pageserver: make BufferedWriter do double-buffering
#766
| Job | Run time |
|---|---|
| 4s | |
| 9s | |
| 1h 0m 16s | |
| 1h 0m 29s |
BufferedWriter do double-buffering
#766
| Job | Run time |
|---|---|
| 4s | |
| 9s | |
| 1h 0m 16s | |
| 1h 0m 29s |