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Merge pull request #4820 from nairb774/master

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[Go] encode.go performance changes
This commit is contained in:
Robert
2018-07-26 15:35:45 -07:00
committed by GitHub
parent 2361dfb66a b3e4d9169b
commit 1bb2a3bd08
1 changed files with 28 additions and 6 deletions
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34
go/encode.go
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@@ -36,6 +36,7 @@ func GetUint8(buf []byte) (n uint8) {
// GetUint16 decodes a little-endian uint16 from a byte slice.
func GetUint16(buf []byte) (n uint16) {
_ = buf[1] // Force one bounds check. See: golang.org/issue/14808
n |= uint16(buf[0])
n |= uint16(buf[1]) << 8
return
@@ -43,6 +44,7 @@ func GetUint16(buf []byte) (n uint16) {
// GetUint32 decodes a little-endian uint32 from a byte slice.
func GetUint32(buf []byte) (n uint32) {
_ = buf[3] // Force one bounds check. See: golang.org/issue/14808
n |= uint32(buf[0])
n |= uint32(buf[1]) << 8
n |= uint32(buf[2]) << 16
@@ -52,6 +54,7 @@ func GetUint32(buf []byte) (n uint32) {
// GetUint64 decodes a little-endian uint64 from a byte slice.
func GetUint64(buf []byte) (n uint64) {
_ = buf[7] // Force one bounds check. See: golang.org/issue/14808
n |= uint64(buf[0])
n |= uint64(buf[1]) << 8
n |= uint64(buf[2]) << 16
@@ -71,6 +74,7 @@ func GetInt8(buf []byte) (n int8) {
// GetInt16 decodes a little-endian int16 from a byte slice.
func GetInt16(buf []byte) (n int16) {
_ = buf[1] // Force one bounds check. See: golang.org/issue/14808
n |= int16(buf[0])
n |= int16(buf[1]) << 8
return
@@ -78,6 +82,7 @@ func GetInt16(buf []byte) (n int16) {
// GetInt32 decodes a little-endian int32 from a byte slice.
func GetInt32(buf []byte) (n int32) {
_ = buf[3] // Force one bounds check. See: golang.org/issue/14808
n |= int32(buf[0])
n |= int32(buf[1]) << 8
n |= int32(buf[2]) << 16
@@ -87,6 +92,7 @@ func GetInt32(buf []byte) (n int32) {
// GetInt64 decodes a little-endian int64 from a byte slice.
func GetInt64(buf []byte) (n int64) {
_ = buf[7] // Force one bounds check. See: golang.org/issue/14808
n |= int64(buf[0])
n |= int64(buf[1]) << 8
n |= int64(buf[2]) << 16
@@ -145,12 +151,14 @@ func WriteUint8(buf []byte, n uint8) {
// WriteUint16 encodes a little-endian uint16 into a byte slice.
func WriteUint16(buf []byte, n uint16) {
_ = buf[1] // Force one bounds check. See: golang.org/issue/14808
buf[0] = byte(n)
buf[1] = byte(n >> 8)
}
// WriteUint32 encodes a little-endian uint32 into a byte slice.
func WriteUint32(buf []byte, n uint32) {
_ = buf[3] // Force one bounds check. See: golang.org/issue/14808
buf[0] = byte(n)
buf[1] = byte(n >> 8)
buf[2] = byte(n >> 16)
@@ -159,9 +167,15 @@ func WriteUint32(buf []byte, n uint32) {
// WriteUint64 encodes a little-endian uint64 into a byte slice.
func WriteUint64(buf []byte, n uint64) {
for i := uint(0); i < uint(SizeUint64); i++ {
buf[i] = byte(n >> (i * 8))
}
_ = buf[7] // Force one bounds check. See: golang.org/issue/14808
buf[0] = byte(n)
buf[1] = byte(n >> 8)
buf[2] = byte(n >> 16)
buf[3] = byte(n >> 24)
buf[4] = byte(n >> 32)
buf[5] = byte(n >> 40)
buf[6] = byte(n >> 48)
buf[7] = byte(n >> 56)
}
// WriteInt8 encodes a little-endian int8 into a byte slice.
@@ -171,12 +185,14 @@ func WriteInt8(buf []byte, n int8) {
// WriteInt16 encodes a little-endian int16 into a byte slice.
func WriteInt16(buf []byte, n int16) {
_ = buf[1] // Force one bounds check. See: golang.org/issue/14808
buf[0] = byte(n)
buf[1] = byte(n >> 8)
}
// WriteInt32 encodes a little-endian int32 into a byte slice.
func WriteInt32(buf []byte, n int32) {
_ = buf[3] // Force one bounds check. See: golang.org/issue/14808
buf[0] = byte(n)
buf[1] = byte(n >> 8)
buf[2] = byte(n >> 16)
@@ -185,9 +201,15 @@ func WriteInt32(buf []byte, n int32) {
// WriteInt64 encodes a little-endian int64 into a byte slice.
func WriteInt64(buf []byte, n int64) {
for i := uint(0); i < uint(SizeInt64); i++ {
buf[i] = byte(n >> (i * 8))
}
_ = buf[7] // Force one bounds check. See: golang.org/issue/14808
buf[0] = byte(n)
buf[1] = byte(n >> 8)
buf[2] = byte(n >> 16)
buf[3] = byte(n >> 24)
buf[4] = byte(n >> 32)
buf[5] = byte(n >> 40)
buf[6] = byte(n >> 48)
buf[7] = byte(n >> 56)
}
// WriteFloat32 encodes a little-endian float32 into a byte slice.