目grep入門があまりにもKernelVM::入門だという指摘があったため、解説をつけてよりstd::入門に近づけてみました。Read less
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This document summarizes Yurie Yamane's presentation on using mruby to make robots. It discusses using mruby and TOPPERS on the LEGO EV3 to create an inverted pendulum self-balancing robot. It then covers creating a DIY self-balancing robot using a Raspberry Pi, gyro sensor, DC motors, and a motor driver. Code examples are provided for reading sensor values, controlling motors with PWM, and implem
This document discusses Rhebok, a high performance Rack handler written in Ruby. Rhebok uses a prefork architecture for concurrency and achieves 1.5-2x better performance than Unicorn. It implements efficient network I/O using techniques like IO timeouts, TCP_NODELAY, and writev(). Rhebok also uses the ultra-fast PicoHTTPParser for HTTP request parsing. The document provides an overview of Rhebok,
Graal is a dynamic meta-circular research compiler for Java that is designed for extensibility and modularity. One of its main distinguishing elements is the handling of optimistic assumptions obtained via profiling feedback and the representation of deoptimization guards in the compiled code. Truffle is a self-optimizing runtime system on top of Graal that uses partial evaluation to derive compil
This document summarizes a microservices meetup hosted by @mosa_siru. Key points include: 1. @mosa_siru is an engineer at DeNA and CTO of Gunosy. 2. The meetup covered Gunosy's architecture with over 45 GitHub repositories, 30 stacks, 10 Go APIs, and 10 Python batch processes using AWS services like Kinesis, Lambda, SQS and API Gateway. 3. Challenges discussed were managing 30 microservices, ensur
AWSモバイル/IoTサービス徹底攻略!! Developers.IO Meetup 番外編 Advanced Track #1 http://classmethod.connpass.com/event/22060/Read less
シリコンバレーのスタートアップを数多く取材する中で気付いた「シリコンバレーにおけるディシプリン(規律)の存在」や「General Electric(GE)やIBM、SAPといった老舗企業が必死になってシリコンバレーのスタートアップを真似している理由」、そして「日本企業がイノベーションを実現するための処方箋」について解説します 詳しく知りたい場合は「GE 巨人の復活」をご覧下さい。 http://www.nikkeibp.co.jp/atclpubmkt/book/17/P55110/ 今後の記事は「シリコンバレーNext」をご覧下さい。 http://itpro.nikkeibp.co.jp/siliconvalley/
The document discusses mobile game monetization and metrics like ARPPU (Average Revenue Per Paying User). It analyzes the performance of two games, TwinkleBar and CoordeMania. TwinkleBar had 15,000 DAU (Daily Active Users), 200 payers, and $100,000 in revenue. CoordeMania had 30,000 DAU, 600 payers, and $300,000 in revenue. The document suggests that increasing DAU through improved retention and m
The document summarizes aspects of developing and maintaining the Ruby programming language, including its core team members, development resources, issue tracking process, testing procedures, release management, and security practices. The Ruby core team consists of around 90 committers and branch maintainers who work on various parts of the codebase. Development resources include build servers,
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