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Programming: TCMalloc, Ballerina, Perl, Scala, Python

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  • TCMalloc, Google's Customized Memory Allocator for C and C++, Now Open Source

    To clear up any ambiguity, it is worth noting this is actually the second time Google open-sources its memory allocator. Indeed, Google had already provided its memory allocator as a part of Google Performance Tools in 2005 along with many other tools, including a memory profiler, a heap checker aimed to ensure heap consistency, and Perl-based ppro profile analyzer and visualizer. As it happens, though, the internal version in use at Google diverged with time from the external one, so Google is now open sourcing its current version of TCMalloc, which contains several improvements such as per-CPU caches, sized delete, fast/slow path improvements, and more.

  • Ballerina Improves IDE

    Sequence diagrams are central to Ballerina. The developers say rather than relying on code, every program is a sequence diagram that illustrates distributed and concurrent interactions automatically.

  • Monthly Report - February

    Looking back at my last month performance, I get mixed feelings. I feel bad that I only submitted 7 Pull Requests. It is not that I didn't try to up the number. I noticed some of my past Pull Request disappearing from GitHub. It is affecting my Pull Request Stats. I keep all contributions record under my GitHub profile. It gives me sense of accomplishments.

  • Narrowly destricted refs

    I really don’t feel like I have anything to add but I suppose it may not be obvious that the point of this exercise is to surgically limit the lifting of the refs stricture to just the desired symbolic dereference (without leaking it even as far as any other part of the expression) – in the most compact form possible.

    I also suppose I ought to expand on it by way of explanation for the less travelled in the dustier corners of Perl 5 syntax:

    The only even interesting part here is the little-realised fact that the curly braces in the traditional dereference syntax actually literally denote a block – complete with its own scope – much as curly braces do in general. Or in other words: every ${ ... } (or the like) is a do { ... } block. Just one that dereferences the value of the last expression in the block before returning it, instead of returning it verbatim (like a do { ... } block would).

  • Scala 2 community build is now complete

    The Scala 2 community build has been pronounced complete. We took a closer look at the general goals of the open source community build, what the latest version has in store, and what the Scala team has planned for the future of the general-purpose programming language.

  • Tryton News: Newsletter March 2020

    Tryton is a business software platform which comes with a set of modules that can be activated to make an ERP, MRP, CRM and other useful applications for organizations of any kind.
    This month most of the changes were made in order to improve default Tryton features and allow it to work better in international use cases.

  • How to pickle objects in Python

    Any data can be serialized and deserialized in Python by using JSON and Pickle module. Before storing any data in a file, Python objects are serialized using pickle module. Python objects are converted into character streams by using this module. When the user wants to retrieve the data of the file for using another python script then the data of the file is deserialized by pickle module. The features of pickle module and how this module can be used in python script for serialization and deserialization are described in this tutorial.

More in Tux Machines

digiKam 7.7.0 is released

After three months of active maintenance and another bug triage, the digiKam team is proud to present version 7.7.0 of its open source digital photo manager. See below the list of most important features coming with this release. Read more

Dilution and Misuse of the "Linux" Brand

Samsung, Red Hat to Work on Linux Drivers for Future Tech

The metaverse is expected to uproot system design as we know it, and Samsung is one of many hardware vendors re-imagining data center infrastructure in preparation for a parallel 3D world. Samsung is working on new memory technologies that provide faster bandwidth inside hardware for data to travel between CPUs, storage and other computing resources. The company also announced it was partnering with Red Hat to ensure these technologies have Linux compatibility. Read more

today's howtos

  • How to install go1.19beta on Ubuntu 22.04 – NextGenTips

    In this tutorial, we are going to explore how to install go on Ubuntu 22.04 Golang is an open-source programming language that is easy to learn and use. It is built-in concurrency and has a robust standard library. It is reliable, builds fast, and efficient software that scales fast. Its concurrency mechanisms make it easy to write programs that get the most out of multicore and networked machines, while its novel-type systems enable flexible and modular program constructions. Go compiles quickly to machine code and has the convenience of garbage collection and the power of run-time reflection. In this guide, we are going to learn how to install golang 1.19beta on Ubuntu 22.04. Go 1.19beta1 is not yet released. There is so much work in progress with all the documentation.

  • molecule test: failed to connect to bus in systemd container - openQA bites

    Ansible Molecule is a project to help you test your ansible roles. I’m using molecule for automatically testing the ansible roles of geekoops.

  • How To Install MongoDB on AlmaLinux 9 - idroot

    In this tutorial, we will show you how to install MongoDB on AlmaLinux 9. For those of you who didn’t know, MongoDB is a high-performance, highly scalable document-oriented NoSQL database. Unlike in SQL databases where data is stored in rows and columns inside tables, in MongoDB, data is structured in JSON-like format inside records which are referred to as documents. The open-source attribute of MongoDB as a database software makes it an ideal candidate for almost any database-related project. This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you the step-by-step installation of the MongoDB NoSQL database on AlmaLinux 9. You can follow the same instructions for CentOS and Rocky Linux.

  • An introduction (and how-to) to Plugin Loader for the Steam Deck. - Invidious
  • Self-host a Ghost Blog With Traefik

    Ghost is a very popular open-source content management system. Started as an alternative to WordPress and it went on to become an alternative to Substack by focusing on membership and newsletter. The creators of Ghost offer managed Pro hosting but it may not fit everyone's budget. Alternatively, you can self-host it on your own cloud servers. On Linux handbook, we already have a guide on deploying Ghost with Docker in a reverse proxy setup. Instead of Ngnix reverse proxy, you can also use another software called Traefik with Docker. It is a popular open-source cloud-native application proxy, API Gateway, Edge-router, and more. I use Traefik to secure my websites using an SSL certificate obtained from Let's Encrypt. Once deployed, Traefik can automatically manage your certificates and their renewals. In this tutorial, I'll share the necessary steps for deploying a Ghost blog with Docker and Traefik.