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Legacy code optimization: reducing processing time by 99%

https://sudonull.com/legacy-code-optimization-reducing-processing-time-by-99

How to speed up processing of 75k records in a legacy system in 4 steps. Analysis of overhead costs, batch operations, batch setup and safe scaling. Practical case for Java developers.

ltree in PostgreSQL with JPA: storing trees

https://sudonull.com/ltree-in-postgresql-with-jpa-storing-trees

Integration of ltree for hierarchical data in PostgreSQL and JPA. Performance comparison with recursive SQL. Application in microservices for developers.

Lags retry Spring Kafka: how to fix

https://sudonull.com/lags-retry-spring-kafka-how-to-fix

Diagnosis and fix of lags in @RetryableTopic Spring Kafka under load. Increasing scheduler pool solves the problem. Metrics, threaddump, code. For middle/senior dev.

Java backend courses 2026: top-7 programs

https://sudonull.com/java-backend-courses-2026-top-7-programs

Choose a Java backend course for 2026: Netology, Skillbox, Hexlet. Spring Boot, microservices, internships, AI. Comparison, projects, reviews. Start learning!

From the web

Oct 6, 2009 ·

https://www.oracle.com/java/

Oct 6, 2009 · Join the global Java community and explore Oracle’s role in stewarding the Java platform and supporting open source development across the ecosystem. Access learning paths, tutorials, developer guides, and community resources to help you build with confidence at any stage.

Jul 8, 2026 ·

https://www.geeksforgeeks.org/java/java/

Jul 8, 2026 · Java is a high-level, object-oriented programming language used to build web apps, mobile applications, and enterprise software systems. Java is a platform-independent language, which means code written in Java can run on any device that supports the Java Virtual Machine (JVM).

Searches related to java performance

https://www.tutorialspoint.com/java/index.htm

This Java tutorial has been written for beginners to advanced programmers who are striving to learn Java programming. We have provided numerous practical examples to explain the concepts in simple and easy steps.

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