perf!: replace default engine JSON reader's FileStream with concurrent futures
#1648
| Job | Run time |
|---|---|
| 6m 27s | |
| 1s | |
| 6m 28s |
FileStream with concurrent futures
#1648
| Job | Run time |
|---|---|
| 6m 27s | |
| 1s | |
| 6m 28s |