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Configure zstd encoder/decoder

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This commit is contained in:
Alexander Neumann 2022-04-20 20:46:11 +02:00 committed by Michael Eischer
parent 2f36e044db
commit 5eb05a0afe
1 changed files with 21 additions and 2 deletions
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23
internal/repository/repository.go
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@ -329,7 +329,18 @@ func (r *Repository) getZstdEncoder() *zstd.Encoder {
level = zstd.SpeedBestCompression
}
enc, err := zstd.NewWriter(nil, zstd.WithEncoderLevel(level))
opts := []zstd.EOption{
// Set the compression level configured.
zstd.WithEncoderLevel(level),
// Disable CRC, we have enough checks in place, makes the
// compressed data four bytes shorter.
zstd.WithEncoderCRC(false),
// Set a window of 512kbyte, so we have good lookbehind for usual
// blob sizes.
zstd.WithWindowSize(512 * 1024),
}
enc, err := zstd.NewWriter(nil, opts...)
if err != nil {
panic(err)
}
@ -340,7 +351,15 @@ func (r *Repository) getZstdEncoder() *zstd.Encoder {
func (r *Repository) getZstdDecoder() *zstd.Decoder {
r.allocDec.Do(func() {
dec, err := zstd.NewReader(nil)
opts := []zstd.DOption{
// Use all available cores.
zstd.WithDecoderConcurrency(0),
// Limit the maximum decompressed memory. Set to a very high,
// conservative value.
zstd.WithDecoderMaxMemory(16 * 1024 * 1024 * 1024),
}
dec, err := zstd.NewReader(nil, opts...)
if err != nil {
panic(err)
}