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Reduce Merkle tree footprint by lazily converting to Paths#28737

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fmeum wants to merge 1 commit intobazelbuild:masterfrom
fmeum:optimize-merkle-tree-size-2
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Reduce Merkle tree footprint by lazily converting to Paths#28737
fmeum wants to merge 1 commit intobazelbuild:masterfrom
fmeum:optimize-merkle-tree-size-2

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@fmeum fmeum commented Feb 21, 2026

Description

Paths of ActionInputs are typically not retained, which means that keeping them in memory as part of a Merkle tree is wasteful. Instead, retain the inputs and lazily convert to Path when uploading using the ArtifactPathResolver anyway retained by SpawnExecutionContext.

Motivation

Work towards #20478
Work towards #28734

Build API Changes

No

Checklist

  • I have added tests for the new use cases (if any).
  • I have updated the documentation (if applicable).

Release Notes

RELNOTES: None

@fmeum fmeum force-pushed the optimize-merkle-tree-size-2 branch 5 times, most recently from 5f2c6d5 to 798d3ab Compare February 26, 2026 11:04
@fmeum fmeum marked this pull request as ready for review February 26, 2026 11:05
@fmeum fmeum requested a review from a team as a code owner February 26, 2026 11:05
@fmeum fmeum requested a review from tjgq February 26, 2026 11:05
@github-actions github-actions bot added team-Remote-Exec Issues and PRs for the Execution (Remote) team awaiting-review PR is awaiting review from an assigned reviewer labels Feb 26, 2026
@fmeum fmeum force-pushed the optimize-merkle-tree-size-2 branch from 798d3ab to 7238f9e Compare February 26, 2026 11:05
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fmeum commented Feb 26, 2026

@bazel-io fork 9.1.0

@tjgq tjgq added awaiting-PR-merge PR has been approved by a reviewer and is ready to be merge internally and removed awaiting-review PR is awaiting review from an assigned reviewer labels Feb 26, 2026
@github-actions github-actions bot removed the awaiting-PR-merge PR has been approved by a reviewer and is ready to be merge internally label Feb 27, 2026
iancha1992 pushed a commit to iancha1992/bazel that referenced this pull request Feb 27, 2026
…ild#28737)

`Path`s of `ActionInput`s are typically not retained, which means that keeping them in memory as part of a Merkle tree is wasteful. Instead, retain the inputs and lazily convert to `Path` when uploading using the `ArtifactPathResolver` anyway retained by `SpawnExecutionContext`.

Work towards bazelbuild#20478
Work towards bazelbuild#28734

No

- [ ] I have added tests for the new use cases (if any).
- [ ] I have updated the documentation (if applicable).

RELNOTES: None

Closes bazelbuild#28737.

PiperOrigin-RevId: 876039610
Change-Id: Id4af6af2daf7ef72e8a8e3da35f00e2dccd81bd0
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