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perf_hooks: measure() should allow endMark to be omitted #32647
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targos
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Make `startMark` and `endMark` parameters optional. PR-URL: #32651 Fixes: #32647 Refs: https://www.w3.org/TR/user-timing-2/#measure-method Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Chengzhong Wu <[email protected]> Reviewed-By: James M Snell <[email protected]>
BethGriggs
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Apr 14, 2020
Make `startMark` and `endMark` parameters optional. PR-URL: #32651 Fixes: #32647 Refs: https://www.w3.org/TR/user-timing-2/#measure-method Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Chengzhong Wu <[email protected]> Reviewed-By: James M Snell <[email protected]>
targos
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Apr 22, 2020
Make `startMark` and `endMark` parameters optional. PR-URL: #32651 Fixes: #32647 Refs: https://www.w3.org/TR/user-timing-2/#measure-method Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Chengzhong Wu <[email protected]> Reviewed-By: James M Snell <[email protected]>
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What steps will reproduce the bug?
How often does it reproduce? Is there a required condition?
Always. No condition.
What is the expected behavior?
Undefined is returned.
What do you see instead?
Additional information
Throwing an exception when an endMark parameter is is not passed to
measure()
is documented behavior in Node.js, but W3C User Timing Level 2 version 20190226 says it should default to a value ofperformance.now()
if left undefined.Node's documentation also states "This is the same Performance API as implemented in modern Web browsers," but in this case the behavior is different, because
measure()
does not throw an exception in this circumstance in evergreen web browsers.The text was updated successfully, but these errors were encountered: