From a60ab0ba89289433563c4c0993904acbca8c99ff Mon Sep 17 00:00:00 2001
From: Gregory Maxwell <greg@xiph.org>
Date: Fri, 28 Mar 2014 09:58:40 -0700
Subject: [PATCH] Make GetAvailableCredit run GetHash() only once per
 transaction.

This makes the first getbalance/getinfo 63x faster on my wallet.
---
 src/wallet.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/wallet.h b/src/wallet.h
index e2e89fffe7e86..487c258a20e24 100644
--- a/src/wallet.h
+++ b/src/wallet.h
@@ -620,9 +620,10 @@ class CWalletTx : public CMerkleTx
             return nAvailableCreditCached;
 
         int64_t nCredit = 0;
+        uint256 hashTx = GetHash();
         for (unsigned int i = 0; i < vout.size(); i++)
         {
-            if (!pwallet->IsSpent(GetHash(), i))
+            if (!pwallet->IsSpent(hashTx, i))
             {
                 const CTxOut &txout = vout[i];
                 nCredit += pwallet->GetCredit(txout);