Consistent Semantic Identifiers

When adding/changing code, use names that (1) match existing project conventions, (2) clearly express intent, and (3) avoid reserved/problematic identifier patterns.

Rules:

• Avoid reserved naming: do not use local variable names starting with _ (e.g., prefer top, front, behind over _top, _front).
• Use semantic, intent-revealing names: avoid vague placeholders like size_threshold; prefer names that encode behavior/meaning (e.g., budget_count_threshold / budget_drop_threshold).
• Follow established naming patterns: use the project’s width/height/etc. suffix conventions consistently (e.g., kernel_w, stride_w, and similarly out_w, out_h).
• Align dimension/axis naming to ncnn semantics: use the same axis ordering and naming expected by the codebase (commonly z y x meaning dep/row/col), and ensure axis transforms follow ncnn conventions.
• Keep platform and parameter identifiers correct: use the correct architecture macro names and ensure variable/index names correspond to the documented parameter meaning/order.

Example (naming fixes):

// Bad: reserved leading underscore + vague intent
int _top;
size_t size_threshold = 10;

// Good: non-reserved + semantic intent
int top;
size_t budget_drop_threshold = 10;

// Good: follow *_w / *_h conventions
int out_w = pd.get(18, out_h);