ERC-721 YUL implementation

src/ERC721Yul.sol is an ERC-721 smart contract implemented almost entire inline assembly. It uses a straightforward storage layout and is gas competitive with optimized ERC-721 implementations such as solady and solmate.

src/ERC721.yul is a pure YUL implementation of the same, and is also tested and benchmarked using forge.

Benchmarks

The benchmark file is the test/Benchmark.t.sol forge test file. Actual blockchain transactions may yield different results.

Test	YUL	Inline Assembly	SOLADY	SOLMATE
approve	31730	32299	32442	32458
balanceOf	7534	7760	7797	7899
burn	11636	11553	12152	11969
mint	34798	35206	35293	35565
ownerOf	7588	7657	7792	7801
safeMint	106623	106899	107321	108844
safeTransferFrom	111889	113786	113847	116468
setApprovalForAll	29437	29974	29992	30124
transferFrom	37215	38202	38196	38695

If you know how to improve on this implementation, please make a PR. I'd love to learn.

Usage

Build

$ forge build

Test

$ forge test

Benchmark

$ make benchmark