[DDC-2166] Improve Identifier hashing in IdentiyMap Created: 25/Nov/12  Updated: 25/Nov/12

Status: Open
Project: Doctrine 2 - ORM
Component/s: None
Affects Version/s: None
Fix Version/s: None
Security Level: All

Type: Improvement Priority: Major
Reporter: Benjamin Eberlei Assignee: Benjamin Eberlei
Resolution: Unresolved Votes: 0
Labels: None


There are currently some drawbacks with identifier hashing:

  • They only work on one level for derived keys
  • The code is suspect to high performance requirements
  • Composite Keys might be suspect to weird bugs if they contain spaces.

There is a PR by goetas (https://github.com/doctrine/doctrine2/pull/232) that solves some issues, however adds a performance hit.

We should move the conditional logic of this code out and use a strategy pattern to improve both performance and robustness of this code.

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