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io: add type-specific read/write methods

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This seriously improves the serialization/deserialization performance for
several reasons:
 * no time spent in `binary` reflection
 * no memory allocations being made on every read/write
 * uses fast ReadBytes everywhere it's appropriate

It also makes Fixed8 Serializable just for convenience.
This commit is contained in:
Roman Khimov 2019-12-12 18:52:23 +03:00
parent 89d7f6d26e
commit 54d888ba70
43 changed files with 441 additions and 205 deletions
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19
pkg/core/dao.go
View file

@ -449,8 +449,7 @@ func (dao *dao) GetTransaction(hash util.Uint256) (*transaction.Transaction, uin
}
r := io.NewBinReaderFromBuf(b)
var height uint32
r.ReadLE(&height)
var height = r.ReadU32LE()
tx := &transaction.Transaction{}
tx.DecodeBinary(r)
@ -476,9 +475,8 @@ func (dao *dao) PutCurrentHeader(hashAndIndex []byte) error {
func read2000Uint256Hashes(b []byte) ([]util.Uint256, error) {
r := bytes.NewReader(b)
br := io.NewBinReaderFromIO(r)
lenHashes := br.ReadVarUint()
hashes := make([]util.Uint256, lenHashes)
br.ReadLE(hashes)
hashes := make([]util.Uint256, 0)
br.ReadArray(&hashes)
if br.Err != nil {
return nil, br.Err
}
@ -502,12 +500,12 @@ func (dao *dao) StoreAsBlock(block *Block, sysFee uint32) error {
buf = io.NewBufBinWriter()
)
// sysFee needs to be handled somehow
// buf.WriteLE(sysFee)
// buf.WriteU32LE(sysFee)
b, err := block.Trim()
if err != nil {
return err
}
buf.WriteLE(b)
buf.WriteBytes(b)
if buf.Err != nil {
return buf.Err
}
@ -517,8 +515,9 @@ func (dao *dao) StoreAsBlock(block *Block, sysFee uint32) error {
// StoreAsCurrentBlock stores the given block witch prefix SYSCurrentBlock.
func (dao *dao) StoreAsCurrentBlock(block *Block) error {
buf := io.NewBufBinWriter()
buf.WriteLE(block.Hash().BytesLE())
buf.WriteLE(block.Index)
h := block.Hash()
h.EncodeBinary(buf.BinWriter)
buf.WriteU32LE(block.Index)
return dao.store.Put(storage.SYSCurrentBlock.Bytes(), buf.Bytes())
}
@ -526,7 +525,7 @@ func (dao *dao) StoreAsCurrentBlock(block *Block) error {
func (dao *dao) StoreAsTransaction(tx *transaction.Transaction, index uint32) error {
key := storage.AppendPrefix(storage.DataTransaction, tx.Hash().BytesLE())
buf := io.NewBufBinWriter()
buf.WriteLE(index)
buf.WriteU32LE(index)
tx.EncodeBinary(buf.BinWriter)
if buf.Err != nil {
return buf.Err