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News February 2022

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Back to newsletter 255 contents

As usual just before each Java release, I'm listing all the new performance features in the upcoming release, this time of Java 18 (I have done this every 6 months prior to each new release, you can track back to the previous February and August newsletters if you want to see what's new performance-wise in any particular release). Each time I give the new features, the performance benefits from each feature, and how to use the feature.

Java 18 is very light on performance changes. I found this surprising. Java 17 was a Long Term Support (LTS) release, and no one wanted to make a significant change in that release because it is supported for a long time, so all the significant changes had been in earlier releases. I expected that meant there was a backlog of changes that would go into Java 18. But not much has turned up.

Perhaps the most significant performance change in Java 18 is JEP 421: Deprecate Finalization for Removal. Not so much for the actual deprecation, but for the detailed contents of the JEP itself - it's a very clear well written coverage of all the things that are wrong with using finalize() and the alternatives available to you. If you are an advanced Java developer, you should read it.

Now on to the details of those Java 18 changes, including the options you have available to use them. And of course the tips from this month's articles, as ever are extracted into this month's tips page.

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Java performance tuning related news - Java 18 performance changes

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Jack Shirazi


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Last Updated: 2022-04-29
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