Chunksmith

A pre-gen that auto-paused could never start again on a modest machine, and said nothing at all while it sat there. Reported on mod_support #33: a run stopped at 5.08% with the CPU idle and "no warnings, no errors, nothing" in the log. 4.3.1 fixed a different bug in the same area -- it stopped a stopped run being RECORDED as finished -- and did not touch the stop itself.

Server operators: two of these change behaviour on a healthy dedicated server too, not only on a weak client. An auto-pause now ends in seconds rather than minutes, and a struggling run narrows its dispatch width below 8 where it previously stopped instead.

Fixed

• A paused pre-gen could not resume on a machine whose tick cost exceeds 55ms. The resume test was two hard-coded numbers -- mspt <= 55 and heap < 70 -- while the PAUSE side is entirely relative: heap from throttleMaxHeapPercent, and tick from the adaptive TickBudget target, which is allowed as high as the 150ms ceiling. The two sides were answering different questions, so on any machine whose own baseline tick cost is above ~55ms the resume condition was unreachable by construction. Stopping even made it LOOK further away than it was: once dispatch halts, the baseline re-learns what the machine costs on its own and the effective target rises to meet it -- the run has become sustainable -- while the fixed 55ms test keeps asking the machine to be faster than it has ever been. Both arms now use the pause side's own references.
• A pause could not be short even in principle. Pausing and resuming shared one grace setting, 120 seconds by default. That patience is right on the way IN, where it stops an autosave killing a healthy run, and wrong on the way OUT, where it costs the whole run. The resume side now has its own grace, capped at 5 seconds.
• Auto-pause fired while there was still room to simply slow down. It triggered on elapsed time alone, with no test for whether narrowing had been tried. It now requires the dispatch width to be at its minimum first, and the width can fall below the comfort floor of 8, one step at a time, before stopping is considered at all. A resumed run reopens at half the width that failed rather than climbing straight back into the wall it was stopped by.
• The whole mechanism was silent. Every notice auto-pause had went to the console sender -- a chat channel, not the log -- so on a client-hosted world nothing was written down anywhere, and a stop was indistinguishable from a hang. It now logs the countdown starting, the countdown being cancelled by a recovery, the pause (with the condition that tripped it, the tick and heap numbers behind the decision, and the percentage it stopped at), and the resume.

Changed

• The LOD auto-enable notice was telling operators its cost was zero. It printed "~5.8 KB/chunk; measured cost to pregen speed: none". Measured on one machine, same heap, same radius, virgin ground per arm: 108.5 chunks/sec with LOD off against 50.6 with it on, and about 12 KB/chunk of store rather than 5.8. LOD generation roughly halves pre-gen throughput. The notice now says so. Nothing about LOD itself changed -- only the claim made about it. This also explains why a dedicated server pre-gens slower than a client: LOD auto-enables on a dedicated server and stays off on a client.