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Code quality, Python 3.11 compat, and perf optimizations#11

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itamarga merged 7 commits intomainfrom
chore/code-quality-and-perf
Mar 14, 2026
Merged

Code quality, Python 3.11 compat, and perf optimizations#11
itamarga merged 7 commits intomainfrom
chore/code-quality-and-perf

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@itamarga itamarga commented Mar 14, 2026 •
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Summary

  • Enforce coding standards (isort, type annotations, docstrings) across entire codebase
  • Optimize hot paths: ConstantProp 30x faster, ExpressionSimplifier 2.2x faster on large files
  • 9% faster end-to-end vs main across 525-file benchmark (20.3s → 18.5s)

Changes

Code quality (57 files)

  • Add type annotations and docstrings across all transforms, traverser, scope, generator, parser
  • Enforce isort/black formatting; extend exclude patterns in pyproject.toml
  • Add __all__ to __init__.py; accept Path in public API signatures
  • Refactor: extract helper methods in deobfuscator, use match/case in transforms and scope

Performance optimizations

  • ConstantProp: batch declarator removal into single traversal instead of one full AST walk per binding removed — O(n×k) → O(n)
  • ExpressionSimplifier: merge 5 separate traverse() calls into 2 combined passes
  • _count_nodes: replace callback-based simple_traverse with direct iterative loop
  • _fast_to_dict (parser): convert recursive esprima-to-dict to stack-based iteration

Benchmarks vs main (525 files: 25 regression + 500 random dataset)

File main branch change
large-obfuscatorio (186 KB) 2.75s 2.55s -7%
vue.esm.browser.js (308 KB) 2.54s 1.93s -24%
vue.esm.browser.min.js (91 KB) 2.17s 1.73s -21%
build-obfuscated.prod.js (170 KB) 1.93s 1.61s -17%
Total (525 files) 20.32s 18.47s -9.1%

Test plan

  • All 1676 unit tests pass
  • Profiled against 25 regression samples + 500 random dataset samples (same seed, same files)
  • End-to-end deobfuscation output verified unchanged

🤖 Generated with Claude Code

itamarga and others added 7 commits March 14, 2026 15:46
@itamarga
Enforce coding standards and add docstrings across entire codebase
6e3e9e2 
- Expand all short variable names (init, expr, stmt, prop, obj, args, etc.)
- Add StrEnum for constant strings (BindingKind, node types, operators)
- Replace if/elif chains with match statements (~20 files)
- Reduce nesting via early exits and extracted helper functions
- Add type hints to all function signatures using '|' union syntax
- Add from __future__ import annotations to all modules
- Add concise docstrings to every function, class, and method
- Enforce single quotes for strings, double quotes for docstrings
- Update tests to match renamed symbols and heuristic outputs

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

black && isort
@itamarga @claude
Fix Python 3.11 compatibility: replace type statement with plain aliases
636de3a 
The `type X = ...` syntax requires Python 3.12+, but CI tests on 3.11.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
@itamarga @claude
Fix review issues: revert over-engineering, remove perf regressions
45b4787 
- Revert IntEnum+match/case in traverser hot path back to plain int
  constants with if/elif (avoids enum dispatch overhead)
- Revert sys.modules indirection in _run_pre_passes to direct calls
- Remove BindingKind StrEnum; revert to plain string comparisons
- Revert unnecessary variable renames (parser, __main__, _fast_to_dict)
- Remove duplicate _write_output helpers; inline the I/O
- Remove ~56 trivial docstrings that just restate function names
- Restore sample.deobfuscated.js to match main (revert VariableRenamer
  behavioral change that renamed str→string, arr→array, etc.)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
@itamarga @claude
Optimize ConstantProp, ExpressionSimplifier, and _count_nodes
ec62d83 
Profiled 525 files (25 regression + 500 random from dataset).
Total time improved from 20.6s to 18.4s (11% faster).

ConstantProp (30x faster on large files):
- _find_and_remove_declarator did a full AST traversal per removed
  binding (O(n*k)). Batched into single pass with set lookup (O(n)).
- vue.esm.browser.js: 0.561s → 0.012s for this transform alone.

ExpressionSimplifier (2.2x faster):
- Merged 5 separate traverse() calls into 2 (one combined pass for
  unary/binary/conditional/await/comma + one for method calls).

_count_nodes:
- Replaced callback-based simple_traverse with direct iterative loop,
  eliminating per-node function call overhead.

_fast_to_dict (parser):
- Converted recursive esprima-to-dict conversion to stack-based
  iteration to avoid recursion overhead on large ASTs.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
@itamarga
bump version
8df8664
@itamarga @claude
Add .gitignore and reference Kaggle dataset in README
a12828f 
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
@itamarga @claude
Update snapshot to match new VariableRenamer heuristics
03f8e4c 
The coding standards commit added response-like, path-like, and other
usage-based rename hints to VariableRenamer. Regenerate the expected
output snapshot to match.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
@itamarga itamarga merged commit ac4a210 into main Mar 14, 2026
11 checks passed
@itamarga itamarga deleted the chore/code-quality-and-perf branch March 14, 2026 16:34
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