Test datapack performance

im currently rewriting one of my earliest datapacks because it SUCKS and performs HORRIBLY. on a server with 10 players, it increases mspt by a whopping 20, making the server lag. so, im changing all the nbt checks to predicates, specifying type=marker on all @e selectors and changing the order of my subselectors according to https://www.reddit.com/r/MinecraftCommands/wiki/optimising/#wiki_more_in-depth_optimization now, i wanna see how much it actually impacted performance. sadly, when i use /debug, it doesnt create a debug file where its supposed to. additionally, when i do /debug function, it works just fine. is there a mod that i can use? or maybe a fix?