Hi @miconda. Tks for looking at this. Regarding the README it was my bad, I just noticed that I had included it after the PR creation. Initially, I was implementing the modparam with the "is_method" approach but then I found the [methods_filter](https://www.kamailio.org/docs/modules/devel/modules/xlog.html#xlog.p.methods...) that seems more performant. Since it's static the string could be converted at the module initialization to the decimal representation allowing to keep the bitwise comparison.
About your event_route propose, I really like that approach because it also gives the script writer full control. I guess between native or script approaches the performance difference will be negligible.