Groovy @CompileStatic is slow and leaks resources

LeakDynamic.java

import groovy.lang.GroovyClassLoader;

class LeakDynamic {

    public static interface TestClass {
        String getThingy();
    }

    static String getTheThingy() {
        return "the thingy";
    }

    @SuppressWarnings("unchecked")
    public static void main(String[] args) throws Exception {
        for (int i = 0; i < 1000; i++) {
            var cl = new GroovyClassLoader();
            var c = cl.parseClass("class TestClass" + i + " implements LeakDynamic.TestClass { public String getThingy() { return LeakDynamic.getTheThingy(); } }");
            var t = (TestClass) c.getConstructor().newInstance();
            assert t.getThingy() == getTheThingy();
        }
    }
}

LeakStatic.java

import groovy.lang.GroovyClassLoader;

class LeakStatic {

    public static interface TestClass {
        String getThingy();
    }

    static String getTheThingy() {
        return "the thingy";
    }

    @SuppressWarnings("unchecked")
    public static void main(String[] args) throws Exception {
        for (int i = 0; i < 1000; i++) {
            var cl = new GroovyClassLoader();
            var c = cl.parseClass("class TestClass" + i + " implements LeakStatic.TestClass { @groovy.transform.CompileStatic public String getThingy() { return LeakStatic.getTheThingy(); } }");
            var t = (TestClass) c.getConstructor().newInstance();
            assert t.getThingy() == getTheThingy();
        }
    }
}

test-dynamic.sh

#!/bin/sh

sdk install groovy 3.0.11

javac -cp ~/.sdkman/candidates/groovy/3.0.11/lib/groovy-3.0.11.jar LeakDynamic.java

# Lowering the heap to 16 MiB is still OK.
export JAVA_OPTS="-Xmx32M -XX:+HeapDumpOnOutOfMemoryError -Xlog:class+unload=info"
# Way faster than with CompileStatic.
time java $JAVA_OPTS -cp ~/.sdkman/candidates/groovy/3.0.11/lib/groovy-3.0.11.jar:. LeakDynamic

test-static.sh

#!/bin/sh

sdk install groovy 3.0.11

javac -cp ~/.sdkman/candidates/groovy/3.0.11/lib/groovy-3.0.11.jar LeakStatic.java

# Lowering the heap to 16 MiB leads to OOM.
export JAVA_OPTS="-Xmx32M -XX:+HeapDumpOnOutOfMemoryError -Xlog:class+unload=info"
# Way faster than without CompileStatic.
time java $JAVA_OPTS -cp ~/.sdkman/candidates/groovy/3.0.11/lib/groovy-3.0.11.jar:. LeakStatic