io: extend Buf length only after having read into it
#11149
| Job | Run time |
|---|---|
| 6s | |
| 17s | |
| 35s | |
| 3s | |
| 54s | |
| 20s | |
| 1s | |
| 5m 50s | |
| 6m 57s | |
| 2m 39s | |
| 3m 21s | |
| 2m 7s | |
| 2m 23s | |
| 3m 43s | |
| 4m 44s | |
| 5m 54s | |
| 15m 57s | |
| 1m 48s | |
| 19s | |
| 49s | |
| 6m 51s | |
| 56s | |
| 3m 42s | |
| 4m 24s | |
| 3m 8s | |
| 3m 12s | |
| 46s | |
| 1m 40s | |
| 1m 35s | |
| 3m 55s | |
| 22s | |
| 14s | |
| 1m 18s | |
| 20s | |
| 58s | |
| 13s | |
| 2m 52s | |
| 8m 47s | |
| 7m 9s | |
| 8m 31s | |
| 3m 7s | |
| 2m 35s | |
| 9m 12s | |
| 2m 55s | |
| 7m 50s | |
| 52s | |
| 3m 19s | |
| 10m 15s | |
| 45s | |
| 1m 54s | |
| 6m 6s | |
| 25s | |
| 3m 2s | |
| 2m 29s | |
| 46s | |
| 16s | |
| 49s | |
| 1m 16s | |
| 2m 11s | |
| 1m 13s | |
| 46s | |
| 18s | |
| 1m 20s | |
| 37s | |
| 50s | |
| 2m 26s | |
| 2m 16s | |
| 1s | |
| 3h 9m 31s |