Spring Boot 3.0 Minimum Requirements, Java 17 New Features, and Performance Benchmarks
This article explains that Spring Boot 3.0 requires Java 17 and Spring Framework 6, outlines the 14 new features of Java 17, and presents benchmark results showing Java 17's performance advantages over Java 11 and Java 16 with different garbage collectors.
Hello everyone, I am your friend "Architecture Jun", a architect who writes code and poetry.
Spring Boot 3.0 now has a minimum requirement change: it requires Java 17 and Spring Framework 6 as the baseline.
Java baseline has been raised from Java 8 to Java 17
This was already hinted at in the earliest Spring Boot 3 announcements; Java 17 will become the mainstream version for future projects.
Visit https://start.spring.io and you will see that the default JDK selected by Spring is 17. Following Spring's guidance and supporting JDK 17 is the right choice, and I am optimistic about Java 17's new features.
Java 17’s 14 New Features
306: Restored strict floating‑point semantics
356: Enhanced pseudo‑random number generators
382: New macOS rendering pipeline
391: macOS/AArch64 port
398: Deprecation of the soon‑to‑be‑removed Applet API
403: Strong encapsulation of JDK internal APIs
406: Switch pattern matching (preview)
407: Removal of RMI activation
409: Sealed classes
410: Removal of experimental AOT and JIT compilers
411: Deprecation of the soon‑to‑be‑removed Security Manager
412: External functions and memory API (incubator)
414: Vector API (second incubation)
415: Context‑specific deserialization filters
Which of these 14 features is most useful to you?
How fast is Java 17?
Given the substantial updates, should developers upgrade? OptaPlanner performed a benchmark comparing JDK 17, JDK 16, and JDK 11.
Benchmark Summary
On average, using OptaPlanner as the test case, the results show:
1. With G1GC (default), Java 17 is 8.66% faster than Java 11 and 2.41% faster than Java 16.
2. With ParallelGC, Java 17 is 6.54% faster than Java 11 and 0.37% faster than Java 16.
3. ParallelGC is 16.39% faster than G1GC.
In conclusion, Java 17 offers noticeable performance improvements and is the recommended baseline for Spring Boot 3.0 projects.
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