SMRTR ProgrammingApr 19, 2026Daily.dev

Meta Reports 4x Higher Bug Detection with Just-in-Time Testing

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Meta has improved software quality using Just-in-Time testing that dynamically generates tests during code review instead of maintaining static test suites. The approach analyzes code diffs to infer developer intent and creates targeted tests designed to catch regressions, delivering 4x better bug detection in AI-assisted development environments where traditional testing struggles with rapid code changes.

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