Optimize vec
and bytes
modules for bytecode size and gas usage
#7162
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Description
This PR mostly optimizes implementations of several traits, like
AbiEncode
,Iterator
,PartialEq
, and methods forVec
andBytes
.One typical common optimization was replacing the internal calls to the public
get
method with a direct element read. Each call to the publicget
in internal implementations of those traits had an overhead of double-checking the boundary and unnecessary wrapping and unwrapping the fetched value.Also, whenever possible
mcp
instruction was used for converting betweenBytes
andVec<u8>
, instead of costly iteration and copying of each element individually.The PR also removes calls to getters in internal implementations to mitigate the issue of inlining of getters explained in #7152.
The bytecode size of the sample script that uses optimized code was reduced for 37.58%, from 2384 bytes to 1488:
Out of 822
in_language_tests
, 303 tests got reduced gas costs, up to 57.75% and in average 18.97%.Click to see improvements in gas costs
Checklist
Breaking*
orNew Feature
labels where relevant.