[hibernate-issues] [Hibernate-JIRA] Created: (HHH-3922) [Memory] Hibernate should use less empty sets and/or collections and intern strings

[Memory] Hibernate should use less empty sets and/or collections and intern strings ----------------------------------------------------------------------------------- Key: HHH-3922 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3922 Project: Hibernate Core Issue Type: Improvement Components: core Reporter: Sergey Vladimirov Priority: Minor Hibernate uses many empty hashsets and collections initialized with default sizes (16). java.util.HashMap Length # Objects Shallow Heap Retained Heap 0 - 17 116 - 684 640 >= 1 853 608 <!-- emtpy sets without objects, most of them - from Hibernate 1 - 2 214 - 88 560 >= 423 240 2 - 1 140 - 45 600 >= 317 696 5 - 873 - 34 920 >= 383 632 3 - 489 - 19 560 >= 988 112 4 - 374 - 14 960 >= 206 560 Empty or not good filled sets examples: HqlSqlWalker: querySpaces; FromClause: fromElements; As well some strings should be interned to reuse strings pool memory: antlr.CommonAST: text -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://opensource.atlassian.com/projects/hibernate/secure/Administrators.... - For more information on JIRA, see: http://www.atlassian.com/software/jira