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Most gas efficient way to check if byte array contains zeroes?

I have a contract that I pass data packed into an array of uint256 (as it's apparently cheaper to use uint256 over bytes32) and each byte in the uint256 contains positions referencing another array of … At the moment I am iterating through each byte in the array, masking and shifting, which gets the job done: function check32PositionGroupForZeroes(uint256 toCheck) public pure returns (uint256 amountOfZeroes …
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