⚡️ Speed up method GitHubIssueReader.can_read by 50%

[codeflash-ai]

📄 50% (0.50x) speedup for GitHubIssueReader.can_read in marimo/_cli/file_path.py

⏱️ Runtime : 12.6 microseconds → 8.44 microseconds (best of 33 runs)

📝 Explanation and details

The optimization implements short-circuit evaluation by reordering the conditions in GitHubIssueReader.can_read().

Key change: Instead of is_url(name) and name.startswith(...), the optimized version first checks if not name.startswith(...): return False before calling is_url(name).

Why this is faster:

• Avoids expensive regex matching: The is_url() function uses a complex regex pattern that takes ~8-12 microseconds to execute. The simple string prefix check with startswith() takes only ~1-3 microseconds.
• Early termination: For inputs that don't match the GitHub issues URL pattern (which is likely the common case), the function returns False immediately without invoking the costly regex validation.
• Preserved logic: The optimization maintains identical behavior - both versions return True only when the input is both a valid URL and starts with the specific GitHub issues prefix.

Performance gains: The line profiler shows that is_url() calls dropped from 3 to 1, and the expensive pattern.match() operation was reduced from 3 calls (12,392ns total) to 1 call (8,200ns). This results in a 49% speedup overall.

This optimization is particularly effective for workloads with many non-GitHub URL inputs, as it eliminates unnecessary regex processing through fast string prefix filtering.

✅ Correctness verification report:

Test	Status
⚙️ Existing Unit Tests	✅ 54 Passed
🌀 Generated Regression Tests	🔘 None Found
⏪ Replay Tests	🔘 None Found
🔎 Concolic Coverage Tests	✅ 2 Passed
📊 Tests Coverage	100.0%

⚙️ Existing Unit Tests and Runtime

Test File::Test Function	Original ⏱️	Optimized ⏱️	Speedup
_cli/test_file_path.py::test_github_issue_reader	10.9μs	7.95μs	36.9%✅

🔎 Concolic Coverage Tests and Runtime

Test File::Test Function	Original ⏱️	Optimized ⏱️	Speedup
codeflash_concolic_4al8aq2a/tmp04wyzmjz/test_concolic_coverage.py::test_GitHubIssueReader_can_read	1.75μs	491ns	256%✅

To edit these changes git checkout codeflash/optimize-GitHubIssueReader.can_read-mh5srq7u and push.