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**File:** api/blueprints/v1/workflows.py:115-122 **Problem:** `subprocess.run()` is synchronous and blocks the event loop for up to 10 seconds during Python DSL conversion. Stalls all concurrent requests. **Fix:** Use async subprocess: ```python proc = await asyncio.create_subprocess_exec( 'python3', tmp_file_path, stdout=asyncio.subprocess.PIPE, stderr=asyncio.subprocess.PIPE, cwd='/tmp' ) stdout, stderr = await asyncio.wait_for(proc.communicate(), timeout=10) ``` **Impact:** Prevents event loop stalling. Handles 10x more concurrent DSL submissions.
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