1127392 - Web Platform User Timing Mark Time Comparison Tests fail intermittently on Windows XP Opt

Status: RESOLVED WONTFIX

(Core :: DOM: Core & HTML, defect)

Description

[Kyle Machulis [:qdot] [:kmachulis] (INACTIVE)]

18:19:33     INFO - TEST-UNEXPECTED-FAIL | /user-timing/test_user_timing_mark.html | window.performance.getEntriesByName("mark1")[0].startTime ~== 33 (up to 20ms difference allowed) - assert_true: window.performance.getEntriesByName("mark1")[0].startTime ~== 33 (up to 20ms difference allowed) expected true got false
18:19:33     INFO - TEST-UNEXPECTED-FAIL | /user-timing/test_user_timing_mark.html | window.performance.getEntriesByName("mark1")[1].startTime ~== 313 (up to 20ms difference allowed) - assert_true: window.performance.getEntriesByName("mark1")[1].startTime ~== 313 (up to 20ms difference allowed) expected true got false

These tests pass on every other platform, including Windows 7/8. All other tests pass on XP too. This is most likely due to the threshold for the time comparisons being smaller than XP can reliably manage. Unfortunately, due to the nature of the message and the way we check "subtest names" in the web platform metadata, it's hard to turn off just this test since it prints out the expected timings, meaning the number changes every run.

Comment 1

[Kyle Machulis [:qdot] [:kmachulis] (INACTIVE)]

Since we're ESR'ing XP/Vista in 52 (Bug 1303827), marking this as won't fix.