TrueCloudLab/neoneo-go
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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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14
pkg/vm/context.go
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@ -50,26 +50,22 @@ func (c *Context) Next() (opcode.Opcode, []byte, error) {
}
r := io.NewBinReaderFromBuf(c.prog[c.ip:])
var instrbyte byte
r.ReadLE(&instrbyte)
var instrbyte = r.ReadByte()
instr := opcode.Opcode(instrbyte)
c.nextip++
var numtoread int
switch instr {
case opcode.PUSHDATA1, opcode.SYSCALL:
var n byte
r.ReadLE(&n)
var n = r.ReadByte()
numtoread = int(n)
c.nextip++
case opcode.PUSHDATA2:
var n uint16
r.ReadLE(&n)
var n = r.ReadU16LE()
numtoread = int(n)
c.nextip += 2
case opcode.PUSHDATA4:
var n uint32
r.ReadLE(&n)
var n = r.ReadU32LE()
if n > MaxItemSize {
return instr, nil, errors.New("parameter is too big")
}
@ -92,7 +88,7 @@ func (c *Context) Next() (opcode.Opcode, []byte, error) {
}
}
parameter := make([]byte, numtoread)
r.ReadLE(parameter)
r.ReadBytes(parameter)
if r.Err != nil {
return instr, nil, errors.New("failed to read instruction parameter")
}