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Create: 2025-04-23 Update: 2025-07-07 16:37:34

⚙️ JFR + JMC — встроенный профилировщик для JVM-приложений

🔹 Что это

— Java Flight Recorder (JFR) — низкоуровневый инструмент для профилирования, встроенный в JVM начиная с Java 11.
— Java Mission Control (JMC) — утилита для визуального анализа и работы с результатами JFR-записей.

🔹 Возможности

— Сбор информации о производительности с минимальным overhead.
— Анализ CPU, памяти, событий GC, блокировок, Thread dumps и других внутренних событий JVM.
— Отслеживание аллокаций, задержек, пауз и узких мест в приложении.
— Подходит для использования как в разработке, так и в продакшене.

🔹 Как использовать

1. Запустите приложение с параметрами, активирующими запись:

java -XX:StartFlightRecording=duration=60s,filename=recording.jfr ...

2. После завершения записи, откройте файл .jfr в JMC.
3. Используйте интерфейс для анализа производительности и поиска узких мест.

🔹 Преимущества

— Нативная поддержка в JVM.
— Низкий overhead (подходит для продакшн-сценариев).
— Не требует внешних агентов или дополнительных библиотек.
— Удобный интерфейс для анализа.

🐸

Библиотека джависта #буст

Библиотека джависта | Java, Spring, Maven, Hibernate

⚙️

JFR + JMC — встроенный профилировщик для JVM-приложений

🔹 Что это

— Java Flight Recorder (JFR) — низкоуровневый инструмент для профилирования, встроенный в JVM начиная с Java 11.
— Java Mission Control (JMC) — утилита для визуального анализа и работы с результатами JFR-записей.

🔹 Возможности

— Сбор информации о производительности с минимальным overhead.
— Анализ CPU, памяти, событий GC, блокировок, Thread dumps и других внутренних событий JVM.
— Отслеживание аллокаций, задержек, пауз и узких мест в приложении.
— Подходит для использования как в разработке, так и в продакшене.

🔹 Как использовать

1. Запустите приложение с параметрами, активирующими запись:

java -XX:StartFlightRecording=duration=60s,filename=recording.jfr ...

🐸

Библиотека джависта #буст

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How to Create a Custom Theme in Telegram for Desktop and Mobile

Like most instant messaging apps, Telegram helps facilitate communication. Its increasing popularity among social media users can be largely attributed to its enhanced privacy and encryption features. Also, its support for large group chat features has seen the app’s user count grow to 700 million monthly active users. The app has introduced several personalization features to maintain the interests of its users. One of such personalization options available to users is the creation of customized themes. Instead of using the default theme that typically comes with the Telegram app, users can now create theirs. Users can also share the created themes with the public. Here’s how you can create a custom Telegram theme on your desktop or mobile.

⚙️ JFR + JMC — встроенный профилировщик для JVM-приложений

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