fix: avoid race condition in singleton instance method
#4056
| Job | Run time |
|---|---|
| 2m 45s | |
| 2m 56s | |
| 12m 16s | |
| 4m 22s | |
| 5m 51s | |
| 1m 32s | |
| 1m 22s | |
| 3m 46s | |
| 2m 32s | |
| 1m 7s | |
| 1m 10s | |
| 1m 58s | |
| 6m 10s | |
| 47m 47s |
instance method
#4056
| Job | Run time |
|---|---|
| 2m 45s | |
| 2m 56s | |
| 12m 16s | |
| 4m 22s | |
| 5m 51s | |
| 1m 32s | |
| 1m 22s | |
| 3m 46s | |
| 2m 32s | |
| 1m 7s | |
| 1m 10s | |
| 1m 58s | |
| 6m 10s | |
| 47m 47s |