DRAFT: precompiles & v28

[mm-zk]

What ❔

Preparation for v28 and precompiles

[github-actions]

Hey there! 👋🏼

We require pull request titles to follow the Conventional Commits specification and it looks like your proposed title needs to be adjusted.
Examples of valid PR titles:

• feat(eth_sender): Support new transaction type
• fix(state_keeper): Correctly handle edge case
• ci: Add new workflow for linting

Details:

Unknown release type "DRAFT" found in pull request title "DRAFT: precompiles & v28". 

Available types:
 - feat: A new feature
 - fix: A bug fix
 - docs: Documentation only changes
 - style: Changes that do not affect the meaning of the code (white-space, formatting, missing semi-colons, etc)
 - refactor: A code change that neither fixes a bug nor adds a feature
 - perf: A code change that improves performance
 - test: Adding missing tests or correcting existing tests
 - build: Changes that affect the build system or external dependencies (example scopes: gulp, broccoli, npm)
 - ci: Changes to our CI configuration files and scripts (example scopes: Travis, Circle, BrowserStack, SauceLabs)
 - chore: Other changes that don't modify src or test files
 - revert: Reverts a previous commit

[perekopskiy]

TODO: should be done when contracts commit is finalized

[perekopskiy]

AFAICT, GEOMETRY_CONFIG wasn't changed for pre-v28 circuits except for cycles_per_log_demuxer, it went from 58750 to 58125. @mm-zk is that expected, was circuit changed indeed? Anyway, it's ok to just update GEOMETRY_CONFIG in place since value decreased, so seal criterion is stricter now.

[github-actions]

Detected VM performance changes

Benchmark name	Est. cycles	Change in est. cycles
deploy_simple_contract/legacy	59353335	+4.9%
init/fast	16164984	+8.3%
init/fast_no_sigs	16199174	+8.3%
init/legacy	2040150	+6.0%

⚠ Detected differing instruction counts

Benchmark	Old count	New count
access_memory	4747741	4746904
call_far	319501	319547
decode_shl_sub	4747846	4746998
deploy_simple_contract	15436	15543
event_spam	2558180	2557773
finish_eventful_frames	785949	785907
heap_read_write	4252268	4251510
slot_hash_collision	4748744	4747918
write_and_decode	4748744	4747918

Changes in number of opcodes executed indicate that the gas price of the benchmark has changed, which causes it to run out of gas at a different time.