perf!: replace default engine JSON reader's FileStream with concurrent futures
#1650
| Job | Run time |
|---|---|
| 6m 33s | |
| 2s | |
| 6m 35s |
FileStream with concurrent futures
#1650
| Job | Run time |
|---|---|
| 6m 33s | |
| 2s | |
| 6m 35s |