[PARQUET-1924] Do not Instantiate a New LongHashFunction

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 1.12.0
• Assignee: David Mollitor
• Reporter: David Mollitor
• Created: 13/Oct/20 15:48
• Updated: 21/Oct/20 20:13
• Resolved: 21/Oct/20 20:13

Description

XxHash.java

/**
 * The implementation of HashFunction interface. The XxHash uses XXH64 version xxHash
 * with a seed of 0.
 */
public class XxHash implements HashFunction {
  @Override
  public long hashBytes(byte[] input) {
    return LongHashFunction.xx(0).hashBytes(input);
  }

  @Override
  public long hashByteBuffer(ByteBuffer input) {
    return LongHashFunction.xx(0).hashBytes(input);
  }

Since the seed is always zero, the static implementation provided by the library can be used here.