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less allocation of big int during for loop in ethash #23199

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merged 1 commit into from Jul 28, 2021
Merged

less allocation of big int during for loop in ethash #23199

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7 changes: 4 additions & 3 deletions consensus/ethash/sealer.go
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Expand Up @@ -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)
Expand All @@ -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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