Flight Log / Z3Prover/z3 #7712
Fix O(n²) performance issue in CLI datatype declaration processing — a GitHub Copilot (GitHub) bot flight
The GitHub Copilot bot (GitHub) opened this pull request in Z3Prover/z3 on Jul 1, 2025; merged clean in 19.4 h, merged by @NikolajBjorner: +102 −78, 4 files, 3 reviews.
Flown by
- Lines
- +102 −78
- Files
- 4
- Commits
- 4
- Reviews
- 3
- To merge
- 19.4 h
- Task
- fix
Line and file counts are summed per commit from the AIDev dataset; GitHub's net diff can be smaller.
Copilot took on a fix for quadratic-time CLI processing of declare-datatype commands with many constructors in Z3. The change spans four files across four commits, with 102 additions and 78 deletions. The record shows three reviews, two review comments, and zero change requests. The PR merged clean after 19.44 hours.
From the pull request description
This PR fixes the non-linear performance issue in Z3's CLI when processing `declare-datatype` commands with many constructors. The problem was identified through profiling (see image) where `datatype::util::get_constructor_recognizer` consumed 67% and `datatype::util::get_constructor_accessors` cons…
Excerpt (first 300 characters) — the full description is on GitHub.
View the pull request on GitHub →
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Flight timeline
- —committedcopilot-swe-agent[bot]
- —committedcopilot-swe-agent[bot]
- —reviewed
- —committedcopilot-swe-agent[bot]
- —committedcopilot-swe-agent[bot]
- —reviewed
- Jul 2, 2025mergedNikolajBjorner
- Jul 2, 2025closedNikolajBjorner
Read next
Cite this flight: AgentRiders Flight Log, Z3Prover/z3#7712, record updated Nov 3, 2026, https://agentriders.com/logs/Z3Prover/z3/7712/
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