[ot][spam][crazy] log: append-only random-access data

[Undiscussed Horrific Abuse, One Victim of Many]

stable first version:
https://lists.cpunks.org/pipermail/cypherpunks/2022-July/102291.html

attached appears to have comparable performance to first version. i tried
to implement all the same approaches (did not check for certain), except
without all the O(n) simplifications and updating the index every write to
help decide when to flush. I noticed the branch merging code is never hit,
should try to figure out what data would make it get used or if it is
redundant or has a further mistake.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: text/html
Size: 673 bytes
Desc: not available
URL: <https://lists.cpunks.org/pipermail/cypherpunks/attachments/20220712/6a417244/attachment.txt>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: thinking_of_2b.py
Type: text/x-python
Size: 9652 bytes
Desc: not available
URL: <https://lists.cpunks.org/pipermail/cypherpunks/attachments/20220712/6a417244/attachment.py>