Paul Wells

improve performance

4

add the improvement to `getAltIndex` by @MeteorsLiu from their abandoned pr. simplify `getNextPow2` use a per filter rng for `randi` to avoid contention preallocate temporary read/write buffer in encode/decode pack...

To fix it I had to change line 144 of worker.js from this.child.stdin.end() to this.child.kill()...

for methods like `CheckEnabled` in the agent service returning false is handled the same as if there were no response.