an object creational pattern will delegate instantiation to another object. Creational patterns become important as systems evolve to depend more on…

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A case study: Designing a Document Editor

A case study: Designing a Document Editor

This chapter presents a case study in the design of a “What-You-See-Is-What-You-Get” (or “WYSIWYG”) document editor called Lexi.[1] We’ll see how design patterns capture solutions to design problems in Lexi and applications like it. By the end of this chapter you will have gained experience with eight patterns, learning them by example. Design Problems Document structure. The choice of internal…

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Sequence Modeling: Recurrent and Recursive Nets

Sequence Modeling: Recurrent and Recursive Nets

Some examples of important design patterns for recurrent neural networks include the following: Recurrent networks that produce an output at each time step and have recurrent connections between hidden units, illustrated in Fig. 10.3. Recurrent networks that produce an output at each time step and have recurrent connections only from the output at one time step to the hidden units at the next…

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WildML – Artificial Intelligence, Deep Learning, and NLP

WildML – Artificial Intelligence, Deep Learning, and NLP

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Autonomous Driving: Modeling and Learning Behaviors

Autonomous Driving: Modeling and Learning Behaviors

Motion planning for dynamic environments is clearly one of the main problems that needs to be solved for effective autonomous navigation. As shown by Ref and Sharir, the general problem is NP-Hard, which explains the continued efforts to find algorithms to cope with that complexity. A much more overlooked but equally critical aspect of the problem is motion prediction. Motion planning algorithms…

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Autonomous Driving: Modeling and Learning Behaviors

Autonomous Driving: Modeling and Learning Behaviors

Modeling and Learning Behaviors This section describes the basic concepts involved in current motion learning and prediction approaches. After introducing the Bayes filter, it discusses Growing Hidden Markov Models, an approach which is able to perform lifelong learning, continuously updating the knowledge as more data are available. In experimental evaluation against two other state-of-the-art…

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Mastering CMake -- Key Concepts

Mastering CMake — Key Concepts

Key Concepts Main Structures This chapter provides an introduction not CMake's key concepts. As you start working with CMake, you. Will run into a variety of concepts such as targets, generators, and commands. In CMake, these concepts are implemented as C++ classes and are referenced in many of CMake's commands. Understanding these concepts will provide you with the working knowledge you need to…

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Autonomous Driving: Context and the State-of-the-Art

In this section the state-of-the-art in Intelligent Vehicles will be presented from a vehicle navigation perspective as these achieve autonomous navigation capabilities. The section is structured as follows: _Motivation_: The motivation to this ongoing transformation of modern vehicles are presented in terms of usage, safety and external factors such as fossil-fuel constraints, pollution. Vehicle…

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Effective Python (26) — Use multiple inheritance only for mix-in utility classes

Effective Python (26) — Use multiple inheritance only for mix-in utility classes

Python is an object-oriented language with built-in facilities for making multiple inheritance tractable. However, it's better to avoid multiple inheritance altogether. If you find you yourself desiring the convenience and encapsulation that comes with multiple inheritance, considering writing a mix-in instead. A mix-in is a small class that only defines a set of additional methods that a class…

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The Origin of Best Practices

The Origin of Best Practices

Hacking According to Richard Stallman, hackers have love of excellence and programming in common. The enjoy the creative challenging to overcome technical limitations and achieve things not thought possible before. People who are good at hacking are indispensable in todays technology-driven society. Hacking is a key skill, and we need people who are good at it. Without doubt, hacking is a useful…

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Introduction to Algorithms -- Red-Black Tree

Introduction to Algorithms — Red-Black Tree

1. Properties of red-black trees A red-black tree is a binary search tree with one extra bit of storage per node: its color, which can either RED or BLACK. By constraining the node colors on any simple path from the root to a leaf, red-black trees ensure that no such path is more than twice as long as any other, so that the tree is approximately balanced. Each node of the tree now contains the…

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Introduction-to-algorithms -- dynamic programmimng

Introduction-to-algorithms — dynamic programmimng

Dynamic programming typically applies to optimization problems in which we make a set of choices in order to arrive at an optimal solution. As we make each choice, subproblems of the same form often arise. Dynamic programming is effective when a given subproblem may arise form more than one partial set of choices. The key technique is to store the solution to each such subproblem in case it…

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Performance of Python Data Structures

Performance of Python Data Structures

It is important for you to understand the efficiency of these Python data structures because they are the building blocks we will use as we implement other data structure in the remainder of the book. Lists The designers of Python had many choices to make when they implemented the list data structure. Each of these choices could have an impact of how fast on how fast list operations perform. To…

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Mathematics for 3D Game Programming and Computer Graphics – Vectors

Mathematics for 3D Game Programming and Computer Graphics – Vectors

Vectors are of fundamental importance in any 3D game engine. They are used to represent points in space, such as the locations of objects in a game or the vertices of a triangle mesh. They are also used to represent spatial directions, such as the orientation of the camera or the surface normals of a triangle mesh. Understanding how to manipulate vectors is an essential skill of the successful 3D…