Without the patch:
```
# for i in $(seq 1 10); do rm -rf /usr/obj/*; time make -s -j96 buildkernel >/dev/null; done
285.97 real 19522.85 user 1936.66 sys
288.78 real 19520.76 user 1978.89 sys
287.94 real 19501.91 user 1971.79 sys
289.48 real 19706.73 user 1932.10 sys
290.79 real 19713.99 user 1948.50 sys
288.80 real 19685.91 user 1933.88 sys
288.42 real 19542.20 user 1984.51 sys
286.64 real 19622.04 user 1981.77 sys
288.69 real 19677.83 user 1942.67 sys
288.19 real 19562.56 user 2058.54 sys
```
With the patch:
```
# for i in $(seq 1 10); do rm -rf /usr/obj/*; time make -s -j96 buildkernel >/dev/null; done
292.29 real 19958.96 user 1991.81 sys
292.27 real 19829.13 user 2050.19 sys
291.41 real 19895.03 user 2082.85 sys
292.82 real 19890.24 user 2056.42 sys
293.86 real 19885.27 user 2035.74 sys
292.91 real 20037.41 user 2004.77 sys
291.22 real 19783.27 user 2059.31 sys
294.11 real 19859.86 user 2069.68 sys
293.40 real 19863.36 user 2040.41 sys
290.77 real 20040.79 user 1950.22 sys
```