From e1ff0dbe19c3e7df21206d22bb12c686cd130b4c Mon Sep 17 00:00:00 2001
From: Gregory Sanders <gsanders87@gmail.com>
Date: Mon, 19 Dec 2016 09:35:23 -0500
Subject: [PATCH] reduce number of lookups in TransactionWithinChainLimit

---
 src/txmempool.cpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/txmempool.cpp b/src/txmempool.cpp
index a7056554a..63a26da32 100644
--- a/src/txmempool.cpp
+++ b/src/txmempool.cpp
@@ -1137,7 +1137,7 @@ void CTxMemPool::TrimToSize(size_t sizelimit, std::vector<uint256>* pvNoSpendsRe
 
 bool CTxMemPool::TransactionWithinChainLimit(const uint256& txid, size_t chainLimit) const {
     LOCK(cs);
-    if (exists(txid) && std::max(mapTx.find(txid)->GetCountWithAncestors(), mapTx.find(txid)->GetCountWithDescendants()) >= chainLimit)
-        return false;
-    return true;
+    auto it = mapTx.find(txid);
+    return it == mapTx.end() || (it->GetCountWithAncestors() < chainLimit &&
+       it->GetCountWithDescendants() < chainLimit);
 }