Klaus Post 779060bc16 Locker: Improve Refresh speed (#13430) ...

Refresh was doing a linear scan of all locked resources. This was adding 
up to significant delays in locking on high load systems with long 
running requests.

Add a secondary index for O(log(n)) UID -> resource lookups. 
Multiple resources are stored in consecutive strings.

Bonus fixes:

 * On multiple Unlock entries unlock the write locks we can.
 * Fix `expireOldLocks` skipping checks on entry after expiring one.
 * Return fast on canTakeUnlock/canTakeLock.
 * Prealloc some places.

2021-10-15 03:12:13 -07:00

7.1 KiB

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