fix(processConcurrency): improve process concurrency count by twlite · Pull Request #143 · yamadashy/repomix

twlite · 2024-10-30T05:26:11Z

This method returns an estimate of the default amount of parallelism a program should use, compared to cpus().length which returns the cpu core count.

bolt-new-by-stackblitz · 2024-10-30T05:26:14Z

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coderabbitai · 2024-10-30T05:26:18Z

📝 Walkthrough

Walkthrough

The changes involve the modification of the getProcessConcurrency function in src/shared/processConcurrency.ts. The previous method of determining the number of available CPUs has been replaced. The old implementation relied on os.cpus().length with a fallback to return 1 if the count was zero. This fallback has been removed, and the function now uses os.availableParallelism() to directly obtain the number of available parallel processes, adjusting the return value to ensure at least one CPU is utilized.

Changes

File Path	Change Summary
src/shared/processConcurrency.ts	Updated `getProcessConcurrency` function to use `os.availableParallelism()` instead of `os.cpus().length`, removing the fallback logic. Return value adjusted to `Math.max(1, cpuCount - 1)`.

Sequence Diagram(s)

sequenceDiagram
    participant A as User
    participant B as getProcessConcurrency
    participant C as os

    A->>B: Call getProcessConcurrency()
    B->>C: Call os.availableParallelism()
    C-->>B: Return available CPU count
    B-->>A: Return adjusted CPU count (Math.max(1, cpuCount - 1))

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Files that changed from the base of the PR and between a9b1780 and 60694ee.

📒 Files selected for processing (1)

src/shared/processConcurrency.ts (1 hunks)

🚧 Files skipped from review as they are similar to previous changes (1)

src/shared/processConcurrency.ts

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coderabbitai

Actionable comments posted: 1

📜 Review details

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Review profile: CHILL

📥 Commits

Files that changed from the base of the PR and between 2ced938 and a9b1780.

📒 Files selected for processing (1)

src/shared/processConcurrency.ts (1 hunks)

🔇 Additional comments (1)

src/shared/processConcurrency.ts (1)

4-7: LGTM! Good practice for CPU allocation.

The implementation correctly:

Uses availableParallelism() which is more accurate than cpus().length
Reserves one CPU for system tasks with cpuCount - 1
Ensures at least one CPU is available with Math.max(1, ...)

codecov · 2024-10-30T13:11:55Z

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.37%. Comparing base (2ced938) to head (60694ee).
Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #143      +/-   ##
==========================================
+ Coverage   75.29%   75.37%   +0.08%     
==========================================
  Files          36       36              
  Lines        1550     1547       -3     
  Branches      270      270              
==========================================
- Hits         1167     1166       -1     
+ Misses        383      381       -2

☔ View full report in Codecov by Sentry.
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`|| 1` is not needed since we already have Math.max

yamadashy · 2024-10-30T13:28:17Z

Hi, @twlite
Thanks for the contribution!

I wasn't aware of os.availableParallelism() - this is an excellent improvement that enables more accurate process concurrency control.

The implementation looks good, so I'll go ahead and merge this PR.

fix(processConcurrency): improve process concurrency count

a9b1780

coderabbitai bot reviewed Oct 30, 2024

View reviewed changes

Comment thread src/shared/processConcurrency.ts Outdated

fix: apply suggestions

adc9007

twlite added 2 commits October 30, 2024 19:02

chore: lint fix

e3d4622

Update processConcurrency.ts

60694ee

`|| 1` is not needed since we already have Math.max

yamadashy approved these changes Oct 30, 2024

View reviewed changes

yamadashy merged commit 603ecc8 into yamadashy:main Oct 30, 2024

twlite deleted the patch-2 branch October 30, 2024 13:47

coderabbitai bot mentioned this pull request Apr 5, 2026

perf(core): Reduce worker thread contention for faster pipeline execution #1409

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fix(processConcurrency): improve process concurrency count#143

fix(processConcurrency): improve process concurrency count#143
yamadashy merged 4 commits intoyamadashy:mainfrom
twlite:patch-2

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