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	it would seem like using `bufio.Scan()` is very slow for heavy concurrent I/O, ie. when r.Body is slow , instead use a proper binary exchange format, to marshal and unmarshal the LockArgs datastructure in a cleaner way. this PR increases performance of the locking sub-system for tiny repeated read lock requests on same object. ``` BenchmarkLockArgs BenchmarkLockArgs-4 6417609 185.7 ns/op 56 B/op 2 allocs/op BenchmarkLockArgsOld BenchmarkLockArgsOld-4 1187368 1015 ns/op 4096 B/op 1 allocs/op ```
		
			
				
	
	
		
			251 lines
		
	
	
		
			5.7 KiB
		
	
	
	
		
			Go
		
	
	
	
	
	
			
		
		
	
	
			251 lines
		
	
	
		
			5.7 KiB
		
	
	
	
		
			Go
		
	
	
	
	
	
| package dsync
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| 
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| // Code generated by github.com/tinylib/msgp DO NOT EDIT.
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| 
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| import (
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| 	"github.com/tinylib/msgp/msgp"
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| )
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| 
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| // DecodeMsg implements msgp.Decodable
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| func (z *LockArgs) DecodeMsg(dc *msgp.Reader) (err error) {
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| 	var field []byte
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| 	_ = field
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| 	var zb0001 uint32
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| 	zb0001, err = dc.ReadMapHeader()
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| 	if err != nil {
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| 		err = msgp.WrapError(err)
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| 		return
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| 	}
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| 	for zb0001 > 0 {
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| 		zb0001--
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| 		field, err = dc.ReadMapKeyPtr()
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| 		if err != nil {
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| 			err = msgp.WrapError(err)
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| 			return
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| 		}
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| 		switch msgp.UnsafeString(field) {
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| 		case "UID":
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| 			z.UID, err = dc.ReadString()
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| 			if err != nil {
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| 				err = msgp.WrapError(err, "UID")
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| 				return
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| 			}
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| 		case "Resources":
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| 			var zb0002 uint32
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| 			zb0002, err = dc.ReadArrayHeader()
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| 			if err != nil {
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| 				err = msgp.WrapError(err, "Resources")
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| 				return
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| 			}
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| 			if cap(z.Resources) >= int(zb0002) {
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| 				z.Resources = (z.Resources)[:zb0002]
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| 			} else {
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| 				z.Resources = make([]string, zb0002)
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| 			}
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| 			for za0001 := range z.Resources {
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| 				z.Resources[za0001], err = dc.ReadString()
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| 				if err != nil {
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| 					err = msgp.WrapError(err, "Resources", za0001)
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| 					return
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| 				}
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| 			}
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| 		case "Source":
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| 			z.Source, err = dc.ReadString()
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| 			if err != nil {
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| 				err = msgp.WrapError(err, "Source")
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| 				return
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| 			}
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| 		case "Owner":
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| 			z.Owner, err = dc.ReadString()
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| 			if err != nil {
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| 				err = msgp.WrapError(err, "Owner")
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| 				return
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| 			}
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| 		case "Quorum":
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| 			z.Quorum, err = dc.ReadInt()
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| 			if err != nil {
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| 				err = msgp.WrapError(err, "Quorum")
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| 				return
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| 			}
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| 		default:
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| 			err = dc.Skip()
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| 			if err != nil {
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| 				err = msgp.WrapError(err)
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| 				return
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| 			}
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| 		}
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| 	}
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| 	return
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| }
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| 
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| // EncodeMsg implements msgp.Encodable
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| func (z *LockArgs) EncodeMsg(en *msgp.Writer) (err error) {
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| 	// map header, size 5
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| 	// write "UID"
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| 	err = en.Append(0x85, 0xa3, 0x55, 0x49, 0x44)
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| 	if err != nil {
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| 		return
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| 	}
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| 	err = en.WriteString(z.UID)
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| 	if err != nil {
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| 		err = msgp.WrapError(err, "UID")
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| 		return
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| 	}
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| 	// write "Resources"
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| 	err = en.Append(0xa9, 0x52, 0x65, 0x73, 0x6f, 0x75, 0x72, 0x63, 0x65, 0x73)
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| 	if err != nil {
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| 		return
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| 	}
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| 	err = en.WriteArrayHeader(uint32(len(z.Resources)))
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| 	if err != nil {
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| 		err = msgp.WrapError(err, "Resources")
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| 		return
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| 	}
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| 	for za0001 := range z.Resources {
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| 		err = en.WriteString(z.Resources[za0001])
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| 		if err != nil {
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| 			err = msgp.WrapError(err, "Resources", za0001)
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| 			return
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| 		}
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| 	}
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| 	// write "Source"
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| 	err = en.Append(0xa6, 0x53, 0x6f, 0x75, 0x72, 0x63, 0x65)
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| 	if err != nil {
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| 		return
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| 	}
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| 	err = en.WriteString(z.Source)
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| 	if err != nil {
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| 		err = msgp.WrapError(err, "Source")
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| 		return
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| 	}
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| 	// write "Owner"
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| 	err = en.Append(0xa5, 0x4f, 0x77, 0x6e, 0x65, 0x72)
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| 	if err != nil {
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| 		return
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| 	}
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| 	err = en.WriteString(z.Owner)
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| 	if err != nil {
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| 		err = msgp.WrapError(err, "Owner")
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| 		return
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| 	}
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| 	// write "Quorum"
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| 	err = en.Append(0xa6, 0x51, 0x75, 0x6f, 0x72, 0x75, 0x6d)
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| 	if err != nil {
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| 		return
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| 	}
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| 	err = en.WriteInt(z.Quorum)
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| 	if err != nil {
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| 		err = msgp.WrapError(err, "Quorum")
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| 		return
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| 	}
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| 	return
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| }
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| 
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| // MarshalMsg implements msgp.Marshaler
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| func (z *LockArgs) MarshalMsg(b []byte) (o []byte, err error) {
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| 	o = msgp.Require(b, z.Msgsize())
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| 	// map header, size 5
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| 	// string "UID"
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| 	o = append(o, 0x85, 0xa3, 0x55, 0x49, 0x44)
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| 	o = msgp.AppendString(o, z.UID)
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| 	// string "Resources"
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| 	o = append(o, 0xa9, 0x52, 0x65, 0x73, 0x6f, 0x75, 0x72, 0x63, 0x65, 0x73)
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| 	o = msgp.AppendArrayHeader(o, uint32(len(z.Resources)))
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| 	for za0001 := range z.Resources {
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| 		o = msgp.AppendString(o, z.Resources[za0001])
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| 	}
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| 	// string "Source"
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| 	o = append(o, 0xa6, 0x53, 0x6f, 0x75, 0x72, 0x63, 0x65)
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| 	o = msgp.AppendString(o, z.Source)
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| 	// string "Owner"
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| 	o = append(o, 0xa5, 0x4f, 0x77, 0x6e, 0x65, 0x72)
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| 	o = msgp.AppendString(o, z.Owner)
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| 	// string "Quorum"
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| 	o = append(o, 0xa6, 0x51, 0x75, 0x6f, 0x72, 0x75, 0x6d)
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| 	o = msgp.AppendInt(o, z.Quorum)
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| 	return
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| }
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| 
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| // UnmarshalMsg implements msgp.Unmarshaler
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| func (z *LockArgs) UnmarshalMsg(bts []byte) (o []byte, err error) {
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| 	var field []byte
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| 	_ = field
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| 	var zb0001 uint32
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| 	zb0001, bts, err = msgp.ReadMapHeaderBytes(bts)
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| 	if err != nil {
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| 		err = msgp.WrapError(err)
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| 		return
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| 	}
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| 	for zb0001 > 0 {
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| 		zb0001--
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| 		field, bts, err = msgp.ReadMapKeyZC(bts)
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| 		if err != nil {
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| 			err = msgp.WrapError(err)
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| 			return
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| 		}
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| 		switch msgp.UnsafeString(field) {
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| 		case "UID":
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| 			z.UID, bts, err = msgp.ReadStringBytes(bts)
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| 			if err != nil {
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| 				err = msgp.WrapError(err, "UID")
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| 				return
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| 			}
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| 		case "Resources":
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| 			var zb0002 uint32
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| 			zb0002, bts, err = msgp.ReadArrayHeaderBytes(bts)
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| 			if err != nil {
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| 				err = msgp.WrapError(err, "Resources")
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| 				return
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| 			}
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| 			if cap(z.Resources) >= int(zb0002) {
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| 				z.Resources = (z.Resources)[:zb0002]
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| 			} else {
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| 				z.Resources = make([]string, zb0002)
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| 			}
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| 			for za0001 := range z.Resources {
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| 				z.Resources[za0001], bts, err = msgp.ReadStringBytes(bts)
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| 				if err != nil {
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| 					err = msgp.WrapError(err, "Resources", za0001)
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| 					return
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| 				}
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| 			}
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| 		case "Source":
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| 			z.Source, bts, err = msgp.ReadStringBytes(bts)
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| 			if err != nil {
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| 				err = msgp.WrapError(err, "Source")
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| 				return
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| 			}
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| 		case "Owner":
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| 			z.Owner, bts, err = msgp.ReadStringBytes(bts)
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| 			if err != nil {
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| 				err = msgp.WrapError(err, "Owner")
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| 				return
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| 			}
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| 		case "Quorum":
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| 			z.Quorum, bts, err = msgp.ReadIntBytes(bts)
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| 			if err != nil {
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| 				err = msgp.WrapError(err, "Quorum")
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| 				return
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| 			}
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| 		default:
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| 			bts, err = msgp.Skip(bts)
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| 			if err != nil {
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| 				err = msgp.WrapError(err)
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| 				return
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| 			}
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| 		}
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| 	}
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| 	o = bts
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| 	return
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| }
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| 
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| // Msgsize returns an upper bound estimate of the number of bytes occupied by the serialized message
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| func (z *LockArgs) Msgsize() (s int) {
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| 	s = 1 + 4 + msgp.StringPrefixSize + len(z.UID) + 10 + msgp.ArrayHeaderSize
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| 	for za0001 := range z.Resources {
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| 		s += msgp.StringPrefixSize + len(z.Resources[za0001])
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| 	}
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| 	s += 7 + msgp.StringPrefixSize + len(z.Source) + 6 + msgp.StringPrefixSize + len(z.Owner) + 7 + msgp.IntSize
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| 	return
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| }
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