Интересная статья о диагностике и устранении проблем с памятью в Java-приложениях. Узнайте о разных видах ошибок: переполнении heap-а и метапространства, утечках собственной памяти, о методах их обнаружения и решения.
Автор описывает улучшение производительности строк в JDK 25. Метод String::hashCode может быть оптимизирован компилятором, используя свертывание констант (constant folding), что улучшает производительность строковых ключей в Map<String, V>.
Интересная статья о диагностике и устранении проблем с памятью в Java-приложениях. Узнайте о разных видах ошибок: переполнении heap-а и метапространства, утечках собственной памяти, о методах их обнаружения и решения.
Автор описывает улучшение производительности строк в JDK 25. Метод String::hashCode может быть оптимизирован компилятором, используя свертывание констант (constant folding), что улучшает производительность строковых ключей в Map<String, V>.
Secure video calling is in high demand. As an alternative to Zoom, many people are using end-to-end encrypted apps such as WhatsApp, FaceTime or Signal to speak to friends and family face-to-face since coronavirus lockdowns started to take place across the world. There’s another option—secure communications app Telegram just added video calling to its feature set, available on both iOS and Android. The new feature is also super secure—like Signal and WhatsApp and unlike Zoom (yet), video calls will be end-to-end encrypted.
Telegram auto-delete message, expiring invites, and more
elegram is updating its messaging app with options for auto-deleting messages, expiring invite links, and new unlimited groups, the company shared in a blog post. Much like Signal, Telegram received a burst of new users in the confusion over WhatsApp’s privacy policy and now the company is adopting features that were already part of its competitors’ apps, features which offer more security and privacy. Auto-deleting messages were already possible in Telegram’s encrypted Secret Chats, but this new update for iOS and Android adds the option to make messages disappear in any kind of chat. Auto-delete can be enabled inside of chats, and set to delete either 24 hours or seven days after messages are sent. Auto-delete won’t remove every message though; if a message was sent before the feature was turned on, it’ll stick around. Telegram’s competitors have had similar features: WhatsApp introduced a feature in 2020 and Signal has had disappearing messages since at least 2016.
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