JDK-8189319 : Add a java.util.Properties constructor that takes an initial capacity
  • Type: Enhancement
  • Component: core-libs
  • Sub-Component: java.util
  • Priority: P3
  • Status: Resolved
  • Resolution: Fixed
  • Submitted: 2017-10-13
  • Updated: 2017-12-01
  • Resolved: 2017-10-30
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JDK 10
10 b30Fixed
Related Reports
CSR :  
JDK-8189407 - Add a java.util.Properties constructor that takes an initial capacity
Relates :  
JDK-8185496 - Improve performance of system properties initialization in initPhase1
Description
It would be useful to have a Properties constructor that took an argument to set the initial capacity.  Such a constructor is present on many of the other Map implementations in the JDK, including Hashtable, the superclass of Properties.
Comments
In particular, being able to specify the initial capacity of the Properties created to store the system properties could reduce startup time. The current initial capacity of 8 is insufficient, and we waste time at startup resizing to the needed size, when instead we should create a Properties with a sufficient initial capacity.
13-10-2017