Lib zebra h cleanup 2

[donaldsharp]

Second round.

Before:

Executed in   11.94 secs    fish           external
   usr time  169.24 secs    0.00 micros  169.24 secs
   sys time   52.49 secs  628.00 micros   52.48 secs

After:

Executed in   11.85 secs    fish           external
   usr time  166.39 secs  379.00 micros  166.39 secs
   sys time   50.87 secs  206.00 micros   50.87 secs

More time saved in usr time and sys, starting to hit diminishing returns on actual wall clock time for me.

[ton31337]

Seems we have some issues yet with the compilation.