beacon/engine: prealloc capacity for map and slice (#29903)

mask-pp · web-flow · commit b36c73813c61 · 2024-06-03T15:38:08.000+03:00
* prealloc capacity for map and slice

* revert unnecessary change
diff --git a/beacon/engine/types.go b/beacon/engine/types.go
@@ -209,7 +209,7 @@ func ExecutableDataToBlock(params ExecutableData, versionedHashes []common.Hash,
 	if params.BaseFeePerGas != nil && (params.BaseFeePerGas.Sign() == -1 || params.BaseFeePerGas.BitLen() > 256) {
 		return nil, fmt.Errorf("invalid baseFeePerGas: %v", params.BaseFeePerGas)
 	}
-	var blobHashes []common.Hash
+	var blobHashes = make([]common.Hash, 0, len(txs))
 	for _, tx := range txs {
 		blobHashes = append(blobHashes, tx.BlobHashes()...)
 	}

Original file line number	Diff line number	Diff line change
`@@ -209,7 +209,7 @@ func ExecutableDataToBlock(params ExecutableData, versionedHashes []common.Hash,`
`209`	`209`	`if params.BaseFeePerGas != nil && (params.BaseFeePerGas.Sign() == -1 \|\| params.BaseFeePerGas.BitLen() > 256) {`
`210`	`210`	`return nil, fmt.Errorf("invalid baseFeePerGas: %v", params.BaseFeePerGas)`
`211`	`211`	`}`
`212`		`- var blobHashes []common.Hash`
	`212`	`+ var blobHashes = make([]common.Hash, 0, len(txs))`
`213`	`213`	`for _, tx := range txs {`
`214`	`214`	`blobHashes = append(blobHashes, tx.BlobHashes()...)`
`215`	`215`	`}`