I am using the Lighthouse API to get page load metrics for my site. I'm getting some huge outliers for my Total Blocking Time (TBT) metrics.

Since the results are a little different with each request, I'm taking the average of 5, so I'm making 5 requests per URL I'm testing.

All other metrics differ slightly with each request, except for TBT. Usually it ranges from 0 to about 80, but then sometimes it comes back appx 800. See screenshot below, where TBT is third column of data, and the rows are 5 requests for one URL. The last row is the average.

enter image description here



Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.