https://sudonull.com/webflux-and-virtual-threads-comparison-at-2000-rps-analysis
Performance comparison of Spring WebFlux and virtual threads under 2000 requests per second load. Key differences, limitations, and recommendations for developers.
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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.
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.
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.
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!
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