Rinruby: Accessing the R Interpreter from Pure Ruby
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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. -
(Pdf) of from Push/Enter to Eval/Apply by Program Transformation
From Push/Enter to Eval/Apply by Program Transformation MaciejPir´og JeremyGibbons Department of Computer Science University of Oxford [email protected] [email protected] Push/enter and eval/apply are two calling conventions used in implementations of functional lan- guages. In this paper, we explore the following observation: when considering functions with mul- tiple arguments, the stack under the push/enter and eval/apply conventions behaves similarly to two particular implementations of the list datatype: the regular cons-list and a form of lists with lazy concatenation respectively. Along the lines of Danvy et al.’s functional correspondence between def- initional interpreters and abstract machines, we use this observation to transform an abstract machine that implements push/enter into an abstract machine that implements eval/apply. We show that our method is flexible enough to transform the push/enter Spineless Tagless G-machine (which is the semantic core of the GHC Haskell compiler) into its eval/apply variant. 1 Introduction There are two standard calling conventions used to efficiently compile curried multi-argument functions in higher-order languages: push/enter (PE) and eval/apply (EA). With the PE convention, the caller pushes the arguments on the stack, and jumps to the function body. It is the responsibility of the function to find its arguments, when they are needed, on the stack. With the EA convention, the caller first evaluates the function to a normal form, from which it can read the number and kinds of arguments the function expects, and then it calls the function body with the right arguments. -
Stepping Ocaml
Stepping OCaml TsukinoFurukawa YouyouCong KenichiAsai Ochanomizu University Tokyo, Japan {furukawa.tsukino, so.yuyu, asai}@is.ocha.ac.jp Steppers, which display all the reduction steps of a given program, are a novice-friendly tool for un- derstanding program behavior. Unfortunately, steppers are not as popular as they ought to be; indeed, the tool is only available in the pedagogical languages of the DrRacket programming environment. We present a stepper for a practical fragment of OCaml. Similarly to the DrRacket stepper, we keep track of evaluation contexts in order to reconstruct the whole program at each reduction step. The difference is that we support effectful constructs, such as exception handling and printing primitives, allowing the stepper to assist a wider range of users. In this paper, we describe the implementationof the stepper, share the feedback from our students, and show an attempt at assessing the educational impact of our stepper. 1 Introduction Programmers spend a considerable amount of time and effort on debugging. In particular, novice pro- grammers may find this process extremely painful, since existing debuggers are usually not friendly enough to beginners. To use a debugger, we have to first learn what kinds of commands are available, and figure out which would be useful for the current purpose. It would be even harder to use the com- mand in a meaningful manner: for instance, to spot the source of an unexpected behavior, we must be able to find the right places to insert breakpoints, which requires some programming experience. Then, is there any debugging tool that is accessible to first-day programmers? In our view, the algebraic stepper [1] of DrRacket, a pedagogical programming environment for the Racket language, serves as such a tool. -
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. -
A Practical Introduction to Python Programming
A Practical Introduction to Python Programming Brian Heinold Department of Mathematics and Computer Science Mount St. Mary’s University ii ©2012 Brian Heinold Licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported Li- cense Contents I Basics1 1 Getting Started 3 1.1 Installing Python..............................................3 1.2 IDLE......................................................3 1.3 A first program...............................................4 1.4 Typing things in...............................................5 1.5 Getting input.................................................6 1.6 Printing....................................................6 1.7 Variables...................................................7 1.8 Exercises...................................................9 2 For loops 11 2.1 Examples................................................... 11 2.2 The loop variable.............................................. 13 2.3 The range function............................................ 13 2.4 A Trickier Example............................................. 14 2.5 Exercises................................................... 15 3 Numbers 19 3.1 Integers and Decimal Numbers.................................... 19 3.2 Math Operators............................................... 19 3.3 Order of operations............................................ 21 3.4 Random numbers............................................. 21 3.5 Math functions............................................... 21 3.6 Getting -
Making a Faster Curry with Extensional Types
Making a Faster Curry with Extensional Types Paul Downen Simon Peyton Jones Zachary Sullivan Microsoft Research Zena M. Ariola Cambridge, UK University of Oregon [email protected] Eugene, Oregon, USA [email protected] [email protected] [email protected] Abstract 1 Introduction Curried functions apparently take one argument at a time, Consider these two function definitions: which is slow. So optimizing compilers for higher-order lan- guages invariably have some mechanism for working around f1 = λx: let z = h x x in λy:e y z currying by passing several arguments at once, as many as f = λx:λy: let z = h x x in e y z the function can handle, which is known as its arity. But 2 such mechanisms are often ad-hoc, and do not work at all in higher-order functions. We show how extensional, call- It is highly desirable for an optimizing compiler to η ex- by-name functions have the correct behavior for directly pand f1 into f2. The function f1 takes only a single argu- expressing the arity of curried functions. And these exten- ment before returning a heap-allocated function closure; sional functions can stand side-by-side with functions native then that closure must subsequently be called by passing the to practical programming languages, which do not use call- second argument. In contrast, f2 can take both arguments by-name evaluation. Integrating call-by-name with other at once, without constructing an intermediate closure, and evaluation strategies in the same intermediate language ex- this can make a huge difference to run-time performance in presses the arity of a function in its type and gives a princi- practice [Marlow and Peyton Jones 2004]. -
Product End User License Agreement
END USER LICENSE AGREEMENT If you have another valid, signed agreement with Licensor or a Licensor authorized reseller which applies to the specific Licensor Software, Software Services, Maintenance or Consulting Services you are downloading, accessing or otherwise receiving, that other agreement shall control; otherwise by using, downloading, installing, copying, or accessing Licensor Software, Software Services, Maintenance or Consulting Services, or by clicking on "I accept" on or adjacent to the screen where these Master Terms may be displayed, you hereby agree to be bound by and accept these Master Terms. These Master Terms shall also apply to any Maintenance or Consulting Services you later acquire from Licensor relating to the Software or Software Services. You may place orders under these Master Terms by submitting separate Order Form(s). Capitalized terms used in these Master Terms and not otherwise defined, are defined at https://terms.tibco.com/posts/845635-definitions. 1. License Models, License Grant, Rights and Restrictions. Licensor provides Software on a Perpetual, or Term basis, embedded and delivered as part of Equipment, as Software Services and on a Subscription basis. The Supplemental Terms, include, but are not limited to, the license grant, rights and restrictions for each of the foregoing (including for evaluation purposes) which are located at https://terms.tibco.com. The availability of Software in one or more of the foregoing license models is at Licensor's sole discretion. Additional license requirements and notices, if any, if not included at https://terms.tibco.com, shall be contained in the Documentation that is delivered with the applicable Software. -
Rails 4 En Windows Y Linux Ubuntu – V 1.0.5 Beta – Pag 1/200 - Actualizado Al 7/10/ 2016 Sergio A
Sergio A. Alonso - Rails 4 en Windows y Linux Ubuntu – v 1.0.5 Beta – pag 1"#00 - a$tuali%ado al &"10" 201' Sergio A. Alonso - Rails 4 en Windows y Linux Ubuntu – v 1.0.5 Beta – pag #"#00 - a$tuali%ado al &"10" 201' ¡Ud podría estar leyendo una copia vieja! ()equee la versión en el en$abe%ado de las )o,as- $ontra la última en el sitio o.$ial- )tt!/""r0uw.)ero1u.$o2 3esde allí en$ontrará el vín$ulo )acia la versión 2as actual- y un listado 2uy útil de erratas- $orrec$iones- e in$luso una sec$ión donde !ostear errores y sugeren$ias. Este libro es tan gratis como una cerveza (free-as-a-beer) (uente sie2!re con la 6ltima versión dis!onible en P38. Mi ob,etivo es que lo lea la mayor cantidad posible de personas, y que éstas me retornen sus im!resiones, errores encontrados y sugerencias en general. De he$ho, ne$esito de estos re!ortes para obtener un nivel a!re$iable de $alidad, tal *ue el libro sea digno de ser llevado a una im!renta. Una ve% que el libro este listo, pretendo seguir de,5ndolo libre, publicarlo en la editorial Bubok ;i2!resión a de2anda<- y *uedar2e como mu$ho con u=s 5 de regalías por libro... al menos para ha$erle creer a mi es!osa que hago dinero con esto. Creo que si el libro lo mere$e, la gente se cansar5 de leerlo en !antalla- y querr5 tener un e,e2!lar en pa!el. -
Roles in a Networked Software Development Ecosystem: a Case Study in Github Patrick Wagstrom IBM TJ Watson Research Center Hawthorne, NY, [email protected]
University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln CSE Technical reports Computer Science and Engineering, Department of 2012 Roles in a Networked Software Development Ecosystem: A Case Study in GitHub Patrick Wagstrom IBM TJ Watson Research Center Hawthorne, NY, [email protected] Corey Jergensen University of Nebraska-Lincoln, [email protected] Anita Sarma University of Nebraska-Lincoln, [email protected] Follow this and additional works at: http://digitalcommons.unl.edu/csetechreports Wagstrom, Patrick; Jergensen, Corey; and Sarma, Anita, "Roles in a Networked Software Development Ecosystem: A Case Study in GitHub" (2012). CSE Technical reports. 149. http://digitalcommons.unl.edu/csetechreports/149 This Article is brought to you for free and open access by the Computer Science and Engineering, Department of at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in CSE Technical reports by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. Roles in a Networked Software Development Ecosystem: A Case Study in GitHub Patrick Wagstrom Corey Jergensen, Anita Sarma IBM TJ Watson Research Center Computer Science and Engineering Department 19 Skyline Dr University of Nebraska, Lincoln Hawthorne, NY, USA 10532 Lincoln, NE, USA 68588 [email protected] {cjergens,asarma}@cse.unl.edu ABSTRACT tiple languages and utilizing multiple different development Open source software development has evolved beyond single frameworks and libraries, For example, development of a web projects into complex networked ecosystems of projects that application may use the JavaScript library jQuery for the user share portions of their code, social norms, and developer commu- interaction, Ruby on Rails for the backend processing, and Rack nities. -
Advanced Tcl E D
PART II I I . A d v a n c Advanced Tcl e d T c l Part II describes advanced programming techniques that support sophisticated applications. The Tcl interfaces remain simple, so you can quickly construct pow- erful applications. Chapter 10 describes eval, which lets you create Tcl programs on the fly. There are tricks with using eval correctly, and a few rules of thumb to make your life easier. Chapter 11 describes regular expressions. This is the most powerful string processing facility in Tcl. This chapter includes a cookbook of useful regular expressions. Chapter 12 describes the library and package facility used to organize your code into reusable modules. Chapter 13 describes introspection and debugging. Introspection provides information about the state of the Tcl interpreter. Chapter 14 describes namespaces that partition the global scope for vari- ables and procedures. Namespaces help you structure large Tcl applications. Chapter 15 describes the features that support Internationalization, includ- ing Unicode, other character set encodings, and message catalogs. Chapter 16 describes event-driven I/O programming. This lets you run pro- cess pipelines in the background. It is also very useful with network socket pro- gramming, which is the topic of Chapter 17. Chapter 18 describes TclHttpd, a Web server built entirely in Tcl. You can build applications on top of TclHttpd, or integrate the server into existing appli- cations to give them a web interface. TclHttpd also supports regular Web sites. Chapter 19 describes Safe-Tcl and using multiple Tcl interpreters. You can create multiple Tcl interpreters for your application. If an interpreter is safe, then you can grant it restricted functionality. -
Extending Facter and Puppet
Pro Puppet James Turnbull Jeffrey McCune Pro Puppet Copyright © 2011 by James Turnbull and Jeffrey McCune All rights reserved. No part of this work may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage or retrieval system, without the prior written permission of the copyright owner and the publisher. ISBN 978-1-4302-3057-1 ISBN 978-1-4302-3058-8 (eBook) Trademarked names, logos, and images may appear in this book. Rather than use a trademark symbol with every occurrence of a trademarked name, logo, or image we use the names, logos, and images only in an editorial fashion and to the benefit of the trademark owner, with no intention of infringement of the trademark. The use in this publication of trade names, trademarks, service marks, and similar terms, even if they are not identified as such, is not to be taken as an expression of opinion as to whether or not they are subject to proprietary rights. President and Publisher: Paul Manning Lead Editor: Frank Pohlmann Technical Reviewer: Jessica Fraser Editorial Board: Steve Anglin, Mark Beckner, Ewan Buckingham, Gary Cornell, Jonathan Gennick, Jonathan Hassell, Michelle Lowman, Matthew Moodie, Jeff Olson, Jeffrey Pepper, Frank Pohlmann, Douglas Pundick, Ben Renow-Clarke, Dominic Shakeshaft, Matt Wade, Tom Welsh Coordinating Editor: Anita Castro Copy Editor: Seth Kline Compositor: Bytheway Publishing Services Indexer: John Collin Artist: April Milne Cover Designer: Anna Ishchenko Distributed to the book trade worldwide by Springer Science+Business Media, LLC., 233 Spring Street, 6th Floor, New York, NY 10013. -
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 .