Greptile Overview

Greptile Summary

Optimized the _expired_computed_vars method in reflex/state.py:1980-1984 to eliminate redundant dictionary lookups.

Changes:

• Changed from iterating over keys then looking up values (for cvar in self.computed_vars then self.computed_vars[cvar]) to iterating over items directly (for cvar, cvar_obj in self.computed_vars.items())
• Reduces dictionary access operations from 2 per iteration to 1 per iteration
• Functionally equivalent - returns the same set of expired computed variable names
• Performance improvement with zero logic changes or side effects

Confidence Score: 5/5

• This PR is safe to merge with zero risk - it's a textbook Python performance optimization with no behavioral changes
• The change is a well-known Python optimization pattern that reduces dictionary lookups from O(2n) to O(n) by using .items() instead of key iteration followed by value lookup. The logic is semantically identical, verified through code analysis and Python equivalence testing. No edge cases, no side effects, no new bugs possible.
• No files require special attention

Important Files Changed

File Analysis

Sequence Diagram

sequenceDiagram
    participant State as BaseState
    participant Method as _expired_computed_vars()
    participant Dict as computed_vars dict
    participant CVar as ComputedVar

    State->>Method: Call _expired_computed_vars()
    
    Note over Method,Dict: OLD: for cvar in self.computed_vars<br/>then self.computed_vars[cvar]
    Note over Method,Dict: NEW: for cvar, cvar_obj in<br/>self.computed_vars.items()
    
    Method->>Dict: Iterate over items()
    loop For each computed var
        Dict-->>Method: Return (cvar_name, cvar_obj)
        Method->>CVar: Call needs_update(instance=self)
        CVar-->>Method: Return True/False
        alt Needs update
            Method->>Method: Add cvar_name to result set
        end
    end
    
    Method-->>State: Return set of expired var names

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