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Java 13 is released in less than a month. As usual I'm listing all the new performance features in the release, just as I now do every 6 months with each new Java version. The new features, the performance benefits from each feature, and how to use the feature.

Of the new performance features released in Java 13, JEP 353: "Reimplement the Legacy Socket API" is one that you need to plan extensive testing for. Although intended to be a nearly totally transparent drop-in replacement of the existing Socket implementation, they point out that edge cases will behave differently. That sounds innocuous, but my experience of applications using network IO in any intensive way is that edge cases abound, with lots of code dependent on particular behaviour that's been encountered and specially handled.

On the plus side, timeouts on sockets were always a little unreliable, and with the new implementation they should be much more reliable. Now on with details of those Java 13 changes, including the options you have available to use them, relevant tools and articles, and of course all the useful performance tips in from those articles extracted into this month's tips page.

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Jack Shirazi

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Last Updated: 2022-06-29
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