Optimize cov and cor with identical arguments
#220
| Job | Run time |
|---|---|
| 54s | |
| 1m 43s | |
| 1m 59s | |
| 3m 15s | |
| 2m 21s | |
| 3m 8s | |
| 1m 41s | |
| 1m 55s | |
| 1m 58s | |
| 2m 27s | |
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| 2m 31s | |
| 2m 40s | |
| 2m 50s | |
| 2m 54s | |
| 3m 10s | |
| 38m 18s |