--- title: Best JVM posts — September 2025 | daily.dev description: The most upvoted JVM posts from September 2025, curated by the daily.dev community. canonical: https://daily.dev/tags/jvm/best-of/2025/09 twitter:card: summary_large_image twitter:site: @dailydotdev og:url: https://daily.dev/tags/jvm/best-of/2025/09 og:type: website og:site_name: daily.dev og:title: Best JVM posts — September 2025 | daily.dev og:description: The most upvoted JVM posts from September 2025, curated by the daily.dev community. og:image: https://media.daily.dev/image/upload/s--VAY5ToZt--/f_auto/v1724209435/public/daily.dev%20-%20open%20graph --- # Best of JVM — September 2025 1. 1 [](https://daily.dev/posts/how-to-reduce-spring-boot-memory-usage--dsbmzxp6d "How to Reduce Spring Boot Memory Usage?") Article Baeldung · 1y How to Reduce Spring Boot Memory Usage? Spring Boot applications typically consume significant memory (150+ MB) due to JVM architecture, embedded server threads, and framework overhead. Memory usage can be reduced through JVM tuning (serial garbage collector, reduced thread stack size, RAM limits), configuring web server thread pools, container-aware deployment practices, and removing unused dependencies. Key techniques include using -XX:+UseSerialGC, -Xss512k for thread stacks, setting MaxRAM limits, reducing Tomcat threads to 20, and matching JVM flags to container limits. 82 2. 2 [](https://daily.dev/posts/the-jvm-secret-that-makes-code-faster--coacbfjh5 "The JVM Secret That Makes Code Faster!") Video ByteMonk · 52w The JVM Secret That Makes Code Faster! The JVM uses just-in-time (JIT) compilation to continuously optimize code while it runs, unlike traditional ahead-of-time compilation. It starts by interpreting bytecode, then compiles frequently used methods into optimized machine code. This adaptive approach allows JVM applications to improve performance over time by learning from real execution patterns, making it ideal for long-running services despite slower startup times. 25 1 3. 3 [](https://daily.dev/posts/stable-values-in-java-25-omd0s2ix5 "Stable Values in Java 25") Article Baeldung · 50w Stable Values in Java 25 Java 25 introduces the Stable Value API (JEP 502) to solve the trade-off between immutability and delayed initialization. StableValue acts as a thread-safe wrapper that guarantees single initialization while enabling deferred computation of expensive objects. The API includes StableSupplier for lazy initialization, StableList and StableMap for collections with on-demand element computation, and StableFunction for memoized function calls. This approach maintains immutability benefits and JVM optimization opportunities while avoiding upfront initialization costs that can slow application startup. 15 4. 4 [](https://daily.dev/posts/java-21-25-performance-and-runtime-enhancements-roadto25-inside-java-8dgutsyh0 "Java 21 ⮕ 25: Performance and Runtime Enhancements #RoadTo25 – Inside.java") Article Inside Java · 1y Java 21 ⮕ 25: Performance and Runtime Enhancements #RoadTo25 – Inside.java Billy Korando breaks down the key performance and runtime enhancements between Java 21 and Java 25, covering important updates like Compact Object Headers, ZGC improvements, and JFR enhancements. This comprehensive overview helps organizations understand the significant changes across multiple Java releases without having to review extensive release notes. 15 [See all JVM archives](/tags/jvm/best-of) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@graph":[{"@type":"CollectionPage","@id":"https://daily.dev/tags/jvm/best-of/2025/09#page","url":"https://daily.dev/tags/jvm/best-of/2025/09","name":"Best JVM Posts — September 2025","description":"The most upvoted JVM posts from September 2025, curated by the daily.dev community.","isPartOf":{"@type":"WebSite","url":"https://daily.dev"}},{"@type":"ItemList","@id":"https://daily.dev/tags/jvm/best-of/2025/09#items","numberOfItems":4,"itemListElement":[{"@type":"ListItem","position":1,"url":"https://daily.dev/posts/how-to-reduce-spring-boot-memory-usage--dsbmzxp6d","name":"How to Reduce Spring Boot Memory Usage?"},{"@type":"ListItem","position":2,"url":"https://daily.dev/posts/the-jvm-secret-that-makes-code-faster--coacbfjh5","name":"The JVM Secret That Makes Code Faster!"},{"@type":"ListItem","position":3,"url":"https://daily.dev/posts/stable-values-in-java-25-omd0s2ix5","name":"Stable Values in Java 25"},{"@type":"ListItem","position":4,"url":"https://daily.dev/posts/java-21-25-performance-and-runtime-enhancements-roadto25-inside-java-8dgutsyh0","name":"Java 21 ⮕ 25: Performance and Runtime Enhancements #RoadTo25 – Inside.java"}]},{"@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Tags","item":"https://daily.dev/tags"},{"@type":"ListItem","position":3,"name":"JVM","item":"https://daily.dev/tags/jvm"},{"@type":"ListItem","position":4,"name":"Best of","item":"https://daily.dev/tags/jvm/best-of"},{"@type":"ListItem","position":5,"name":"September 2025"}]}]} ```