From 8bd52cff0a753d5f6a0bd25b71998ca5249e0cca Mon Sep 17 00:00:00 2001
From: Christopher Jeffrey <chjjeffrey@gmail.com>
Date: Mon, 25 Jul 2016 01:20:26 -0700
Subject: [PATCH] chaindb: cache 25mb of coins.

---
 lib/bcoin/chaindb.js | 10 +---------
 1 file changed, 1 insertion(+), 9 deletions(-)

diff --git a/lib/bcoin/chaindb.js b/lib/bcoin/chaindb.js
index 6d35bb9f..9ffe5be8 100644
--- a/lib/bcoin/chaindb.js
+++ b/lib/bcoin/chaindb.js
@@ -199,15 +199,7 @@ function ChainDB(chain, options) {
   this.cacheWindow = (this.network.pow.retargetInterval + 1) * 2 + 100;
 
   // We want to keep the last 5 blocks of unspents in memory.
-  // Some explanation for the numbers:
-  // Average block output size: 165kb
-  // Average number of outputs: 5000
-  // Average output size: 33.6b
-  // Average number of outputs per tx: 2.2
-  // Average size of outputs per tx: 74b
-  // Average number of txs: 2300
-  // Key size: 66b (* 2)
-  this.coinWindow = ((165 * 1024 + 2300 * 4) + (2300 * 66 * 2)) * 5;
+  this.coinWindow = 25 << 20;
 
   this.coinCache = new bcoin.lru.nil();
   this.cacheHash = new bcoin.lru(this.cacheWindow, 1);