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dev.sec-regex-match Calculator
Calculates regex engine execution time, backtracking steps, and match rate for a pattern against a corpus in a security engineering and compliance context. Catastrophic backtracking in greedy regex can cause exponential time complexity — ReDoS (Regex Denial of Service) exploits this by crafting adversarial input strings.
Inputs
Pattern Len
Linear measurement. Ensure consistent units: 1 m = 1,000 mm = 3.281 ft.
Input Len
Linear measurement. Ensure consistent units: 1 m = 1,000 mm = 3.281 ft.
Backtrack
A multiplier applied in the calculation.
Results
match complexity
Algorithmic complexity class (e.g. O(n), O(n log n), O(n^2)). Determines how runtime or memory scales with input size.
est. match time
The computed duration or time value.
input chars
Sample size or count used in the calculation.
pattern chars
The pattern or structure identified in the data.
performance tier
The category or performance band this result falls into.