cleanup: improve perf populate_cmdline
#6912
| Job | Run time |
|---|---|
| 6m 35s | |
| 16m 25s | |
| 4m 57s | |
| 23m 7s | |
| 15m 24s | |
| 25m 45s | |
| 5m 3s | |
| 11m 0s | |
| 4m 37s | |
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| 5m 0s | |
| 5m 14s | |
| 8m 12s | |
| 2m 43s | |
| 31m 56s | |
| 41m 25s | |
| 1m 21s | |
| 8m 59s | |
| 13m 21s | |
| 19m 4s | |
| 20m 44s | |
| 4h 55m 44s |