G1 收集器在高版本 Java 中优化很大

[zhouhu]

看到下面的文章，G1 收集器在高版本 Java 中优化很大。

https://blogs.oracle.com/javamagazine/post/java-garbage-collectors-evolution

吞吐量： As you can see, the throughput scores increase significantly simply by moving to later JDK releases. JDK 11 improves by around 5% and JDK 18 by around 18%, respectively, compared to JDK 8

延迟： 设置最大停顿时间为 200ms As you can see, the throughput scores increase significantly simply by moving to later JDK releases. JDK 11 improves by around 5% and JDK 18 by around 18%, respectively, compared to JDK 8

设置最大停顿时间为 50ms

	JDK8 200ms	JDK11 200ms	JDK18 200ms	JDK18 50ms
Average (ms)	124	111	89	44
P99 (ms)	176	134	104	56
Relative collection time (%)	n/a	-15.8	-34.4	+0.06

内存占用

With JDK 8, after a short warmup period, G1 native memory usage settles at around 5.8 GB of native memory. JDK 11 improved on that, reducing the native memory footprint to around 4 GB; JDK 17 improved it to around 1.8 GB; and JDK 18 settles at around 1.25 GB of garbage collection native memory usage. This is a reduction of extra memory usage from almost 30% of the Java heap in JDK 8 to around 6% of extra memory usage in JDK 18.

1. 升级 JDK 版本的 V 友说一下系统性能提升大吗？
2. 哪里能看到最新的 G1 性能对比？

[arloor]

强，可惜以后都不写 java 了