perf!: replace default engine JSON reader's FileStream with concurrent futures
#1667
| Job | Run time |
|---|---|
| 3m 50s | |
| 2s | |
| 3m 52s |
FileStream with concurrent futures
#1667
| Job | Run time |
|---|---|
| 3m 50s | |
| 2s | |
| 3m 52s |