Jaroslav Tulach created NETBEANS-1593:
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Summary: Debugging slows down JavaScript execution 20x times
Key: NETBEANS-1593
URL: https://issues.apache.org/jira/browse/NETBEANS-1593
Project: NetBeans
Issue Type: Bug
Components: debugger - Java
Reporter: Jaroslav Tulach
While working on
[PR-4|https://github.com/graalvm/graal-js-jdk11-maven-demo/pull/4] I realized
that Truffle debugger support in NetBeans slows down execution 20x times.
Without debugger the benchmark can execute in 150ms. With debugger it takes
more than 3s. At current state the great Truffle debugging feature is not
suitable for a demo.
To reproduce, you need:
* NetBeans 10 VC2
* JDK11
*
[graal-js-jdk11-maven-demo|https://github.com/graalvm/graal-js-jdk11-maven-demo]
at revision 2f851ca6d922
Then you can debug the {{AppTest}} unit test and put a breakpoint to calls to
{{eval}}, etc. Once the breakpoint is hit, remove it and continue. The rest of
the execution will be slow - e.g. take more than 3s for each round.
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