Is it planned to consider another script executing engines than janino? There is script evaluator provided by groovy.lang.GroovyShell which can execute java scripts too. I have compared the time to evaluate the same java script by both engines and groovy engine executes significantly faster. Another positive side effect: support of groovy scripts. I believe using of new script evaluator will make improvements to the time of executing transactor functions written in java
https://docs.groovy-lang.org/latest/html/api/groovy/lang/GroovyShell.html
UPD. How much are java transactor scripts executted longer than clojure transactor scripts?