Run same-depth projects concurrently by j178 · Pull Request #2110 · j178/prek

j178 · 2026-05-20T10:02:04Z

Closes #673

codecov · 2026-05-20T10:05:03Z

Codecov Report

❌ Patch coverage is 88.16121% with 94 lines in your changes missing coverage. Please review.
✅ Project coverage is 92.16%. Comparing base (1b811a7) to head (c29887d).
⚠️ Report is 7 commits behind head on master.

Files with missing lines	Patch %	Lines
crates/prek/src/cli/reporter.rs	75.00%	79 Missing ⚠️
crates/prek/src/cli/run/run.rs	97.28%	10 Missing ⚠️
crates/prek/src/cli/run/filter.rs	94.91%	3 Missing ⚠️
crates/prek/src/hook.rs	50.00%	1 Missing ⚠️
...ates/prek/src/hooks/pre_commit_hooks/check_yaml.rs	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2110      +/-   ##
==========================================
- Coverage   92.36%   92.16%   -0.21%     
==========================================
  Files         121      121              
  Lines       24847    25358     +511     
==========================================
+ Hits        22951    23372     +421     
- Misses       1896     1986      +90

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prek-ci-bot · 2026-05-20T10:12:04Z

📦 Cargo Bloat Comparison

Binary size change: -0.38% (26.3 MiB → 26.2 MiB)

Expand for cargo-bloat output

Head Branch Results

 File  .text     Size             Crate Name
 1.2%   2.6% 332.0KiB        aws_lc_sys aws_lc_0_41_0_aes_gcm_encrypt_avx512
 1.2%   2.6% 332.0KiB        aws_lc_sys aws_lc_0_41_0_aes_gcm_decrypt_avx512
 0.3%   0.7%  89.8KiB              prek prek::languages::<impl prek::config::Language>::run::{{closure}}::{{closure}}
 0.3%   0.6%  81.1KiB              prek prek::languages::<impl prek::config::Language>::run::{{closure}}::{{closure}}
 0.3%   0.5%  69.8KiB              prek prek::languages::<impl prek::config::Language>::install::{{closure}}
 0.2%   0.5%  60.7KiB             prek? <prek::cli::Command as clap_builder::derive::Subcommand>::augment_subcommands
 0.2%   0.4%  51.3KiB annotate_snippets annotate_snippets::renderer::render::render
 0.2%   0.4%  48.2KiB              prek prek::run::{{closure}}
 0.2%   0.3%  42.2KiB              prek prek::cli::run::run::run::{{closure}}
 0.1%   0.3%  33.1KiB             prek? <prek::cli::RunArgs as clap_builder::derive::Args>::augment_args
 0.1%   0.2%  30.6KiB             prek? <prek::config::_::<impl serde_core::de::Deserialize for prek::config::Config>::deserialize::__Visitor as serde_core::de::Visitor>::visit_map
 0.1%   0.2%  29.6KiB               std core::ptr::drop_in_place<prek::languages::<impl prek::config::Language>::install::{{closure}}>
 0.1%   0.2%  28.1KiB      serde_saphyr granit_parser::scanner::Scanner<T>::fetch_more_tokens
 0.1%   0.2%  28.0KiB        aws_lc_sys aws_lc_0_41_0_edwards25519_scalarmuldouble_alt
 0.1%   0.2%  27.5KiB        aws_lc_sys aws_lc_0_41_0_edwards25519_scalarmuldouble
 0.1%   0.2%  26.0KiB              prek prek::cli::try_repo::try_repo::{{closure}}
 0.1%   0.2%  23.9KiB              prek prek::hooks::meta_hooks::MetaHooks::run::{{closure}}
 0.1%   0.2%  23.0KiB      serde_saphyr granit_parser::scanner::Scanner<T>::fetch_more_tokens
 0.1%   0.2%  22.3KiB         [Unknown] Lp384_montjscalarmul_alt_p384_montjadd
 0.1%   0.2%  21.5KiB      clap_builder clap_builder::parser::parser::Parser::get_matches_with
41.6%  86.3%  10.9MiB                   And 23984 smaller methods. Use -n N to show more.
48.2% 100.0%  12.6MiB                   .text section size, the file size is 26.2MiB

Base Branch Results

 File  .text     Size             Crate Name
 1.2%   2.5% 332.0KiB        aws_lc_sys aws_lc_0_41_0_aes_gcm_encrypt_avx512
 1.2%   2.5% 332.0KiB        aws_lc_sys aws_lc_0_41_0_aes_gcm_decrypt_avx512
 0.3%   0.7%  90.8KiB              prek prek::languages::<impl prek::config::Language>::run::{{closure}}::{{closure}}
 0.3%   0.7%  86.3KiB              prek prek::languages::<impl prek::config::Language>::run::{{closure}}::{{closure}}
 0.3%   0.5%  70.0KiB              prek prek::languages::<impl prek::config::Language>::install::{{closure}}
 0.2%   0.5%  61.1KiB             prek? <prek::cli::Command as clap_builder::derive::Subcommand>::augment_subcommands
 0.2%   0.4%  51.3KiB annotate_snippets annotate_snippets::renderer::render::render
 0.2%   0.4%  46.9KiB              prek prek::cli::run::run::run::{{closure}}
 0.1%   0.3%  36.0KiB              prek prek::run::{{closure}}
 0.1%   0.3%  33.3KiB             prek? <prek::cli::RunArgs as clap_builder::derive::Args>::augment_args
 0.1%   0.2%  30.4KiB             prek? <prek::config::_::<impl serde_core::de::Deserialize for prek::config::Config>::deserialize::__Visitor as serde_core::de::Visitor>::visit_map
 0.1%   0.2%  30.2KiB               std core::ptr::drop_in_place<prek::languages::<impl prek::config::Language>::install::{{closure}}>
 0.1%   0.2%  28.1KiB      serde_saphyr granit_parser::scanner::Scanner<T>::fetch_more_tokens
 0.1%   0.2%  28.0KiB        aws_lc_sys aws_lc_0_41_0_edwards25519_scalarmuldouble_alt
 0.1%   0.2%  27.5KiB        aws_lc_sys aws_lc_0_41_0_edwards25519_scalarmuldouble
 0.1%   0.2%  26.5KiB              prek prek::cli::try_repo::try_repo::{{closure}}
 0.1%   0.2%  24.0KiB              prek prek::hooks::meta_hooks::MetaHooks::run::{{closure}}
 0.1%   0.2%  23.0KiB      serde_saphyr granit_parser::scanner::Scanner<T>::fetch_more_tokens
 0.1%   0.2%  22.3KiB         [Unknown] Lp384_montjscalarmul_alt_p384_montjadd
 0.1%   0.2%  21.5KiB      clap_builder clap_builder::parser::parser::Parser::get_matches_with
41.8%  86.4%  11.0MiB                   And 24028 smaller methods. Use -n N to show more.
48.4% 100.0%  12.7MiB                   .text section size, the file size is 26.3MiB

prek-ci-bot · 2026-05-20T10:12:05Z

⚡️ Hyperfine Benchmarks

Summary: 1 regressions, 2 improvements above the 10% threshold.

Environment

OS: Linux 6.17.0-1013-azure
CPU: 4 cores
prek version: prek 0.4.1+21 (7f64792 2026-05-25)
Rust version: rustc 1.95.0 (59807616e 2026-04-14)
Hyperfine version: hyperfine 1.20.0

CLI Commands

Benchmarking basic commands in the main repo:

`prek --version`

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
`prek-base --version`	2.4 ± 0.1	2.2	2.6	1.01 ± 0.05
`prek-head --version`	2.4 ± 0.1	2.2	2.6	1.00

`prek list`

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
`prek-base list`	9.7 ± 0.4	9.0	10.9	1.04 ± 0.05
`prek-head list`	9.3 ± 0.2	9.0	9.9	1.00

`prek validate-config .pre-commit-config.yaml`

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
`prek-base validate-config .pre-commit-config.yaml`	3.2 ± 0.0	3.1	3.3	1.01 ± 0.02
`prek-head validate-config .pre-commit-config.yaml`	3.2 ± 0.1	3.1	3.4	1.00

`prek sample-config`

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
`prek-base sample-config`	2.7 ± 0.1	2.5	3.0	1.01 ± 0.04
`prek-head sample-config`	2.6 ± 0.1	2.5	2.8	1.00

Cold vs Warm Runs

Comparing first run (cold) vs subsequent runs (warm cache):

`prek run --all-files (cold - no cache)`

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
`prek-base run --all-files`	79.9 ± 3.2	77.2	86.5	1.02 ± 0.05
`prek-head run --all-files`	78.1 ± 1.6	76.5	81.8	1.00

`prek run --all-files (warm - with cache)`

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
`prek-base run --all-files`	75.6 ± 2.1	72.9	80.7	1.01 ± 0.04
`prek-head run --all-files`	75.0 ± 2.2	72.3	80.9	1.00

Full Hook Suite

Running the builtin hook suite on the benchmark workspace:

`prek run --all-files (full builtin hook suite)`

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
`prek-base run --all-files`	76.9 ± 2.0	73.9	82.8	1.01 ± 0.04
`prek-head run --all-files`	76.4 ± 2.2	73.0	81.5	1.00

Individual Hook Performance

Benchmarking each hook individually on the test repo:

`prek run trailing-whitespace --all-files`

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
`prek-base run trailing-whitespace --all-files`	20.6 ± 0.4	19.9	21.4	1.02 ± 0.03
`prek-head run trailing-whitespace --all-files`	20.2 ± 0.4	19.7	21.0	1.00

`prek run end-of-file-fixer --all-files`

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
`prek-base run end-of-file-fixer --all-files`	25.0 ± 1.4	23.4	28.5	1.00
`prek-head run end-of-file-fixer --all-files`	26.3 ± 1.8	23.2	29.7	1.05 ± 0.09

`prek run check-json --all-files`

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
`prek-base run check-json --all-files`	8.3 ± 0.3	7.7	9.3	1.00
`prek-head run check-json --all-files`	8.3 ± 0.2	7.8	8.7	1.00 ± 0.05

`prek run check-yaml --all-files`

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
`prek-base run check-yaml --all-files`	7.9 ± 0.1	7.6	8.2	1.01 ± 0.03
`prek-head run check-yaml --all-files`	7.8 ± 0.2	7.6	8.5	1.00

`prek run check-toml --all-files`

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
`prek-base run check-toml --all-files`	8.5 ± 1.0	7.6	11.7	1.06 ± 0.13
`prek-head run check-toml --all-files`	8.0 ± 0.2	7.6	8.4	1.00

`prek run check-xml --all-files`

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
`prek-base run check-xml --all-files`	7.9 ± 0.2	7.6	8.4	1.00
`prek-head run check-xml --all-files`	8.1 ± 0.2	7.7	8.5	1.02 ± 0.04

`prek run detect-private-key --all-files`

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
`prek-base run detect-private-key --all-files`	13.4 ± 1.1	12.0	15.4	1.01 ± 0.11
`prek-head run detect-private-key --all-files`	13.3 ± 1.1	11.4	15.5	1.00

`prek run fix-byte-order-marker --all-files`

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
`prek-base run fix-byte-order-marker --all-files`	22.3 ± 1.9	19.6	28.0	1.00
`prek-head run fix-byte-order-marker --all-files`	22.4 ± 1.8	19.7	25.2	1.00 ± 0.12

Installation Performance

Benchmarking hook installation (fast path hooks skip Python setup):

`prek install-hooks (cold - no cache)`

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
`prek-base install-hooks`	4.8 ± 0.1	4.7	4.9	1.01 ± 0.02
`prek-head install-hooks`	4.8 ± 0.1	4.7	4.8	1.00

`prek install-hooks (warm - with cache)`

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
`prek-base install-hooks`	4.7 ± 0.1	4.6	4.8	1.00
`prek-head install-hooks`	4.7 ± 0.1	4.6	4.8	1.01 ± 0.02

File Filtering/Scoping Performance

Testing different file selection modes:

`prek run (staged files only)`

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
`prek-base run`	40.4 ± 1.1	38.6	42.0	1.01 ± 0.03
`prek-head run`	40.0 ± 0.7	39.0	41.5	1.00

`prek run --files '*.json' (specific file type)`

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
`prek-base run --files '*.json'`	8.5 ± 0.1	8.3	8.7	1.00 ± 0.02
`prek-head run --files '*.json'`	8.5 ± 0.1	8.2	8.7	1.00

Workspace Discovery & Initialization

Benchmarking hook discovery and initialization overhead:

`prek run --dry-run --all-files (measures init overhead)`

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
`prek-base run --dry-run --all-files`	7.4 ± 0.1	7.2	7.6	1.00
`prek-head run --dry-run --all-files`	8.2 ± 0.8	7.5	10.0	1.10 ± 0.11

⚠️ Warning: Performance regression for prek run --dry-run --all-files (measures init overhead): 10.4500% slower

Meta Hooks Performance

Benchmarking meta hooks separately:

`prek run check-hooks-apply --all-files`

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
`prek-base run check-hooks-apply --all-files`	13.0 ± 0.2	12.8	13.5	1.14 ± 0.02
`prek-head run check-hooks-apply --all-files`	11.4 ± 0.1	11.2	11.5	1.00

✅ Performance improvement for prek run check-hooks-apply --all-files: 12.4000% faster

`prek run check-useless-excludes --all-files`

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
`prek-base run check-useless-excludes --all-files`	38.4 ± 55.3	11.2	203.5	3.37 ± 4.85
`prek-head run check-useless-excludes --all-files`	11.4 ± 0.2	11.1	12.0	1.00

✅ Performance improvement for prek run check-useless-excludes --all-files: 70.3200% faster

`prek run identity --all-files`

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
`prek-base run identity --all-files`	10.5 ± 0.1	10.4	10.6	1.00
`prek-head run identity --all-files`	10.7 ± 0.1	10.5	11.0	1.02 ± 0.01

Copilot

Pull request overview

This PR implements workspace-mode concurrency by running hooks from projects at the same directory depth in parallel (while keeping deepest-to-shallowest ordering), and updates the CLI reporting to keep output stable/deterministic under concurrency.

Changes:

Execute same-depth workspace projects concurrently and then render results in a stable order.
Refactor file ownership/consumption tracking to support parallel project execution at a depth level.
Update hook progress reporting to include pass/fail status and introduce project-level progress grouping; add workspace concurrency tests and adjust docs.

Reviewed changes

Copilot reviewed 27 out of 27 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
docs/workspace.md	Documents same-depth concurrency and updates example output (currently not aligned with implementation output).
crates/prek/tests/workspace.rs	Adds tests for same-depth concurrency + fail-fast depth-level behavior (snapshots currently expect old header format).
crates/prek/src/workspace.rs	Adds `Project::display_name()` for workspace-root naming in UI.
crates/prek/src/cli/run/run.rs	Implements depth-level project concurrency + stable rendering; refactors hook input prep and output formatting.
crates/prek/src/cli/run/filter.rs	Adjusts project file consumption APIs to support per-level tracking for concurrency.
crates/prek/src/cli/reporter.rs	Enhances run reporter to show project grouping and render completed lines with pass/fail.
crates/prek/src/hooks/mod.rs	Updates fast-path completion reporting to include pass/fail.
crates/prek/src/hooks/meta_hooks.rs	Updates completion reporting and adapts to new `ProjectFiles::visit_for_project` signature.
crates/prek/src/hooks/builtin_hooks/mod.rs	Updates completion reporting to include pass/fail.
crates/prek/src/languages/*	Updates language runners to report completion with pass/fail based on aggregated exit status.

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Copilot

Pull request overview

Copilot reviewed 34 out of 34 changed files in this pull request and generated 1 comment.

Copilot

Pull request overview

Copilot reviewed 34 out of 34 changed files in this pull request and generated 4 comments.

Copilot

Pull request overview

Copilot reviewed 53 out of 53 changed files in this pull request and generated 1 comment.

j178 · 2026-05-23T13:16:38Z

Hey @potiuk, this is ready for testing now :). I did a quick test against the Airflow repo, and it looks like this should bring a significant speedup to the overall prek check time. However, I’m still not entirely sure about the correctness, so I’d really appreciate hearing how it works in your actual runs before I merge this.

Copilot

Pull request overview

Copilot reviewed 55 out of 56 changed files in this pull request and generated 1 comment.

j178 added the enhancement New feature or request label May 20, 2026

j178 added the performance Performance improvements label May 20, 2026

j178 marked this pull request as ready for review May 21, 2026 07:11

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j178 force-pushed the project-concurrency-ui branch from 1a7b33d to 13efa89 Compare May 21, 2026 07:59

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j178 and others added 4 commits May 21, 2026 16:04

Run same-depth projects concurrently

9826cc1

Show project progress for concurrent hook runs

ea4764a

Improve

41a098f

Potential fix for pull request finding

e739966

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

j178 force-pushed the project-concurrency-ui branch from b333de5 to e739966 Compare May 21, 2026 08:05

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Comment thread crates/prek/src/cli/reporter.rs Outdated

j178 added 2 commits May 21, 2026 16:24

Tweaks

dfc5a96

Simplify

2dcfcc0

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Comment thread crates/prek/src/languages/pygrep/pygrep.rs

Comment thread crates/prek/src/cli/run/run.rs Outdated

Comment thread crates/prek/src/cli/run/run.rs

Comment thread crates/prek/src/cli/run/run.rs Outdated

j178 added 2 commits May 21, 2026 23:50

Improve

7bcea5d

Update docs example

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Comment thread crates/prek/src/cli/run/run.rs

j178 temporarily deployed to release May 24, 2026 14:36 — with GitHub Actions Inactive

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j178 force-pushed the project-concurrency-ui branch from 14b9c7d to 8a6d677 Compare May 24, 2026 15:16

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Refine workspace hook progress UI

784d945

j178 force-pushed the project-concurrency-ui branch from 8a6d677 to 784d945 Compare May 24, 2026 15:20

j178 temporarily deployed to release May 24, 2026 15:21 — with GitHub Actions Inactive

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Comment thread crates/prek/src/cli/run/run.rs

Tweaks

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Cleanup

c29887d

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j178 merged commit 7cd6ba4 into master May 25, 2026
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j178 deleted the project-concurrency-ui branch May 25, 2026 04:08

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BrewTestBot mentioned this pull request May 26, 2026

prek 0.4.2 Homebrew/homebrew-core#284737

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Codecov Report

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📦 Cargo Bloat Comparison

Head Branch Results

Base Branch Results

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⚡️ Hyperfine Benchmarks

prek --version

prek list

prek validate-config .pre-commit-config.yaml

prek sample-config

prek run --all-files (cold - no cache)

prek run --all-files (warm - with cache)

prek run --all-files (full builtin hook suite)

prek run trailing-whitespace --all-files

prek run end-of-file-fixer --all-files

prek run check-json --all-files

prek run check-yaml --all-files

prek run check-toml --all-files

prek run check-xml --all-files

prek run detect-private-key --all-files

prek run fix-byte-order-marker --all-files

prek install-hooks (cold - no cache)

prek install-hooks (warm - with cache)

prek run (staged files only)

prek run --files '*.json' (specific file type)

prek run --dry-run --all-files (measures init overhead)

prek run check-hooks-apply --all-files

prek run check-useless-excludes --all-files

prek run identity --all-files

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Reviewers

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`prek --version`

`prek list`

`prek validate-config .pre-commit-config.yaml`

`prek sample-config`

`prek run --all-files (cold - no cache)`

`prek run --all-files (warm - with cache)`

`prek run --all-files (full builtin hook suite)`

`prek run trailing-whitespace --all-files`

`prek run end-of-file-fixer --all-files`

`prek run check-json --all-files`

`prek run check-yaml --all-files`

`prek run check-toml --all-files`

`prek run check-xml --all-files`

`prek run detect-private-key --all-files`

`prek run fix-byte-order-marker --all-files`

`prek install-hooks (cold - no cache)`

`prek install-hooks (warm - with cache)`

`prek run (staged files only)`

`prek run --files '*.json' (specific file type)`

`prek run --dry-run --all-files (measures init overhead)`

`prek run check-hooks-apply --all-files`

`prek run check-useless-excludes --all-files`

`prek run identity --all-files`