Hey! If you want to test out logging performance, look no further! This repo has a test set up to capture how long a perform takes (also noting how long the actual post_poll function runs, so you can do the math to see how long we spend logging).
To run the test yourself, clone the repo. Then install via yarn. I linked mine to a local zapier-platform clone via yarn link so I could test out different branches etc. Finally, all tests were run via yarn test --timeout=60000 and I copied the perf_test output generated via test/triggers/perf_test.js.