Is this bad? System/Library/PrivateFrameworks/PowerlogCore.framework/XPCServices/PerfPowerServicesSignpostReader.xpc/
iPhone 14 Pro Max, iOS 16
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Is this bad?
If a service gets busy once in a while, no.
The tests that this service ran afoul of (and presumably then got restarted for) exist for a reason.
If there is a pattern of increasing busyness, maybe.
If you are (also) seeing visible symptoms of issues or malfunctions without resorting to reading analytics logs, yes.
In the lattermost case, contact Apple Support using the Support link in the lower left corner of this webpage.