This provides a decent speedup:
```
$ hyperfine 'git checkout master; brew help' 'git checkout help_bash; brew help'
Benchmark 1: git checkout master; brew help
Time (mean ± σ): 506.4 ms ± 50.9 ms [User: 223.7 ms, System: 99.9 ms]
Range (min … max): 454.6 ms … 634.1 ms 10 runs
Benchmark 2: git checkout help_bash; brew help
Time (mean ± σ): 109.5 ms ± 57.1 ms [User: 1
```
and compares favourably to `pip3 help`:
```
$ hyperfine 'brew help' 'pip3 help'
Benchmark 1: brew help
Time (mean ± σ): 72.9 ms ± 15.9 ms [User: 4.9 ms, System: 6.3 ms]
Range (min … max): 53.6 ms … 126.6 ms 31 runs
Benchmark 2: pip3 help
Time (mean ± σ): 171.5 ms ± 6.1 ms [User: 131.6 ms, System: 24.7 ms]
Range (min … max): 164.2 ms … 189.3 ms 15 runs
Summary
brew help ran
2.35 ± 0.52 times faster than pip3 help
```
