Brian Neumann-Fopiano df34f328e7 Pregeneration throughput ...

A pregeneration now generates in multicore mode: the matter stage runs
on the calling thread so its mantle window fans out across the burst
pool while biome and terrain run alongside, components are claimed
through the in-flight map so overlapping windows join instead of
blocking, and each region's chunks are ordered in stride-4 lattices so
consecutive chunks never share a window. Hydrology tiles for the whole
area are planned ahead nearest the centre first on a dedicated planning
pool, and the ring around every needed tile stays planned as the front
moves. Height bounds at grid corners are shared between threads and
from planning into generation, the sole engine of a pack is answered
from a snapshot instead of the registry lock, composed chunk keys are
mixed, cached tiles are answered in place, the burst pool grows to two
workers per core for the run, and large chunk-worker pools admit up to
256 requests.

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main

Pregeneration throughput

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test

Pregeneration throughput

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