Majority C rewrite

[samhaswon]

Rewrote the majority of the search code in C for a major memory reduction.

• Before:

  • Total object size of 566 MiB

  • Single-loaded version (KJV) object size of 27.6 MiB

  • ~290μs per query (on my machine)

• Now:

  • Total object size of 88.1 MiB

  • Single-loaded version (KJV) object size of 9.3 MiB

  • ~64μs per query (on my machine)

Index unloading is also supported with the unload_version method.