Add Delayed Messages API Explainer #1029
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- Updated problem description to clarify causes of `postMessage` delays and challenges in identifying root causes. - Expanded explanation of deserialization timing inconsistencies across browsers. - Refined summary of problems to emphasize the need for a dedicated API for diagnosing `postMessage` delays. - Improved description of `PerformanceExecutionContextInfo.name` to clarify optionality for workers and windows/iframes. - Removed "It adds boilerplate code and maintenance overhead" in manual instrumentation section. - Added missing reference to the Event Timing API in the references section. - Update congested example to remove IndexedDB references
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A few housekeeping items:
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SteveBeckerMSFT
approved these changes
Jun 3, 2025
…gements' sections
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@sfortiner I’ve updated the explainer to include:
Thank you! |
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The Delayed Messages API allows web developers to identify congested browser contexts or workers and provide details on the end-to-end timing of postMessage events, as well as their related blocking tasks.