From c389c6beacf66b6b455b28a5e5f8e703a13363c5 Mon Sep 17 00:00:00 2001
From: Max Revitt <max@revitt.consulting>
Date: Thu, 16 May 2024 08:43:07 +0100
Subject: [PATCH] tweak(plainstate): add close func to close cursors (#10368)

If repeatedly using the plainstate in an iteration you can end up with
so many cursors that tx.Rollback/Commit takes a very long time. The fix
is to clean up the cursors as you go with Close() on the plainstate.
---
 core/state/plain_readonly.go | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/core/state/plain_readonly.go b/core/state/plain_readonly.go
index b002ae61197..3b74ef47c11 100644
--- a/core/state/plain_readonly.go
+++ b/core/state/plain_readonly.go
@@ -76,6 +76,13 @@ func NewPlainState(tx kv.Tx, blockNr uint64, systemContractLookup map[libcommon.
 	return ps
 }
 
+func (s *PlainState) Close() {
+	s.accHistoryC.Close()
+	s.storageHistoryC.Close()
+	s.accChangesC.Close()
+	s.accHistoryC.Close()
+}
+
 func (s *PlainState) SetTrace(trace bool) {
 	s.trace = trace
 }