From 6bf0a5cb5034a7e684dcc3500e841785237ce2dd Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 19:32:43 +0200 Subject: Adding upstream version 1:115.7.0. Signed-off-by: Daniel Baumann --- .../webtiming-resolution.any.js | 25 ++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 testing/web-platform/tests/performance-timeline/webtiming-resolution.any.js (limited to 'testing/web-platform/tests/performance-timeline/webtiming-resolution.any.js') diff --git a/testing/web-platform/tests/performance-timeline/webtiming-resolution.any.js b/testing/web-platform/tests/performance-timeline/webtiming-resolution.any.js new file mode 100644 index 0000000000..d869c7c52d --- /dev/null +++ b/testing/web-platform/tests/performance-timeline/webtiming-resolution.any.js @@ -0,0 +1,25 @@ +function testTimeResolution(highResTimeFunc, funcString) { + test(() => { + const t0 = highResTimeFunc(); + let t1 = highResTimeFunc(); + while (t0 == t1) { + t1 = highResTimeFunc(); + } + const epsilon = 1e-5; + assert_greater_than_equal(t1 - t0, 0.005 - epsilon, 'The second ' + funcString + ' should be much greater than the first'); + }, 'Verifies the resolution of ' + funcString + ' is at least 5 microseconds.'); +} + +function timeByPerformanceNow() { + return performance.now(); +} + +function timeByUserTiming() { + performance.mark('timer'); + const time = performance.getEntriesByName('timer')[0].startTime; + performance.clearMarks('timer'); + return time; +} + +testTimeResolution(timeByPerformanceNow, 'performance.now()'); +testTimeResolution(timeByUserTiming, 'entry.startTime'); -- cgit v1.2.3