zstd

Documentation

Overview

Package zstd implements the ZSTD parquet compression codec.

Index

• Constants
• type Codec
  • func (c *Codec) CompressionCodec() format.CompressionCodec
  • func (c *Codec) Decode(dst, src []byte) ([]byte, error)
  • func (c *Codec) Encode(dst, src []byte) ([]byte, error)
  • func (c *Codec) String() string
• type Level

Constants

const (
	// SpeedFastest will choose the fastest reasonable compression.
	// This is roughly equivalent to the fastest Zstandard mode.
	SpeedFastest = zstd.SpeedFastest

	// SpeedDefault is the default "pretty fast" compression option.
	// This is roughly equivalent to the default Zstandard mode (level 3).
	SpeedDefault = zstd.SpeedDefault

	// SpeedBetterCompression will yield better compression than the default.
	// Currently it is about zstd level 7-8 with ~ 2x-3x the default CPU usage.
	// By using this, notice that CPU usage may go up in the future.
	SpeedBetterCompression = zstd.SpeedBetterCompression

	// SpeedBestCompression will choose the best available compression option.
	// This will offer the best compression no matter the CPU cost.
	SpeedBestCompression = zstd.SpeedBestCompression
)

const (
	DefaultLevel = SpeedDefault
)

Types

type Codec

type Codec struct {
	Level Level
	// contains filtered or unexported fields
}

func (*Codec) CompressionCodec

func (c *Codec) CompressionCodec() format.CompressionCodec

func (*Codec) Decode

func (c *Codec) Decode(dst, src []byte) ([]byte, error)

func (*Codec) Encode

func (c *Codec) Encode(dst, src []byte) ([]byte, error)

func (*Codec) String

func (c *Codec) String() string

type Level

type Level = zstd.EncoderLevel