solidity/test/libsolidity/semanticTests/array/byte_array_storage_layout.sol

contract c {
    bytes data;
    function test_short() public returns (uint256 r) {
        assembly {
            sstore(data.slot, 0)
        }
        for (uint8 i = 0; i < 15; i++) {
            data.push(bytes1(i));
        }
        assembly {
            r := sload(data.slot)
        }
    }

    function test_long() public returns (uint256 r) {
        assembly {
            sstore(data.slot, 0)
        }
        for (uint8 i = 0; i < 33; i++) {
            data.push(bytes1(i));
        }
        assembly {
            r := sload(data.slot)
        }
    }

    function test_pop() public returns (uint256 r) {
        assembly {
            sstore(data.slot, 0)
        }
        for (uint8 i = 0; i < 32; i++) {
            data.push(bytes1(i));
        }
        data.pop();
        data.pop();
        assembly {
            r := sload(data.slot)
        }
    }
}
// ====
// compileViaYul: also
// ----
// storage: empty
// test_short() -> 1780731860627700044960722568376587075150542249149356309979516913770823710
// gas legacy: 110938
// gas legacyOptimized: 109706
// storage: nonempty
// test_long() -> 67
// gas irOptimized: 134698
// gas legacy: 213590
// gas legacyOptimized: 211044
// storage: nonempty
// test_pop() -> 1780731860627700044960722568376592200742329637303199754547598369979433020
// gas legacy: 176030
// gas legacyOptimized: 173504
// storage: nonempty