Ben Kimock afa1dddcf9 Store protectors outside Item, pack Tag and Perm ...

Previously, Item was a struct of a NonZeroU64, an Option which was
usually unset or irrelevant, and a 4-variant enum. So collectively, the
size of an Item was 24 bytes, but only 8 bytes were used for the most
part.

So this takes advantage of the fact that it is probably impossible to
exhaust the total space of SbTags, and steals 3 bits from it to pack the
whole struct into a single u64. This bit-packing means that we reduce
peak memory usage when Miri goes memory-bound by ~3x. We also get CPU
performance improvements of varying size, because not only are we simply
accessing less memory, we can now compare a Vec<Item> using a memcmp
because it does not have any padding.

2022-07-12 21:01:33 -04:00

..

fail

Store protectors outside Item, pack Tag and Perm

2022-07-12 21:01:33 -04:00

panic

Port all tests

2022-07-08 16:08:32 +00:00

pass

Port all tests

2022-07-08 16:08:32 +00:00

compiletest.rs

Actually use eyre and get rid of the ad-hoc macros emulating error handling

2022-07-08 15:55:37 +00:00