DDC-2166: Improve Identifier hashing in IdentiyMap #2725

New Issue

Open

opened 2026-01-22 14:01:43 +01:00 by admin · 0 comments

admin commented 2026-01-22 14:01:43 +01:00

Owner

Copy Link

Originally created by @doctrinebot on GitHub (Nov 25, 2012).

Originally assigned to: @beberlei on GitHub.

Jira issue originally created by user @beberlei:

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.

Originally created by @doctrinebot on GitHub (Nov 25, 2012). Originally assigned to: @beberlei on GitHub. Jira issue originally created by user @beberlei: 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.

admin added the Improvement label 2026-01-22 14:01:43 +01:00

Sign in to join this conversation.

No Branch/Tag Specified

Branches Tags

3.6.x

2.20.x

dependabot/github_actions/2.20.x/doctrine/dot-github/dot-github/workflows/composer-lint.yml-14.0.0

3.7.x

4.0.x

2.21.x

old-prototype-3.x

3.6.2

3.6.1

3.6.0

2.20.9

3.5.8

3.5.7

3.5.6

3.5.5

2.20.8

3.5.4

3.5.3

2.20.7

3.5.2

2.20.6

3.5.1

3.5.0

3.4.4

3.4.3

3.4.2

2.20.5

3.4.1

3.4.0

3.3.4

2.20.4

3.3.3

2.20.3

3.3.2

2.20.2

3.3.1

2.20.1

3.3.0

3.2.3

2.20.0

2.19.8

3.2.2

2.19.7

3.2.1

2.19.6

3.2.0

3.1.4

3.1.3

2.19.5

3.1.2

2.19.4

3.1.1

2.19.3

2.19.2

2.19.1

3.1.0

2.19.0

3.0.3

2.18.3

3.0.2

2.18.2

3.0.1

2.18.1

3.0.0

2.18.0

2.17.5

3.0.0-RC1

2.17.4

2.17.3

2.17.2

2.17.1

3.0.0-beta2

2.17.0

2.16.3

3.0.0-beta1

2.16.2

2.16.1

2.16.0

2.15.5

2.15.4

2.15.3

2.15.2

2.15.1

2.15.0

2.14.3

2.14.2

2.14.1

2.14.0

2.13.5

2.13.4

2.13.3

2.13.2

2.13.1

2.13.0

2.12.4

2.12.3

2.12.2

2.12.1

2.12.0

2.11.3

2.11.2

2.11.1

2.11.0

2.10.5

2.10.4

2.10.3

2.10.2

2.10.1

2.10.0

2.9.6

2.9.5

2.9.4

2.9.3

2.9.2

2.9.1

2.9.0

2.8.5

2.8.4

2.8.3

2.8.2

2.8.1

2.8.0

2.7.5

2.7.4

v2.7.3

v2.7.2

v2.7.1

v2.7.0

v2.6.6

v2.6.5

v2.6.4

v2.6.3

v2.6.2

v2.6.1

v2.6.0

v2.5.14

v2.5.13

v2.5.12

v2.5.11

v2.5.10

v2.5.9

v2.5.8

v2.5.7

v2.5.6

v2.5.5

v2.5.4

v2.5.3

v2.5.2

v2.4.8

v2.5.1

v2.5.0

v2.5.0-RC2

v2.5.0-RC1

v2.5.0-beta1

v2.5.0-alpha2

v2.5.0-alpha1

v2.4.7

v2.4.6

v2.4.5

v2.4.4

v2.4.3

v2.3.6

v2.4.2

2.3.5

v2.4.1

v2.4.0

2.4.0-RC2

2.4.0-RC1

2.4.0-BETA2

2.3.4

2.3.3

2.4.0-BETA1

2.3.2

2.3.1

2.3.0

2.3.0-RC4

2.3.0-RC3

2.3.0-RC2

2.2.3

2.3.0-RC1

2.3.0-BETA1

2.1.7

2.2.2

2.2.1

2.1.6

2.2.0

2.2.0-RC1

2.2.0-BETA2

2.2.0-BETA1

2.1.5

2.1.4

2.1.3

2.1.2

2.1.1

2.0.7

2.1.0

2.1.0RC3

2.1.0RC2

2.1.0RC1

2.0.6

2.1.0BETA1

2.0.5

2.0.4

2.0.3

2.0.2

2.0.1

2.0.0

2.0.0RC2

2.0.0RC1

2.0.0-BETA4

2.0.0-BETA3

2.0.0-BETA2

2.0.0-BETA1

Labels

Clear labels

BC Break

Bug

Can't Fix

Deprecation

Documentation

DQL

Duplicate

Failing Test

Hacktoberfest

Improvement

Improvement

Incomplete

Invalid

Missing Tests

New Feature

PR Created

pull-request

Mirrored from GitHub Pull Request

Question

Regression

Status: Waiting feedback

Waiting feedback

WIP

Won't Fix

No Label Improvement

Milestone

No items

No Milestone

Projects

Clear projects

No project

Assignees

Clear assignees

admin

No Assignees

1 Participants

Notifications

Subscribe

Due Date

No due date set.

Dependencies

No dependencies set.

Reference: doctrine/archived-orm#2725