Greg Hogan created FLINK-2882: --------------------------------- Summary: Improve performance of string conversions Key: FLINK-2882 URL: https://issues.apache.org/jira/browse/FLINK-2882 Project: Flink Issue Type: Improvement Components: Core Affects Versions: 0.10 Reporter: Greg Hogan Assignee: Greg Hogan
{{AbstractID.toString()}} and {{AbstractID.toShortString()}} call {{StringUtils.byteToHexString(...)}} which uses a StringBuilder to convert from binary to hex. This is a hotspot when scaling the number of workers. While testing on my single node with parallelism=512 jvisualvm reports 600,000 calls taking 13.4 seconds. Improving {{StringUtils.byteToHexString(...)}} reduces the time to 1.3 seconds. Additionally memoizing the string values in {{AbstractID}} reduce the time to 350 ms and the number of calls to {{StringUtils.byteToHexString(...)}} to ~1000. -- This message was sent by Atlassian JIRA (v6.3.4#6332)