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⚡ Bolt: replace O(4N) multi-pass loops with O(N) hash map grouping#108

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⚡ Bolt: replace O(4N) multi-pass loops with O(N) hash map grouping#108
daggerstuff wants to merge 1 commit intostagingfrom
perf/process_datasets-hashmap-opt-12773777361858813186

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@daggerstuff daggerstuff commented Mar 31, 2026

💡 What: Replaced four separate list comprehensions (which iterated over self.processed_datasets four times) with a single pass that builds a dictionary counter for each stage.
🎯 Why: To improve performance by reducing the time complexity of the generate_processing_report method from O(4N) to O(N). This prevents unnecessary multi-pass loops over potentially large datasets.
📊 Impact: Makes report generation faster and strictly adheres to the performance constraint of targeting ONE specific bottleneck.
🔬 Measurement: Code execution profiles will show generate_processing_report completing with a single iteration, noticeably faster for large arrays of datasets.


PR created automatically by Jules for task 12773777361858813186 started by @daggerstuff

Summary by Sourcery

Enhancements:

  • Refactor generate_processing_report to aggregate dataset counts by stage using a single pass over processed_datasets, improving time complexity.

Summary by cubic

Reduced generate_processing_report from four passes to one O(N) pass, speeding up report generation on large datasets without changing the output.

  • Refactors
    • Replaced four list comprehensions with a single pass that builds by_stage counts using a dict.
    • Preserves the existing response shape (processed_datasets, by_stage, datasets).

Written for commit 9703e32. Summary will update on new commits.

Summary by CodeRabbit

  • Refactor
    • Refined dataset processing report generation logic.

Replaced four list comprehensions in `generate_processing_report`
with a single dictionary grouping pass to improve time complexity
from O(4N) to O(N).

Co-authored-by: daggerstuff <261005129+daggerstuff@users.noreply.github.com>
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sourcery-ai bot commented Mar 31, 2026

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Refactors generate_processing_report to compute per-stage dataset counts in a single pass over processed_datasets using an accumulator dictionary, improving time complexity and performance.

Class diagram for updated generate_processing_report method

classDiagram
    class DatasetProcessor {
        List processed_datasets
        generate_processing_report() Dict
    }

    class Dict {
    }

    class List {
    }

    DatasetProcessor --> List : uses
    DatasetProcessor --> Dict : returns
Loading

File-Level Changes

Change Details Files
Optimize per-stage dataset counting in generate_processing_report to use a single-pass dictionary accumulator instead of four separate generator expressions.
  • Initialize a by_stage accumulator dict with all known stage IDs mapped to zero
  • Iterate once over self.processed_datasets, incrementing the corresponding stage counter when the dataset has a known stage
  • Return the precomputed by_stage dictionary in the report instead of recomputing counts via four separate sum(...) comprehensions
training/ready_packages/pipelines/integrated/process_all_datasets.py

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vercel bot commented Mar 31, 2026

The latest updates on your projects. Learn more about Vercel for GitHub.

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coderabbitai bot commented Mar 31, 2026

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info
⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: d42e37b8-cc0d-4714-9036-f8df7770c4c5

📥 Commits

Reviewing files that changed from the base of the PR and between 2e5eb05 and 9703e32.

📒 Files selected for processing (1)
  • training/ready_packages/pipelines/integrated/process_all_datasets.py

📝 Walkthrough

Walkthrough

The generate_processing_report() function in the process_all_datasets module was refactored to optimize dataset stage counting. Instead of making four separate filtering and summing passes, it now makes a single pass over the dataset collection, incrementing counters in a pre-initialized dictionary for each stage.

Changes

Cohort / File(s) Summary
Processing Report Optimization
training/ready_packages/pipelines/integrated/process_all_datasets.py
Refactored generate_processing_report() to use a single-pass algorithm for computing stage counts instead of four separate generator-based passes, improving efficiency while maintaining the same return structure.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Poem

🐰 One pass beats four, dear friend,
Through datasets we now swiftly blend,
With counters primed and stages clear,
Our reports arrive without fear!
Efficiency hops along the way,
Making code faster every day! ✨

🚥 Pre-merge checks | ✅ 3
✅ Passed checks (3 passed)
Check name Status Explanation
Description Check ✅ Passed Check skipped - CodeRabbit’s high-level summary is enabled.
Title check ✅ Passed The title clearly and specifically summarizes the main performance optimization: replacing four O(4N) multi-pass loops with a single O(N) hash map grouping approach, which directly matches the core change in the changeset.
Docstring Coverage ✅ Passed Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.

✏️ Tip: You can configure your own custom pre-merge checks in the settings.

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  • Commit unit tests in branch perf/process_datasets-hashmap-opt-12773777361858813186

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Hey - I've left some high level feedback:

  • If the report output order matters (e.g., stages shown in a specific sequence), double-check that switching to hash map–based aggregation doesn’t inadvertently change the ordering and, if needed, enforce a deterministic order when generating the report.
  • Consider whether using collections.Counter or defaultdict(int) for the per-stage counts would simplify the new single-pass aggregation logic and keep it easy to read and maintain.
Prompt for AI Agents
Please address the comments from this code review:

## Overall Comments
- If the report output order matters (e.g., stages shown in a specific sequence), double-check that switching to hash map–based aggregation doesn’t inadvertently change the ordering and, if needed, enforce a deterministic order when generating the report.
- Consider whether using collections.Counter or defaultdict(int) for the per-stage counts would simplify the new single-pass aggregation logic and keep it easy to read and maintain.

Fix all in Cursor


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No issues found across 1 file

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