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Add FlateDefault option and improve zstd allocs

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This commit is contained in:
Nicolás Pazos 2023-11-03 12:00:59 -03:00 committed by Callum Styan
parent 7740f35338
commit c62a862aa6
1 changed files with 20 additions and 16 deletions
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36
storage/remote/compression.go
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@ -35,6 +35,7 @@ const (
ZstdBestComp
Lzw
FlateFast
FlateDefault
FlateComp
BrotliFast
BrotliComp
@ -76,6 +77,8 @@ var createComp func() Compression = func() Compression {
return &flateCompression{level: flate.BestSpeed}
case FlateComp:
return &flateCompression{level: flate.BestCompression}
case FlateDefault:
return &flateCompression{level: flate.DefaultCompression}
case BrotliFast:
return &brotliCompression{quality: brotli.BestSpeed}
case BrotliDefault:
@ -162,7 +165,7 @@ func (s *s2Compression) Decompress(data []byte) ([]byte, error) {
type zstdCompression struct {
level zstd.EncoderLevel
buf []byte
buf bytes.Buffer
r *reZstd.Decoder
w *reZstd.Encoder
}
@ -175,14 +178,18 @@ func (z *zstdCompression) Compress(data []byte) ([]byte, error) {
return nil, err
}
}
z.w.Reset(nil)
z.buf = z.buf[:0]
res := z.w.EncodeAll(data, z.buf)
if len(res) > cap(z.buf) {
z.buf = res
z.buf.Reset()
z.w.Reset(&z.buf)
_, err = z.w.Write(data)
if err != nil {
return nil, err
}
return res, nil
err = z.w.Close()
if err != nil {
return nil, err
}
return z.buf.Bytes(), nil
}
func (z *zstdCompression) Decompress(data []byte) ([]byte, error) {
@ -193,20 +200,17 @@ func (z *zstdCompression) Decompress(data []byte) ([]byte, error) {
return nil, err
}
}
err = z.r.Reset(nil)
if err != nil {
return nil, err
}
z.buf = z.buf[:0]
buf, err := z.r.DecodeAll(data, z.buf)
err = z.r.Reset(bytes.NewReader(data))
if err != nil {
return nil, err
}
if len(buf) > cap(z.buf) {
z.buf = buf
z.buf.Reset()
_, err = io.Copy(&z.buf, z.r)
if err != nil {
return nil, err
}
return buf, nil
return z.buf.Bytes(), nil
}
type lzwCompression struct {