Init connection time grows quadratically

Applying: This patch reduce connection init/close time.
Using index info to reconstruct a base tree...
M	src/backend/access/transam/varsup.c
M	src/backend/commands/indexcmds.c
M	src/backend/commands/vacuum.c
M	src/backend/replication/logical/logical.c
M	src/backend/replication/slot.c
M	src/backend/replication/walsender.c
M	src/backend/storage/ipc/procarray.c
M	src/backend/storage/lmgr/proc.c
Falling back to patching base and 3-way merge...
Auto-merging src/backend/storage/lmgr/proc.c
Auto-merging src/backend/storage/ipc/procarray.c
CONFLICT (content): Merge conflict in src/backend/storage/ipc/procarray.c
Auto-merging src/backend/replication/walsender.c
Auto-merging src/backend/replication/slot.c
Auto-merging src/backend/replication/logical/logical.c
Auto-merging src/backend/commands/vacuum.c
Auto-merging src/backend/commands/indexcmds.c
Auto-merging src/backend/access/transam/varsup.c
Patch failed at 0001 This patch reduce connection init/close time.

error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
hint: When you have resolved this problem, run "git am --continue".
hint: If you prefer to skip this patch, run "git am --skip" instead.
hint: To restore the original branch and stop patching, run "git am --abort".
hint: Disable this message with "git config advice.mergeConflict false"