chromium/third_party/blink/web_tests/external/wpt/js-self-profiling/tentative/README.md

Tests in this directory are for the proposed js-self-profiling API marker extension. This is not yet standardised and browsers should not be expected to pass these tests.

See the explainer at https://github.com/WICG/js-self-profiling/blob/main/markers.md for more information about the API.