Commits on Sep 28, 2023

1. catalog/lease: reduce lock contention on descVersionState …

   Recently, a regression was noticed on master related to AcquireByName
   being slower between builds. Using a profiler, this was tracked down to
   contention on descriptorVersionState's mutex.  To address this, this
   patch avoids acquiring this lock twice in the hot path, which resolves
   the regression.
   
   After:   BenchmarkLeaseAcquireByNameCached-24    	 2378610	       451.9 ns/op
   Before:  BenchmarkLeaseAcquireByNameCached-24    	 1493899	       727.9 ns/op
   f13c021: BenchmarkLeaseAcquireByNameCached-24    	 2129446	       568.1 ns/op
   
   Fixes: cockroachdb#111094
   
   Release note: None

   

   fqazi committed Sep 28, 2023
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