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Iterating a cursor or calling fetchone() in a loop is 100x+ slower than fetchall() (affects SQLAlchemy) (#981) #3453

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Iterating a cursor or calling fetchone() in a loop is 100x+ slower than fetchall() (affects SQLAlchemy) (#981)

Iterating a cursor or calling fetchone() in a loop is 100x+ slower than fetchall() (affects SQLAlchemy) (#981) #3453

Run time

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Job Run time
check-types (3.14)
19s
check-linting (3.10)
18s
check-types (3.10)
18s
Unit Tests (Python 3.14, min deps)
2m 15s
Unit Tests (Python 3.11, default deps)
2m 8s
Unit Tests + Kernel (Python 3.10)
2m 52s
check-types (3.11)
19s
check-linting (3.11)
16s
Unit Tests (Python 3.12, default deps)
2m 11s
Unit Tests + Kernel (Python 3.13)
2m 51s
check-types (3.13)
22s
Unit Tests + Kernel (Python 3.14)
2m 47s
Unit Tests (Python 3.10, min deps)
2m 12s
check-linting (3.12)
18s
Unit Tests (Python 3.11, min deps)
2m 7s
Unit Tests (Python 3.13, default deps)
2m 16s
check-linting (3.14)
3m 59s
Unit Tests + Kernel (Python 3.11)
2m 52s
Unit Tests + PyArrow (Python 3.14, default deps)
2m 44s
Unit Tests + PyArrow (Python 3.10, default deps)
2m 47s
check-linting (3.13)
3m 59s
Unit Tests + PyArrow (Python 3.13, default deps)
2m 45s
check-types (3.12)
19s
Unit Tests + Kernel (Python 3.12)
2m 45s
Unit Tests + PyArrow (Python 3.14, min deps)
2m 57s
Unit Tests + PyArrow (Python 3.11, min deps)
2m 41s
Unit Tests (Python 3.10, default deps)
2m 9s
Unit Tests + PyArrow (Python 3.11, default deps)
2m 43s
Unit Tests + PyArrow (Python 3.10, min deps)
2m 44s
Unit Tests (Python 3.14, default deps)
2m 14s
Unit Tests + PyArrow (Python 3.12, default deps)
2m 42s
1h 4m 9s