fix(service-worker): prevent duplicate fetches during concurrent update checks #61443
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…te checks Previously, multiple simultaneous calls to `checkForUpdate()` could result in redundant fetches and hashing of the update manifest, leading to unnecessary network and CPU usage. This change introduces a mechanism to track an in-progress update check using a cached promise (`ongoingCheckForUpdate`). Subsequent calls to `checkForUpdate()` while a check is in progress will return the same promise instead of triggering a new request. Once the check completes (successfully or not), the cached promise is cleared, allowing future update checks to proceed normally. This improves efficiency and prevents overlapping update logic in applications that may invoke `checkForUpdate()` from multiple sources (e.g. polling, manual triggers).
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Previously, multiple simultaneous calls to
checkForUpdate()could result in redundant fetches and hashing of the update manifest, leading to unnecessary network and CPU usage.This change introduces a mechanism to track an in-progress update check using a cached promise (
ongoingCheckForUpdate). Subsequent calls tocheckForUpdate()while a check is in progress will return the same promise instead of triggering a new request.Once the check completes (successfully or not), the cached promise is cleared, allowing future update checks to proceed normally.
This improves efficiency and prevents overlapping update logic in applications that may invoke
checkForUpdate()from multiple sources (e.g. polling, manual triggers).