feat: reduce computations in backprop of lfilter (#3831)
#3661
| Job | Run time |
|---|---|
| 25m 52s | |
| 2m 31s | |
| 0s | |
| 28m 23s |
lfilter (#3831)
#3661
| Job | Run time |
|---|---|
| 25m 52s | |
| 2m 31s | |
| 0s | |
| 28m 23s |