From 0730acc5a01e683176b31ef0fcdf0d965a47d14a Mon Sep 17 00:00:00 2001
From: "@edgararout" <edgar.factorial@gmail.com>
Date: Wed, 28 Jul 2021 08:24:41 -0400
Subject: [PATCH] consensus/ethash: less allocation during mining (#23199)
---
consensus/ethash/sealer.go | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/consensus/ethash/sealer.go b/consensus/ethash/sealer.go
index 1830e672b..6fa60ef6a 100644
--- a/consensus/ethash/sealer.go
+++ b/consensus/ethash/sealer.go
@@ -140,8 +140,9 @@ func (ethash *Ethash) mine(block *types.Block, id int, seed uint64, abort chan s
)
// Start generating random nonces until we abort or find a good one
var (
- attempts = int64(0)
- nonce = seed
+ attempts = int64(0)
+ nonce = seed
+ powBuffer = new(big.Int)
)
logger := ethash.config.Log.New("miner", id)
logger.Trace("Started ethash search for new nonces", "seed", seed)
@@ -163,7 +164,7 @@ search:
}
// Compute the PoW value of this nonce
digest, result := hashimotoFull(dataset.dataset, hash, nonce)
- if new(big.Int).SetBytes(result).Cmp(target) <= 0 {
+ if powBuffer.SetBytes(result).Cmp(target) <= 0 {
// Correct nonce found, create a new header with it
header = types.CopyHeader(header)
header.Nonce = types.EncodeNonce(nonce)
--
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