How to disable measure timeline?

[tingshao]

Sorry that this might not be the right place to post this question, let me introduce my background:

We are performing some performance tests on browsers, we have our pages, js files, and we can calculate the perf results using our own js code. So we don't need the timeline metrics which seems will cost a lot of time for generating the results. Telemetry is indeed a good tool for us. So, is there someway to run telemetry benchmark tests and turn off the timeline metrics?
thanks.