Gas Cost Comparison: require vs if revert

This project compares the gas consumption of two error handling approaches in Solidity: require with custom error and if revert with custom error.

Project Description

This project implements a comparison between:

1. require + custom error vs if revert + custom error

Both approaches use custom errors (not string errors) for gas efficiency, and we compare the gas cost difference between using require() statement and if revert pattern.

Contract Functions

The GasCost.sol contract contains the following functions:

• setNumberWithRequire(): Uses require(condition, CustomError()) for condition checking with custom error
• setNumberWithIfRevert(): Uses if (condition) revert CustomError() for condition checking with custom error

Both functions validate that:

• newNumber != 0 (reverts with NumberTooSmall() if false)
• newNumber < 1000 (reverts with NumberTooLarge() if false)

Test Coverage

The test file test/GasCost.t.sol includes the following test scenarios:

• Gas consumption comparison when the first condition fails (number too small)
• Gas consumption comparison when the second condition fails (number too large)

Usage

Build

$ forge build

Run Tests

Run all tests:

$ forge test

Run tests with gas report:

$ forge test --gas-report

Run tests with verbose output (including console.log):

$ forge test -vvv

Test Results

Run forge test -vvv to see detailed gas consumption comparison:

$ forge test -vvv

Test Output

[PASS] testCompareFailLarge() (gas: 14529)
Logs:
  === Gas Comparison (Fail - Number Too Large) ===
  Require gas used: 8130
  If revert gas used: 1077
  Difference: 7053

[PASS] testCompareFailSmall() (gas: 14493)
Logs:
  === Gas Comparison (Fail - Number Too Small) ===
  Require gas used: 8106
  If revert gas used: 1053
  Difference: 7053

Suite result: ok. 2 passed; 0 failed; 0 skipped; finished in 4.78ms (3.58ms CPU time)