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Implement lazy loading for Commit.tree property#5

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ibrahimcetin merged 5 commits into
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lazy-tree
Nov 25, 2025
Merged

Implement lazy loading for Commit.tree property#5
ibrahimcetin merged 5 commits into
mainfrom
lazy-tree

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@ibrahimcetin

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Implement lazy loading for Commit.tree property

Converts Commit.tree to a lazily-loaded computed property, significantly reducing memory usage when working with commit history.

Performance Impact

  • 50% RAM reduction when loading full commit history (tested on Swift source code repo: 1.8GB → 0.9GB)
  • Tree is only fetched when accessed, improving performance for operations that don't need tree data

Breaking Change

  • Commit.tree is now a throwing computed property
  • Cache in a local variable if accessing multiple times

…documentation for clarity on its usage and performance considerations.
… for tree property, ensuring consistent access to commit tree data.

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Pull request overview

This PR implements lazy loading for the Commit.tree property to achieve significant memory reduction (50% in large repositories) by deferring tree fetching until explicitly accessed. The implementation converts tree from a stored property to a throwing computed property.

Key Changes:

  • Converted Commit.tree to a lazily-loaded throwing computed property that fetches the tree on-demand
  • Removed tree initialization from Commit.init(pointer:) to avoid eager loading
  • Removed tree comparison from Commit's Equatable implementation (breaking change in equality semantics)

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File Description
Sources/SwiftGitX/Objects/Commit.swift Core implementation: replaces stored tree property with lazy-loaded computed property; removes tree from initialization and equality comparison
Tests/SwiftGitXTests/RepositoryTests/RepositoryShowTests.swift Updates test to use try commit.tree for the new throwing property
Tests/SwiftGitXTests/CollectionTests/TagCollectionTests.swift Updates two tests to use try commit.tree and extracts tree to local variable where needed multiple times

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Comment thread Sources/SwiftGitX/Objects/Commit.swift
Comment thread Sources/SwiftGitX/Objects/Commit.swift

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Copilot encountered an error and was unable to review this pull request. You can try again by re-requesting a review.

…improving performance and clarity in tree access.

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Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.


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Comment thread Sources/SwiftGitX/Objects/Commit.swift Outdated
Comment thread Sources/SwiftGitX/Objects/Commit.swift
ibrahimcetin and others added 2 commits November 25, 2025 23:36
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
@ibrahimcetin ibrahimcetin merged commit 02af190 into main Nov 25, 2025
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@ibrahimcetin ibrahimcetin deleted the lazy-tree branch November 25, 2025 20:38
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2 participants