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69fc1ea238
if the table is an intkey table, we can read the rowid directly without
deserializing the full cell, and we also don't need to start
deserializing the record if only the rowid is requested.
```sql
Benchmarking Execute `SELECT * FROM users LIMIT ?`/limbo_execute_select_rows/1: Collecting 100 samples in estimated 5.0007 s (11M i
Execute `SELECT * FROM users LIMIT ?`/limbo_execute_select_rows/1
time: [469.38 ns 470.77 ns 472.40 ns]
change: [-5.8959% -5.5232% -5.1840%] (p = 0.00 < 0.05)
Performance has improved.
Found 4 outliers among 100 measurements (4.00%)
2 (2.00%) high mild
2 (2.00%) high severe
Benchmarking Execute `SELECT * FROM users LIMIT ?`/limbo_execute_select_rows/10: Collecting 100 samples in estimated 5.0088 s (1.9M
Execute `SELECT * FROM users LIMIT ?`/limbo_execute_select_rows/10
time: [2.6523 µs 2.6596 µs 2.6685 µs]
change: [-8.7117% -8.4083% -8.0949%] (p = 0.00 < 0.05)
Performance has improved.
Found 7 outliers among 100 measurements (7.00%)
1 (1.00%) low mild
3 (3.00%) high mild
3 (3.00%) high severe
Benchmarking Execute `SELECT * FROM users LIMIT ?`/limbo_execute_select_rows/50: Collecting 100 samples in estimated 5.0197 s (399k
Execute `SELECT * FROM users LIMIT ?`/limbo_execute_select_rows/50
time: [12.514 µs 12.545 µs 12.578 µs]
change: [-9.5243% -9.0562% -8.6227%] (p = 0.00 < 0.05)
Performance has improved.
Found 4 outliers among 100 measurements (4.00%)
2 (2.00%) high mild
2 (2.00%) high severe
Benchmarking Execute `SELECT * FROM users LIMIT ?`/limbo_execute_select_rows/100: Collecting 100 samples in estimated 5.0600 s (202
Execute `SELECT * FROM users LIMIT ?`/limbo_execute_select_rows/100
time: [25.135 µs 25.291 µs 25.470 µs]
change: [-8.8822% -8.3943% -7.8854%] (p = 0.00 < 0.05)
Performance has improved.
```
"only" 4x slower than sqlite on `SELECT * FROM users LIMIT 100` after
this!
Reviewed-by: Pere Diaz Bou <pere-altea@homail.com>
Closes #2382