Integrated: 8258553 Limit number of fields in instance to be considered for scalar replacement

Fri Dec 18 21:10:55 UTC 2020

On Fri, 18 Dec 2020 04:27:23 GMT, Igor Veresov <iveresov at openjdk.org> wrote:

> I stumbled upon a test that we have (gc/TestBigObj.java) that has an object with 64k fields and that is scalar replaceable. Doing so puts a lot of strain on the compiler. I ran a few test and benchmarks and the maximum number of fields in scalar-replaced object that I've seen was 59. I think it should be reasonable to set a limit on the number of fields to 512.

This pull request has now been integrated.

Changeset: 7f92d187
Author:    Igor Veresov <iveresov at openjdk.org>
URL:       https://git.openjdk.java.net/jdk/commit/7f92d187
Stats:     10 lines in 2 files changed: 10 ins; 0 del; 0 mod

8258553: Limit number of fields in instance to be considered for scalar replacement

Reviewed-by: kvn, vlivanov

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PR: https://git.openjdk.java.net/jdk/pull/1837