Memory leaks in Node.js can be silent killers for your applications. They degrade performance, increase costs, and eventually lead to crashes. Let’s break down common causes and actionable strategies to prevent or fix them.
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Python: Using PyGame for real-time visualization of audio signals with a 44100 Hz sampling rate
PyGame is a popular library for developing 2D games in Python. The initial version of PyGame was presented by Pete Shinners in October 2000, and since then, the library has gradually gained popularity due to its ease of use, good documentation, and active community. Initially designed to work with early versions of Python (including Python 2), PyGame was based on the SDL 1 library. SDL is a cross-platform library in C that provides low-level access to audio devices, keyboard, mouse, and graphical functions via OpenGL, DirectX, etc.
The current versions 2.x fully support Python 3 (from 3.7 and above) and include a range of updates, such as improved OpenGL support, hardware acceleration, and the ability to work with vertical synchronization on monitors (VSync).
This article discusses an unconventional application of PyGame - the rapid display of graphs, for example, data streams with a 44100 Hz sampling rate from a sound card, which may be necessary for visualizing audio signals.
For such a task, the following functions and capabilities of PyGame are well-suited:
pygame.display.flip() - quickly updates the screen content after changes
#have been made.
#
Using pygame.time.Clock() - allows you to control FPS,
which enables the system to request updates
at up to 60 frames per second or more, which is
important for displaying signals in real-time.
#
The new vsync flag (for example, passed to set_mode with
the pygame.RESIZABLE or pygame.OPENGL parameter)
can be used to synchronize screen updates with
the display's vertical refresh rate.The main loop (typical in PyGame):
running = True
while running:
# Обработка событий
# Генерация шума и обновление данных графика
# Очистка экрана
# Отрисовка сетки и графика
# Подсчет и отображение FPS
# Обновление экрана
pygame.display.flip()
clock.tick(FPS)
pygame.quit()Article
Image Recognition – Why AI is Still Not the Perfect Assistant in This Task, and How image captcha solver Helped
Easy
7 min
Case
Translation
Up to a certain point, I sincerely believed that in today’s world manual CAPTCHA recognition was gradually becoming an anachronism, especially when it came to such simple CAPTCHAs as image-based ones—where one merely needs to read text off a photograph and input it as plain text. But as it turns out, things aren’t quite so straightforward (no matter how it may sound).
Post
Based on the heated discussions and criticism regarding the slow code and poor FPS in the test for displaying the sin()+noise graph using Python Matplotlib, improvements were made, and AI was employed to refine the code. The original article and code have undergone the following enhancements:
Abandoning the slow text output.
Utilizing FuncAnimation instead of a simple loop.
Implementing the magic command to connect the PyQT backend
As a result, the FPS increased from 12 to 100. For more details,
please refer to the original article. https://habr.com/ru/articles/878002/
Article
How to Use DeepSeek-R1 LLM in Obsidian: The Ultimate Guide
Easy
3 min
Tutorial
Do you want to use a local LLM inside Obsidian, similar to ChatGPT, completely free? If yes, then this guide is for you! I'll walk you through the exact steps to install and use DeepSeek-R1 Model in Obsidian, so you can have an AI-powered second brain right inside your notes.
News
Итоги опроса русскоязычного PHP-комьюнити 2024
1 min
31 января в прямом эфире обсудили результаты опроса русскоязычного PHP-сообщества!
Валентин Удальцов, Иван Поддубный, Алексей Гагарин, Кирилл Несмеянов, Александр Макаров, Сергей Пантелеев и я (Данил Щуцкий) обсудили текущее состояние дел и тренды, которые определяют будущее PHP.
Article
Self-assessment of the quality of OKRs planning
Medium
3 min
Tutorial
Intro:
This document is designed to assist managers and teams in crafting high-quality OKRs that maintain focus on executing the company's strategy and achieving ambitious results.
It is recommended to use these quality checklists during quarterly planning when formulating OKRs for the new period.
They will help you find potential areas of improvement and strengthen your OKRs.
Article
DeepSeek AI: China’s AI that Crushed OpenAI (Quick Guide)
Easy
4 min
Tutorial
As someone who's always curious about the latest advancements in AI technology, I discovered DeepSeek. It's an AI model that has been making waves in the tech community for the past few days. In this article, I'll share my experience with DeepSeek, covering its features, how it compares to ChatGPT, and a practical guide on installing it locally.
Article
An in-depth comparison of the three main kinds of runtime type checkers to my new tool
Medium
14 min
Analytics
tl;dr; in the modern TS/JS landscape and overall tooling trends, better stick with static code generators, they are more performant in many ways, easier to integrate into apps, other tools and the multitude of modern JS runtimes. My new tool is as good as other static code generators, but it also produces strictly type safe code and unit tests for you.
This post goes into a rather deep comparison of my new tool Type Predicate Generator (from here just Generator) to other runtime type checkers, also giving a rather broad overview of the related topics. To get a sense of what it does try checking the Playground first.
If you're about to create your first tool for the TypeScript ecosystem the insights in this article will help you hit the ground running.
Article
Right now: Business Expansion
Easy
2 min
Opinion
I wanted to come on here and tell all of you that we should be expecting a big increase in international business in the next short period of time. I would expect this increase within these next few months.
Changes are happening right now in America that are World sweeping. Just today the news is extreme about the ending of the war and promoting of international business.
It’s extremely important that if you are running an IT company that you are ready to take advantage of this.
Article
The State of Caravel: the First Look [Мучения в проектировании чипов из-за Докера и Питона]
47 min
Review
Написал лонгрид на английском о текущем состоянии открытых средств проектирования ASIC-ов. Заодно познакомил англоязычных читателей с практиками шаманов Сибири и фигурой Ивана Сусанина. Упомянул планируемые семинары в Мексике и Армении.
A text on the current state of Open-source ASIC design tools. Includes side discussions of the upcoming hackathons in Mexico and Armenia, Docker and Python, Static Timing Analysis and RISC-V, Siberian shamans and treacherous swamps in Belarus.
Article
UI/UX trends to keep an eye on in 2025
Easy
3 min
Retrospective
Trends change rapidly in UI/UX, and new year means quite a few new emerging innovations that designers should be aware of in order to create relevant and engaging designs. Some trends stay on from previous years, some are completely new, and some might end up being the fleeting ones, so it’s important to pearl off those that truly elevate user experience and make a better impact on your product. Let’s discuss some of the most anticipated UI/UX trends of the coming year.
Article
How we test the backend
Easy
13 min
Case
We are a brokerage platform operating in a dynamic and complex domain. This specificity comes with a set of challenges. On the one hand, it entails a high variability of scenarios and potentially significant risks associated with errors. On the other hand, it has short development iterations with frequent delivery cycles.
In this article, we will share how we maintain the quality of our numerous backend services, which provide essential information to our trading terminals.
Article
A Beginner’s Guide to Obsidian: Master Your Notes and Ideas
3 min
Tutorial
If you're like me, you’ve probably tried countless apps to organize your thoughts, notes, and ideas. Then, I discovered Obsidian, which completely changed how I work. In this article, I’ll give you an easy-to-follow Obsidian tutorial to help you get started. We’ll talk about how to use Obsidian, its key features, and why it’s one of the best tools for note-taking.
Article
DAO: Creativity in the Liquid State
2 min
Recovery Mode
The photograph accompanying this article captures a moment I once witnessed on a beach in Silicon Valley, California. The endless waves of the Pacific Ocean stretch into the distance, fading and dissolving into the sand. All three states of matter are present here: the solid, unmoving sand; the liquid, flowing water; and the wind — invisible yet tangible chaos of air. This landscape seems to symbolize the transitions and boundaries between order and freedom, between stability and change.
This very scene inspired me to reflect on how DAOs, Decentralized Autonomous Organizations, transform into a "third state" for communities. They combine the chaotic freedom of scattered individuals and the structured order of centralized organizations, creating something new — fluid and adaptive.
Article
Apache Kafka… Basics to drive
Medium
5 min
Review
Apache Kafka is a distributed event-streaming platform designed to handle real-time data feeds. It allows applications to publish, process, and subscribe to streams of data in a highly scalable, fault-tolerant manner.
Article
How I Use ChatGPT Prompts to Simplify My Life in 2025
Easy
3 min
Case
Today, I want to share something that has genuinely changed the way I approach learning, working, and even managing my day-to-day life. If you’ve ever felt stuck, overwhelmed, or in need of a fresh perspective, then this video is for you. Let me introduce you to AI prompts that can transform your life. Each one has a specific role and is designed to help you tackle challenges in different areas.
Article
Kill the Troll. Engineering Tale
Medium
19 min
Have you ever struggled to turn business ideas into a product? Or tried to understand the way another team works?
If you have, you know how exhausting it can be. Different ways of thinking –business, analysis, and engineering – don’t always fit together easily.
This article blends a simple story with engineering tools to show how creativity and structure can work together. Using characters like The King, The Troll, and The Prince, it explores how storytelling can help solve tough problems and make complex ideas clearer.
If you’ve ever faced a "troll" at work, this story might help you see things differently – and maybe even make the process a bit more fun.
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Заголовок: Я переписал react-query | Легковесный хук для асинхронного получения данных и кэширования в React
Привет всем!
Я разработал легковесный React-хук, аналогичный React Query, с основными функциями: получение данных, кэширование, повторные попытки и др. Он компактнее и проще в настройке. Полный код доступен на GitHub и в npm как api-refetch.
Зачем создавать собственный хук?
Легковесность: React Query и SWR мощные, но крупные. Мой хук идеален, когда важен размер пакета, особенно для зависимостей вроде Intlayer.
Настройка и оптимизация: Возможность хранения данных в локальном хранилище и управления параллельными запросами. Копируя или клонируя код, можно удалить ненужные функции, уменьшив размер бандла и повысив производительность.
Без провайдера: Избегаю использования Context Provider для глобального доступа, предлагая версию на базе Zustand.
Учебное упражнение: Понимание внутренностей кэширования и управления состоянием.
Создание собственного хука позволило сосредоточиться на нужных функциях, сохраняя библиотеку маленькой и понятной.
Функции
Получение данных и управление состоянием: Загрузка, ошибки, успешные данные.
Кэширование и хранение: Через React или Zustand, поддержка локального хранилища.
Повторные попытки и валидация: Настраиваемые лимиты и интервалы.
Активация и инвалидизация: Управление запросами в зависимости от других данных.
Параллельные запросы: Предотвращение дублирования запросов при монтировании нескольких компонентов.
Пример использования
Установка
Клонируйте репозиторий или установите через npm:
npm install api-refetch
Быстрый пример
import { AsyncStateProvider, useAsync } from "api-refetch";
function App() {
return (
<AsyncStateProvider>
<UserDetails />
</AsyncStateProvider>
);
}
const fetchUserData = async () => {
return new Promise((resolve) => {
setTimeout(() => {
resolve({ name: "John Doe" });
}, 1000);
});
};
const UserDetails = () => {
const { isLoading, data, error, revalidate } = useAsync(
"userDetails",
fetchUserData,
{
enable: true,
cache: true,
store: true,
retryLimit: 3,
retryTime: 10000,
autoFetch: true,
revalidation: true,
revalidateTime: 300000,
onSuccess: (data) => console.log("Данные получены:", data),
onError: (error) => console.error("Ошибка:", error),
}
);
if (isLoading) return <div>Загрузка...</div>;
if (error) return <div>Ошибка: {error}</div>;
return (
<div>
<h1>{data?.name}</h1>
<button onClick={revalidate}>Обновить</button>
</div>
);
};
Попробуйте api-refetch, сообщите об ошибках или внесите вклад. Обратная связь приветствуется!
GitHub: api-refetch
Счастливого кодинга!