Commit8bd4b89

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Try to save a kernel call in ResolveRecoveryConflictWithVirtualXIDs.

If there's no work to be done, just exit quickly, before initialization.

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Original file line number	Diff line number	Diff line change
`@@ -193,6 +193,10 @@ ResolveRecoveryConflictWithVirtualXIDs(VirtualTransactionId *waitlist,`
`193`	`193`	`TimestampTzwaitStart;`
`194`	`194`	`char*new_status;`
`195`	`195`
	`196`	`+/* Fast exit, to avoid a kernel call if there's no work to be done. */`
	`197`	`+if (!VirtualTransactionIdIsValid(*waitlist))`
	`198`	`+return;`
	`199`	`+`
`196`	`200`	`waitStart=GetCurrentTimestamp();`
`197`	`201`	`new_status=NULL;/* we haven't changed the ps display */`
`198`	`202`

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