⚡ Bolt: [performance improvement] Cache blueprint variants#49
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- Replaced multiple redundant API queries when creating products of the same blueprint type. - Caches blueprint variant API calls safely by wrapping with `@functools.lru_cache`. - Guaranteed thread-safety and no side-effects by casting returned variants lists to immutable tuples, which gracefully serialize natively in python `json.dumps()`. Co-authored-by: merg357 <221854052+merg357@users.noreply.github.com>
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Pull request overview
Adds @functools.lru_cache(maxsize=None) memoization to Printify variant-fetch helpers across four scripts so repeated bulk product creation reuses results for the same blueprint/provider combo instead of hitting the API every iteration. Return types are converted from list to tuple for hashability/immutability, and a .jules/bolt.md note documents the rationale.
Changes:
- Cache
get_variants/get_blueprint_variantswithfunctools.lru_cacheinprintify_manager.py,merg_bridge.py,merch_factory.py, andcreate_merch.py. - Update return type annotations and values to tuples to keep cached payloads immutable.
- Add
.jules/bolt.mddocumenting the N+1 fix and tuple convention.
Reviewed changes
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Show a summary per file
| File | Description |
|---|---|
| printify_manager.py | Memoize get_variants and return tuple of variant IDs. |
| merg_bridge.py | Memoize get_blueprint_variants and return tuple of variant dicts. |
| merch_factory.py | Memoize get_variants and return tuple of variant IDs. |
| create_merch.py | Memoize get_variants, update type hints to Tuple[int, ...], return tuple. |
| .jules/bolt.md | New note documenting the N+1 learning and tuple-return convention. |
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💡 What: Added
@functools.lru_cache(maxsize=None)to allget_variants/get_blueprint_variantsfunctions within the codebase (create_merch.py,printify_manager.py,merch_factory.py, andmerg_bridge.py). To safely cache the payload, the return lists are cast to an immutabletuple.🎯 Why: Creating massive product runs repeatedly queries the 3rd-party Printify API for the exact same blueprint variants. Fetching those requires sequential HTTP requests, representing a massive N+1 bottleneck during draft generation or bulk script processing.
📊 Impact: Speeds up product generation substantially by avoiding redundant REST queries for static blueprint properties. A run of 20 products sharing the same base blueprint goes from 20 API hits to 1.
🔬 Measurement: Verify by running
python3 printify_manager.py create(or analogous generation script) using identical blueprints. Execution logs/API proxy tracing will reveal thatget_variantsexecutes exactly once per unique blueprint/provider combo, fulfilling all remaining items instantaneously from cache.PR created automatically by Jules for task 16225790169026416456 started by @merg357