[HDFS-13601] Optimize ByteString conversions in PBHelper

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.1.0, 2.9.1
• Fix Version/s: 2.10.0, 3.2.0, 3.1.1, 3.0.3
• Assignee: Andrew Wang
• Reporter: Andrew Wang
• Created: 21/May/18 23:30
• Updated: 23/May/18 07:21
• Resolved: 23/May/18 07:02

Description

While doing some profiling of the NN with JMC, I saw a lot of time being spent on String->ByteString conversions. These are often the same strings being converted over and over again, meaning there's room for optimization.