Individual skill
evo-parallel-determinism
Provides patterns and utilities to ensure parallel TF-IDF results are identical to the sequential baseline, addressing floating-point ordering, tie-breaking, and pickling compatibility.
tasks-evolved/parallel-tfidf-search/environment/skills/evo-parallel-determinism/SKILL.md
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SKILL.mdcore · 1,270 bytesSKILL.mdcore · 1,270 bytesscripts/utils.pyruns · 2,811 bytes
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# Parallel Determinism
## Overview
Ensures parallel results match sequential exactly by handling:
- Floating-point accumulation order
- Tie-breaking in result sorting
- Pickling compatibility for multiprocessing
- Safe context selection (fork vs spawn)
## Key Principles
1. **FP Ordering**: Iterate query terms in same order as sequential (dict insertion order)
2. **Tie-breaking**: Sort by (-score, doc_id) for deterministic ordering
3. **Pickling**: Define NamedTuples/dataclasses at module level
4. **Context**: Use 'fork' on Linux for performance (copy-on-write)