⚡ Bolt: Optimize attribute resolution and identifier naming#540
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Optimized core transpilation hot paths: - attributes.py: Hoisted lookups, cached type guesses, and improved location-based lookups. - naming.py: Refactored PascalCase conversion to use .capitalize() for a ~6x speedup. - v_types.py: Optimized tuple struct name generation. All relevant tests passed. Co-authored-by: yaskhan <3676373+yaskhan@users.noreply.github.com>
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Pull request overview
This PR introduces micro-optimizations in the transpiler’s hot paths (attribute translation, identifier sanitization, and tuple struct naming) to reduce per-node overhead during AST traversal.
Changes:
- Optimizes
visit_Attributeby hoisting frequently accessed attributes, caching type guesses, and speeding uplocation_maplookups. - Refactors PascalCase type-name conversion to use
str.capitalize()in_sanitize_name. - Slightly streamlines tuple struct name generation in
get_tuple_struct_name.
Reviewed changes
Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.
| File | Description |
|---|---|
py2v_transpiler/core/translator/expressions_split/attributes.py |
Performance tweaks in attribute resolution: local hoists, cached _guess_type, and tuple-key location_map lookup with fallback. |
py2v_transpiler/core/translator/base_split/naming.py |
Faster PascalCase segment normalization using capitalize() in _sanitize_name. |
py2v_transpiler/models/v_types.py |
Minor refactor of tuple struct name generation (split + per-item strip/clean). |
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| # Cache type guess for node.value as it is used multiple times below. | ||
| obj_type_guess = self._guess_type(node.value) | ||
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obj_type_guess = self._guess_type(node.value) is computed unconditionally, but some early-return branches (e.g. __type_params__) don’t use it. Since _guess_type consults the type inference maps and can be relatively expensive, consider computing it lazily (only in branches that need it) or moving it below the early-return cases to avoid work on hot paths.
| # Optimization: Hoisted frequently accessed attributes and cached expensive type guesses. | ||
| imported_modules = self.imported_modules | ||
| defined_classes = getattr(self, "defined_classes", {}) | ||
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| # Handle module attributes (mapped constants or fallback) | ||
| if isinstance(node.value, ast.Name) and node.value.id in self.imported_modules: | ||
| module_name = self.imported_modules[node.value.id] | ||
| if isinstance(node.value, ast.Name) and node.value.id in imported_modules: | ||
| module_name = imported_modules[node.value.id] |
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imported_modules is hoisted into a local, but later in this same method there is still a second module-attribute check that uses self.imported_modules directly. This reduces the benefit of the hoist and introduces inconsistent access patterns; consider using the local consistently (or remove the local if only used once).
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Optimized core transpilation hot paths: - attributes.py: Hoisted lookups, lazy/cached type guesses, and faster tuple-based location lookups. - naming.py: Refactored PascalCase conversion to use .capitalize() for a ~6x speedup. - v_types.py: Optimized tuple struct name generation and string normalization. Addressed PR feedback: - Ensured attr_name is defined early to avoid UnboundLocalError. - Consistently used local hoisted variables. - Moved type guess caching below early-return branches. All tests passed. Co-authored-by: yaskhan <3676373+yaskhan@users.noreply.github.com>
This PR implements several small but high-impact performance optimizations in the transpiler's core AST traversal paths.
💡 What:
py2v_transpiler/core/translator/expressions_split/attributes.py,visit_Attributenow hoistsdefined_classesandimported_moduleslookups. It also caches the result of_guess_type(node.value)and uses faster tuple-based keys forlocation_maplookups.py2v_transpiler/core/translator/base_split/naming.py, the PascalCase conversion logic was refactored to use the built-in.capitalize()method.py2v_transpiler/models/v_types.py,get_tuple_struct_namewas streamlined to reduce redundant string operations.🎯 Why:
These methods are called thousands of times during a typical transpilation run. Reducing attribute lookups, consolidating expensive type guesses, and using more efficient string methods directly reduces the total transpilation time.
📊 Impact:
_sanitize_name(PascalCase branch): ~6x speedup.visit_Attribute: Reduced redundant_guess_typecalls and optimized map lookups.🔬 Measurement:
Verified using synthetic benchmarks in
debug/(e.g.,benchmark_keys.py,benchmark_naming_v2.py,benchmark_capitalize.py) and confirmed correctness viapytest.PR created automatically by Jules for task 3174801665818452266 started by @yaskhan