Debugging at Full Speed
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Tomasz Dąbrowski / Rockhard GIC 2016 Poznań WHAT DO WE WANT? WHAT DO WE WANT?
WHY (M)RUBY SHOULD BE YOUR NEXT SCRIPTING LANGUAGE? Tomasz Dąbrowski / Rockhard GIC 2016 Poznań WHAT DO WE WANT? WHAT DO WE WANT? • fast iteration times • easy modelling of complex gameplay logic & UI • not reinventing the wheel • mature tools • easy to integrate WHAT DO WE HAVE? MY PREVIOUS SETUP • Lua • not very popular outside gamedev (used to be general scripting language, but now most applications seem to use python instead) • even after many years I haven’t gotten used to its weird syntax (counting from one, global variables by default, etc) • no common standard - everybody uses Lua differently • standard library doesn’t include many common functions (ie. string.split) WHAT DO WE HAVE? • as of 2016, Lua is still a gold standard of general game scripting languages • C# (though not scripting) is probably even more popular because of the Unity • Unreal uses proprietary methods of scripting (UScript, Blueprints) • Squirrel is also quite popular (though nowhere near Lua) • AngelScript, Javascript (V8), Python… are possible yet very unpopular choices • and you can always just use C++ MY CRITERIA POPULARITY • popularity is not everything • but using a popular language has many advantages • most problems you will encounter have already been solved (many times) • more production-grade tools • more documentation, tutorials, books, etc • most problems you will encounter have already been solved (many times) • this literally means, that you will be able to have first prototype of anything in seconds by just copying and pasting code • (you can -
Rubyperf.Pdf
Ruby Performance. Tips, Tricks & Hacks Who am I? • Ezra Zygmuntowicz (zig-mun-tuv-itch) • Rubyist for 4 years • Engine Yard Founder and Architect • Blog: http://brainspl.at Ruby is Slow Ruby is Slow?!? Well, yes and no. The Ruby Performance Dichotomy Framework Code VS Application Code Benchmarking: The only way to really know performance characteristics Profiling: Measure don’t guess. ruby-prof What is all this good for in real life? Merb Merb Like most useful code it started as a hack, Merb == Mongrel + Erb • No cgi.rb !! • Clean room implementation of ActionPack • Thread Safe with configurable Mutex Locks • Rails compatible REST routing • No Magic( well less anyway ;) • Did I mention no cgi.rb? • Fast! On average 2-4 times faster than rails Design Goals • Small core framework for the VC in MVC • ORM agnostic, use ActiveRecord, Sequel, DataMapper or roll your own db access. • Prefer simple code over magic code • Keep the stack traces short( I’m looking at you alias_method_chain) • Thread safe, reentrant code Merb Hello World No code is faster then no code • Simplicity and clarity trumps magic every time. • When in doubt leave it out. • Core framework to stay small and simple and easy to extend without gross hacks • Prefer plugins for non core functionality • Plugins can be gems Key Differences • No auto-render. The return value of your controller actions is what gets returned to client • Merb’s render method just returns a string, allowing for multiple renders and more flexibility • PartController’s allow for encapsualted applets without big performance cost Why not work on Rails instead of making a new framework? • Originally I was trying to optimize Rails and make it more thread safe. -
Feather-Weight Cloud OS Developed Within 14 Man-Days Who Am I ?
Mocloudos Feather-weight Cloud OS developed within 14 man-days Who am I ? • Embedded Software Engineer • OSS developer • Working at Monami-ya LLC. • Founder/CEO/CTO/CFO/and some more. Some My Works • Realtime OS • TOPPERS/FI4 (dev lead) • TOPPERS/HRP (dev member) • OSS (C) JAXA (C) TOPPERS Project • GDB (committer / write after approval) • mruby (listed in AUTHOR file) • Android-x86 (develop member) Wish • Feather-weight cloud OS. • Runs on virtualization framework. • Works with VM based Light-weight Language like Ruby. Wish • Construct my Cloud OS within 14 man-days My First Choice • mruby - http://www.mruby.org/ • Xen + Stubdom - http://www.xen.org/ What’s mruby • New Ruby runtime. http://github.com/mruby/mruby/ • Created by Matz. GitHub based CI development. • Embedded systems oriented. • Small memory footprint. • High portability. (Device independent. ISO C99 style.) • Multiple VM state support (like Lua). • mrbgem - component model. mrbgem • Simple component system for mruby. • Adds/modifies your feature to mruby core. • By writing C lang source or Ruby script. • Linked statically to core runtime. • Easy to validate whole runtime statically. Stubdom • “Stub” for Xen instances in DomU. • IPv4 network support (with LWIP stack) • Block devices support. • Newlib based POSIX emulation (partly) • Device-File abstraction like VFS. Stubdom • This is just a stub. • The implementation is half baked. • More system calls returns just -1 (error) • No filesystems My Additional Choice • FatFs : Free-beer FAT Filesystem • http://elm-chan.org/fsw/ff/00index_e.html • Very permissive license. • So many example uses including commercial products. My Hacks • Writing several glue code as mrbgems. • Xen’s block device - FatFs - Stubdom • Hacking mrbgems to fit poor Stubdom API set. -
Insert Here Your Thesis' Task
Insert here your thesis' task. Czech Technical University in Prague Faculty of Information Technology Department of Software Engineering Master's thesis New Ruby parser and AST for SmallRuby Bc. Jiˇr´ıFajman Supervisor: Ing. Marcel Hlopko 18th February 2016 Acknowledgements I would like to thank to my supervisor Ing. Marcel Hlopko for perfect coop- eration and valuable advices. I would also like to thank to my family for support. Declaration I hereby declare that the presented thesis is my own work and that I have cited all sources of information in accordance with the Guideline for adhering to ethical principles when elaborating an academic final thesis. I acknowledge that my thesis is subject to the rights and obligations stip- ulated by the Act No. 121/2000 Coll., the Copyright Act, as amended. In accordance with Article 46(6) of the Act, I hereby grant a nonexclusive au- thorization (license) to utilize this thesis, including any and all computer pro- grams incorporated therein or attached thereto and all corresponding docu- mentation (hereinafter collectively referred to as the \Work"), to any and all persons that wish to utilize the Work. Such persons are entitled to use the Work in any way (including for-profit purposes) that does not detract from its value. This authorization is not limited in terms of time, location and quan- tity. However, all persons that makes use of the above license shall be obliged to grant a license at least in the same scope as defined above with respect to each and every work that is created (wholly or in part) based on the Work, by modifying the Work, by combining the Work with another work, by including the Work in a collection of works or by adapting the Work (including trans- lation), and at the same time make available the source code of such work at least in a way and scope that are comparable to the way and scope in which the source code of the Work is made available. -
Cross-Platform Mobile Software Development with React Native Pages and Ap- Pendix Pages 27 + 0
Cross-platform mobile software development with React Native Janne Warén Bachelor’s thesis Degree Programme in ICT 2016 Abstract 9.10.2016 Author Janne Warén Degree programme Business Information Technology Thesis title Number of Cross-platform mobile software development with React Native pages and ap- pendix pages 27 + 0 The purpose of this study was to give an understanding of what React Native is and how it can be used to develop a cross-platform mobile application. The study explains the idea and key features of React Native based on source literature. The key features covered are the Virtual DOM, components, JSX, props and state. I found out that React Native is easy to get started with, and that it’s well-suited for a web programmer. It makes the development process for mobile programming a lot easier com- pared to traditional native approach, it’s easy to see why it has gained popularity fast. However, React Native still a new technology under rapid development, and to fully under- stand what’s happening it would be good to have some knowledge of JavaScript and per- haps React (for the Web) before jumping into React Native. Keywords React Native, Mobile application development, React, JavaScript, API Table of contents 1 Introduction ..................................................................................................................... 1 1.1 Goals and restrictions ............................................................................................. 1 1.2 Definitions and abbreviations ................................................................................ -
Internationalization in Ruby 2.4
Internationalization in Ruby 2.4 http://www.sw.it.aoyama.ac.jp/2016/pub/IUC40-Ruby2.4/ 40th Internationalization and Unicode Conference Santa Clara, California, U.S.A., November 3, 2016 Martin J. DÜRST [email protected] Aoyama Gakuin University © 2016 Martin J. Dürst, Aoyama Gakuin University Abstract Ruby is a purely object-oriented scripting language which is easy to learn for beginners and highly appreciated by experts for its productivity and depth. This presentation discusses the progress of adding internationalization functionality to Ruby for the version 2.4 release expected towards the end of 2016. One focus of the talk will be the currently ongoing implementation of locale-aware case conversion. Since Ruby 1.9, Ruby has a pervasive if somewhat unique framework for character encoding, allowing different applications to choose different internationalization models. In practice, Ruby is most often and most conveniently used with UTF-8. Support for internationalization facilities beyond character encoding has been available via various external libraries. As a result, applications may use conflicting and confusing ways to invoke internationalization functionality. To use case conversion as an example, up to version 2.3, Ruby comes with built-in methods for upcasing and downcasing strings, but these only work on ASCII. Our implementation extends this to the whole Unicode range for version 2.4, and efficiently reuses data already available for case-sensitive matching in regular expressions. We study the interface of internationalization functions/methods in a wide range of programming languages and Ruby libraries. Based on this study, we propose to extend the current built-in Ruby methods, e.g. -
UNIVERSITY of CALIFORNIA, SAN DIEGO Toward Understanding And
UNIVERSITY OF CALIFORNIA, SAN DIEGO Toward Understanding and Dealing with Failures in Cloud-Scale Systems A dissertation submitted in partial satisfaction of the requirements for the degree of Doctor of Philosophy in Computer Science by Peng Huang Committee in charge: Professor Yuanyuan Zhou, Chair Professor Tara Javidi Professor Ranjit Jhala Professor George Porter Professor Stefan Savage 2016 Copyright Peng Huang, 2016 All rights reserved. The Dissertation of Peng Huang is approved and is acceptable in quality and form for publication on microfilm and electronically: Chair University of California, San Diego 2016 iii DEDICATION To my parents, brother and fiancée for their unconditional love and support. iv EPIGRAPH Quis custodiet ipsos custodes? (But who can watch the watchmen?) Juvenal Anything that can go wrong, will go wrong. Murphy’s law Those who fail to learn from the mistakes are doomed to repeat them. George Santayana In the middle of the night, [...] He would awaken and find himeself wondering if one of the machines had stopped working for some new, unknown reason. Or he would wake up thinking about the latest failure, the one whose cause they’d been looking for a whole week and sitll hadn’t found. The bogeyman—la machine—was there in his bedroom. Tracy Kidder, The Soul of a New Machine v TABLE OF CONTENTS SignaturePage...................................... .................. iii Dedication ......................................... .................. iv Epigraph........................................... .................. v TableofContents -
C. Elegans and CRISPR/Cas Gene Editing to Study BAP1 Cancer-Related Mutations and Cisplatin Chemoresistance
C. elegans and CRISPR/Cas gene editing to study BAP1 cancer-related mutations and cisplatin chemoresistance Carmen Martínez Fernández TESI DOCTORAL UPF / 2020 Thesis supervisor Dr. Julián Cerón Madrigal Modeling Human Diseases in C. elegans Group. Gene, Disease, and Therapy Program. IDIBELL. Department of Experimental and Health Sciences Para aquellos que aún perviven en el amor, la alegría y la perseverancia. Acknowledgments En primer lugar, quiero agradecer a mis padres, María del Mar y Fran, por darme vuestro amor y apoyo incondicional en todas las decisiones que he tomado en estos 27 años. Y a mi hermana, Helena, por tener el corazón más grande del planeta, a juego con sus labios y su frente, y tenerme siempre en él. No os lo digo, pero os quiero mucho. A mi familia, porque sois la mejor que me ha podido tocar: a mi abuelo Paco, a mi abuela Carmen y mi a abuela Maru. A vosotros, Caki y Padrino, titos y titas. A mis primos, primitas y primito =) Os quiero mucho a todos! Mención especial a Julián, ¡lo hemos conseguido!. Gracias por el apoyo. Gracias por la motivación que desprendes, aunque a veces sea difícil de encontrar. Gracias también por echarme del país y por dejarme empezar a aprender contigo. No ha sido fácil, pero sin duda, volvería a repetir. A Curro, Karinna, Xènia y Montse, porque fuisteis mis primeros labmates. Esos nunca se olvidan. A la segunda ronda, David, Dimitri, LLuís y Jeremy. ¡Lo que une Cerón lab, no lo separará nae! En especial, quería agradecer a XS, Mex y Dim. -
Anton Davydov ·
Anton Davydov Software Architect phone: +7(968) 663-81-28 email: [email protected] github: github.com/davydovanton site: davydovanton.com About Helping business solve problems, grow technical culture and developers understand business. Active OpenSource activist and contributor. Hanami and dry-rb core developer. I’m trying to be on the cutting edge of technology. Besides I have communication skills and meet deadlines. I’m interested in distributed systems, data evolution, communication between different services, architecture problems and functional programming. Profession experience JUNE 2020 - CURRENT TIME, CONSULTING, SOLUTION ARCHITECT Worked as an independent solution architect with different clients. I helped with getting business requirements and logic, detecting the importance of each business feature. Also, I designed a technical solution based on business requirements, current implementation, and available technical and non-technical resources. I helped with migration from monolith to SOA and helped with understanding and researching around necessary infrastructure for SOA. I worked on several major tasks at this time: - Got necessary requirements, designed and helped with implementation for a new version of billing for internal employees; - Got necessary requirements and designed solution for item synchronization in orders; - Designed a new implementation for roles in the company based on ABAC paradigm; Domains: Ecommerce, advertising, billing and accounting, integration with different systems, SOA. Database: postgresql, redis, big query, kafka, rabbitmq, elastic search, prometheus. Languages: ruby, javascript, node.js, go, elixir, java. JULY 2019 - MARCH 2020, TOPTAL, BACKEND ARCHITECT I developed, researched, documented and managed migration to service-oriented architecture while I was working in toptal. I researched technologies and practices which toptal are using for migrating to the service and build new architecture. -
Development of Benchmarking Suite for Various Ruby Implementations
MASARYKOVA UNIVERZITA FAKULTA}w¡¢£¤¥¦§¨ INFORMATIKY !"#$%&'()+,-./012345<yA| Development of benchmarking suite for various Ruby implementations BACHELOR THESIS Richard Ludvigh Brno, Spring 2015 Declaration Hereby I declare, that this paper is my original authorial work, which I have worked out by my own. All sources, references and literature used or excerpted during elaboration of this work are properly cited and listed in complete reference to the due source. Richard Ludvigh Advisor: RNDr. Adam Rambousek ii Acknowledgement I would like to thank my supervisor RNDr. Adam Rambousek who has supported me throughout my thesis. I would also like to thank my advisor Ing. Václav Tunka for advice and consultation regarding technical aspects of work as well as guidance and feedback through- out my thesis. Access to the CERIT-SC computing and storage facilities provided under the programme Center CERIT Scientific Cloud, part of the Op- erational Program Research and Development for Innovations, reg. no. CZ. 1.05/3.2.00/08.0144, is greatly appreciated. iii Abstract Ruby is a modern, dynamic, pure object-oriented programming lan- guage. It has multiple implementations which provide different per- formance. The aim of this bachelor thesis is to provide a container- based tool to benchmark and monitor those performance differences inside an isolated environment. iv Keywords Ruby, JRuby, Rubinius, MRI, Docker, benchmarking, performance v Contents 1 Introduction ............................3 2 State of the art ...........................4 3 Ruby performance ........................6 3.1 Introduction to Ruby ....................6 3.2 Ruby implementations ...................7 3.2.1 MRI or CRuby . .7 3.2.2 JRuby . .7 3.2.3 Rubinius . -
Optimizing Ruby on Rails for Performance and Scalability
DEGREE PROJECT IN COMPUTER SCIENCE 120 CREDITS, SECOND CYCLE STOCKHOLM, SWEDEN 2016 Optimizing Ruby on Rails for performance and scalability KIM PERSSON KTH ROYAL INSTITUTE OF TECHNOLOGY SCHOOL OF COMPUTER SCIENCE AND COMMUNICATION Optimizing Ruby on Rails for performance and scalability Optimering av Ruby on Rails för prestanda och skalbarhet KIM PERSSON [email protected] Degree project in Computer Science Master’s Programme Computer Science Supervisor: Stefano Markidis Examiner: Jens Lagergren Employer: Slagkryssaren AB February 2016 Abstract Web applications are becoming more and more popular as the bound- aries of what can be done in a browser are pushed forward. Ruby on Rails is a very popular web application framework for the Ruby pro- gramming language. Ruby on Rails allows for rapid prototyping and development of web applications but it suffers from performance prob- lems with large scale applications. This thesis focuses on optimization of a Ruby on Rails application to improve its performance. We performed three optimizations to a benchmark application that was developed for this project. First, we removed unnecessary modules from Ruby on Rails and optimized the database interaction with Active Record which is the default object re- lational mapping (ORM) in Ruby on Rails. It allows us to fetch and store models in the database without having to write database specific query code. These optimizations resulted in up to 36% decrease in ap- plication response time. Second, we implemented a caching mechanism for JavaScript Object Notation (JSON) representation of models in the optimized application. This second optimization resulted in a total of 96% response time decrease for one of the benchmarks. -
Rubinius Rubini Us Rubini.Us Rubini.Us Rubini.Us Rubinius History and Design Goals
Rubinius Rubini us Rubini.us rubini.us http:// rubini.us Rubinius http://godfat.org/slide/2008-12-21-rubinius.pdf History and Design Goals Architecture and Object Model History and Design Goals Architecture and Object Model Evan Phoenix February of 2006 RubySpec MSpec Engine Yard C VM Shotgun C VM Shotgun C++ VM CxxTest LLVM History and Design Goals Architecture and Object Model Reliable, Rock Solid Code Reliable, Rock Solid Code Full Test Coverage 健康 Clean, Readable Code Clean, Readable Code Little Lines in Each File Clean, Readable Code Macro, Code Generator, Rake Task Clean, Readable Code CMake Clean, Readable Code CMake Clean, Readable Code C++ Object to Ruby Object 1 to 1 Mapping 清新 健康 清新 Modern Techniques Modern Techniques Pluggable Garbage Collectors Modern Techniques Pluggable Garbage Collectors • Stop-and-Copy Modern Techniques Pluggable Garbage Collectors • Stop-and-Copy • Mark-and-Sweep Modern Techniques Optimizers Modern Techniques Git, Rake, LLVM Squeak the Smalltalk-80 Implementation Squeak Slang Squeak • Alan Kay • Dan Ingalls • Adele Goldberg Smalltalk Xerox PARC Smalltalk Object-Oriented (differ from Simula and C++) Smalltalk GUI Smalltalk MVC History and Design Goals Architecture and Object Model Real Machine C++ Virtual Machine Real Machine kernel/bootstrap C++ Virtual Machine Real Machine kernel/platform kernel/bootstrap C++ Virtual Machine Real Machine kernel/common kernel/platform kernel/bootstrap C++ Virtual Machine Real Machine kernel/delta kernel/common kernel/platform kernel/bootstrap C++ Virtual Machine Real