ErrorGasOptimizations.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.7;

error TooLowValue();

// https://rinkeby.etherscan.io/tx/0x7cb53c1814638d217d8030d24141dd64f97fe557480e9b60b7bcd28af5d87014
// Deploy Cost: 113,341
contract Test  {
    // https://rinkeby.etherscan.io/tx/0x0a4ea95262492b62f83a81970a709c62291d5c575cf522dcb48b9e8e5b399006
    // Failed: 21,473
    // https://rinkeby.etherscan.io/tx/0xb0122a3dc0d6b68bd8f7a0f7a931c61cf6cac5adb52d672a5f9805c89e5223ff
    // Succeeded: 21,184
    function doStuff() public payable {
        require(msg.value > 0, "Too Low Value");
    }
}

// https://rinkeby.etherscan.io/tx/0xd491fa2df760179e24c7f03bd8e2ccd5b2bba8ed54a8f087eb1cded8fbfd60ac
// Deploy Cost: 86,369
contract Test2 {
    // https://rinkeby.etherscan.io/tx/0x7d1e51e8dfcb5bec496a17836cc748a067d233ca8efe436505d6b266b7e70569
    // Failed: 21,219
    // https://rinkeby.etherscan.io/tx/0x48700738dd8138f470cadc2e8e32ccbe1f4172ea18d2068b880e545ce2812733
    // Succeeded: 21,184
    function doOtherStuff() public payable{
        if(msg.value <= 0) {
            revert TooLowValue();
        }
    }
}