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core: optimize blockchain init with existing DB

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There is no need to generate genesis block (it's already in the DB) and we can
add all hashes at once without iterating over them.
This commit is contained in:
Roman Khimov 2019-09-11 20:28:49 +03:00
parent 9281348846
commit 7812fb28ea
1 changed files with 7 additions and 12 deletions
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19
pkg/core/blockchain.go
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@ -84,12 +84,6 @@ func NewBlockchain(ctx context.Context, s storage.Store, cfg config.ProtocolConf
}
func (bc *Blockchain) init() error {
genesisBlock, err := createGenesisBlock(bc.config)
if err != nil {
return err
}
bc.headerList = NewHeaderHashList(genesisBlock.Hash())
// If we could not find the version in the Store, we know that there is nothing stored.
ver, err := storage.Version(bc.Store)
if err != nil {
@ -97,6 +91,11 @@ func (bc *Blockchain) init() error {
if err = storage.PutVersion(bc.Store, version); err != nil {
return err
}
genesisBlock, err := createGenesisBlock(bc.config)
if err != nil {
return err
}
bc.headerList = NewHeaderHashList(genesisBlock.Hash())
return bc.persistBlock(genesisBlock)
}
if ver != version {
@ -119,12 +118,8 @@ func (bc *Blockchain) init() error {
return err
}
for _, hash := range hashes {
if !genesisBlock.Hash().Equals(hash) {
bc.headerList.Add(hash)
bc.storedHeaderCount++
}
}
bc.headerList = NewHeaderHashList(hashes...)
bc.storedHeaderCount = uint32(len(hashes))
currHeaderHeight, currHeaderHash, err := storage.CurrentHeaderHeight(bc.Store)
if err != nil {