JDK-8046201 : Avoid repeated flattening of nested ConsStrings
- Type: Enhancement
- Component: core-libs
- Priority: P4
- Status: Resolved
- Resolution: Fixed
- OS: generic
- CPU: generic
- Submitted: 2014-06-06
- Updated: 2015-01-21
- Resolved: 2014-06-23
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| JDK 8 | JDK 9 |
|---|---|
8u40Fixed  |
9 b22Fixed |
Description
Currently, when a ConsString is flattened to a java.lang.String, only the top level string is generated and cached (for obvious reasons). However, if a ConsString is repeatedly concatenated with another string and then flattened we may want to generate and cache the java.lang.String representation of that partial ConsString.
A typical use case is the following piece of code where `data` may be a constant, long ConsString.
String(header + CRLF + data);