From fef649dfefb37e2a2481973bb2a49108a20f6cc1 Mon Sep 17 00:00:00 2001
From: Con Kolivas <kernel@kolivas.org>
Date: Sun, 11 Aug 2013 13:47:46 +1000
Subject: [PATCH] Cache the binary generation of coinbase1 and 2 on stratum,
 avoiding a hex2bin of coinbase1 and 2 on each work generation.

---
 cgminer.c |  4 ++--
 miner.h   |  2 ++
 util.c    | 11 +++++++++++
 3 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/cgminer.c b/cgminer.c
index f22a44bf..c92589b3 100644
--- a/cgminer.c
+++ b/cgminer.c
@@ -5611,10 +5611,10 @@ static void gen_stratum_work(struct pool *pool, struct work *work)
 	coinbase = calloc(alloc_len, 1);
 	if (unlikely(!coinbase))
 		quit(1, "Failed to calloc coinbase in gen_stratum_work");
-	hex2bin(coinbase, pool->swork.coinbase1, pool->swork.cb1_len);
+	memcpy(coinbase, pool->swork.cb1, pool->swork.cb1_len);
 	hex2bin(coinbase + pool->swork.cb1_len, pool->nonce1, pool->n1_len);
 	hex2bin(coinbase + pool->swork.cb1_len + pool->n1_len, work->nonce2, pool->n2size);
-	hex2bin(coinbase + pool->swork.cb1_len + pool->n1_len + pool->n2size, pool->swork.coinbase2, pool->swork.cb2_len);
+	memcpy(coinbase + pool->swork.cb1_len + pool->n1_len + pool->n2size, pool->swork.cb2, pool->swork.cb2_len);
 
 	/* Generate merkle root */
 	gen_hash(coinbase, merkle_root, pool->swork.cb_len);
diff --git a/miner.h b/miner.h
index a05c1e0a..8b1946e5 100644
--- a/miner.h
+++ b/miner.h
@@ -1066,6 +1066,8 @@ struct stratum_work {
 	char *nbit;
 	char *ntime;
 	bool clean;
+	unsigned char *cb1;
+	unsigned char *cb2;
 
 	size_t cb1_len;
 	size_t cb2_len;
diff --git a/util.c b/util.c
index 16016d05..3af61257 100644
--- a/util.c
+++ b/util.c
@@ -1277,6 +1277,17 @@ static bool parse_notify(struct pool *pool, json_t *val)
 	/* workpadding */	 96;
 	pool->swork.header_len = pool->swork.header_len * 2 + 1;
 	align_len(&pool->swork.header_len);
+
+	free(pool->swork.cb1);
+	free(pool->swork.cb2);
+	pool->swork.cb1 = calloc(pool->swork.cb1_len, 1);
+	if (unlikely(!pool->swork.cb1))
+		quit(1, "Failed to calloc swork cb1 in parse_notify");
+	hex2bin(pool->swork.cb1, pool->swork.coinbase1, pool->swork.cb1_len);
+	pool->swork.cb2 = calloc(pool->swork.cb2_len, 1);
+	if (unlikely(!pool->swork.cb2))
+		quit(1, "Failed to calloc swork cb2 in parse_notify");
+	hex2bin(pool->swork.cb2, pool->swork.coinbase2, pool->swork.cb2_len);
 	cg_wunlock(&pool->data_lock);
 
 	if (opt_protocol) {