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Get Started Free →Read and repair a regular expression: anchoring, catastrophic backtracking, and the character class that quietly matches a newline.
| Test case | Without → With | Effect | Δ tokens | Δ turns |
|---|---|---|---|---|
| case-19 | ✗→✓ | ▲ Improved | 32% | 0% |
| case-07 | ✓→✗ | ▼ Worse | 25% | 0% |
| case-01 | ✓→✓ | ＝ Same ✓ | 212% | 0% |
| case-03 | ✓→✓ | ＝ Same ✓ | -24% | 0% |
| case-04 | ✓→✓ | ＝ Same ✓ | 29% | 0% |
Read and repair a regular expression: anchoring, catastrophic backtracking, and the character class that quietly matches a newline.
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