Chiapos

Changed

- We made various improvements in error handling to potentially address harvester crashes - especially when moving plots around.

Added

- We now build both MacOS x86_64 and MacOS universal wheels.

Changed

- We reverted to stop using build flags `-mtune=native`. This should speed the plotter up on certain modern CPUs.
- We enhanced performance with changes to BufferedDisk.

Fixed

- When adding bitfield back-sort we broke compatibility with BSD. That is fixed in this release.

Added no bitfield plotting option (-e)

Added

- We now instrument temp space, time, and memory used building two k=27 on ci for performance tracking and comparison one for each back propagation method.

Changed

- We added a `-e` flag to allow you to choose between bitfield back propagation and the original back propagation. This brings performance a little ahead of the Beta 17 plotter release. However bitfield back propagation may perform faster on spinning disk. YMMV.
- More of the sorts in the bitfield sort use uniform sort for better performance.
- This version requires slightly more RAM at each k size.

Fixed

- Previous releases were not deleting temp files as they were no longer needed and therefor temp space needed for a k=32 went from 332 GiB to 499 GiB. This version only needs 332 GiB when using -u 64.
- Beta 17 style back prop had a buck that could occasionally lead to a segfault. We fixed that when using the `-e` flag.

Fixed

- We now close unused file-handles in the temp directory to avoid exceeding rlimit when using the new bitfield backprop and 128 sorting buckets.