mbien opened a new issue, #7663:
URL: https://github.com/apache/netbeans/issues/7663
### Body
while debugging a problem I noticed a performance anomaly while debugging NB
23 with NB 22.
benchmark:
- clear the test userdir (nbbuild/testuserdir/)
- start debugging a NB module
- create a new maven project using the dev build ide, measure the time
between pressing finish and project open
results:
```
NB run1 run2 run3
22 42s 6:33
21 46s 7:04 38s
20 1:10
19 1:05 18s
```
The first observation is that the time is vastly different between runs. But
even the faster runs are surprisingly slow. This is also no recent regression
since I tested even NB 19.
The second observation is that the number of JarClassLoader warnings
correlated with how long it took, example warning:
```
WARNING [org.netbeans.JarClassLoader]: Opening
/home/mbien/NetBeansProjects/netbeans/nbbuild/netbeans/ide/modules/ext/truffle-api-24.0.0.jar
took 651 ms
```
(there can be a lot of repeating warnings)
async profiler flamegraph showed that a most of the time time is spent in
`org.graalvm.polyglot.*` codepaths.
[truffle_debug.html.zip](https://github.com/user-attachments/files/16576462/truffle_debug.html.zip)
[GraalEnginesProvider#enumarateLanguages](https://github.com/apache/netbeans/blob/f6e767325d4c98363794065ba60e559424ae1c2a/ide/libs.graalsdk/src/org/netbeans/libs/graalsdk/impl/GraalEnginesProvider.java#L149)
specifically.
to verify this I uninstalled `GraalVM Debugging Support` and tested again:
```
NB run1 run2
22 2s 3s
```
(don't uninstall the module in your "production" IDE)
(debugging did still work)
This is going to need some more investigations.
### Committer
- [X] I acknowledge that I am a maintainer/committer in the Apache NetBeans
project.
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