RFR: 8273138: BidirectionalBinding fails to observe changes of invalid properties

[Michael Strauß]

On Sun, 29 Aug 2021 04:12:22 GMT, Michael Strauß <mstrauss at openjdk.org> wrote:

> This PR fixes a bug that was introduced in #454.
> 
> Since this fix might impact the performance considerations in the original PR, I ran a performance benchmark against the previous `ChangeListener`-based implementation, which still shows better performance for the new implementation:
> 
> 
> @State(Scope.Benchmark)
> public class BindingBenchmark {
>     DoubleProperty property1 = new SimpleDoubleProperty();
>     DoubleProperty property2 = new SimpleDoubleProperty();
> 
>     public BindingBenchmark() {
>         property2.bindBidirectional(property1);
>     }
> 
>     @Benchmark
>     public void benchmark() {
>         for (int i = 0; i < 10000000; ++i) {
>             property1.set((i % 2 == 0) ? 12345.0 : 54321.0);
>         }
>     }
> }
> 
> 
> | Benchmark | Mode | Cnt | Score | Error | Units |
> |-----------|------|-----|-------|-------|--------|
> | ChangeListener | thrpt | 5 | 7.463 | 0.040 | ops/s |
> | InvalidationListener (fixed) | thrpt | 5 | 15.095 | 0.092 | ops/s |

[It seems to be too late.](https://bugs.openjdk.java.net/browse/JDK-8273138?focusedCommentId=14445309&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14445309)

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PR: https://git.openjdk.java.net/jfx/pull/614