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Wtf Gas Optimization

Wtf Gas Optimization is a public repository of Solidity gas-optimization techniques, example contracts, and Foundry tests that report gas use for selected implementations.

Explore the practical guide ↓

Independent OpenViST project profile, based on linked sources.

Wtf Gas Optimization — OpenViST project profile in Developer Tools.
OpenViST project illustration. See the linked sources for product details.
Understand the project

Practical overview

When it fits

Use it while learning Solidity optimization patterns or evaluating a specific implementation choice against the repository’s examples and gas reports.

Who it is for

  • Solidity developers studying gas-related implementation trade-offs.
  • Smart-contract reviewers looking for optimization ideas to assess against their code.

Documented uses

  • Study examples of Solidity gas-optimization techniques.
  • Compare gas reports for alternative implementations in the repository’s Foundry examples.
  • Use the listed techniques as prompts for contract optimization or code review.
Before you choose

Requirements & limits

The repository is public on GitHub.

  • The examples use Foundry and include test commands requesting gas reports.
  • The outline covers 24 techniques, including calldata versus memory, bitmaps, custom errors, storage packing, and mappings versus arrays.
  • Reported gas costs are tied to the repository’s specific examples and should not be treated as universal results.

Check current requirements in the official documentation. Source-based guidance does not mean OpenViST has run or independently tested this project.

Source-based practical guide

Run a Foundry gas-report test for a listed optimization example

Compare gas use for an example in the repository using its documented Foundry test command.

Before you start

  • A Foundry environment capable of running forge test.
  • The repository example and test file for the selected technique.

Steps

  1. Choose a technique section in the README that lists a test command and gas report.

  2. Run the exact forge test --contracts … --gas-report command shown for that section from the repository context.

  3. Review the reported gas costs for the alternatives listed in that section.

Expected outcome

A Foundry gas report for the selected example, with gas costs that can be compared across the listed implementations.

Guide limitations

  • The README provides commands and sample reports only for the examples it lists; it does not establish that results will match in other environments or modified contracts.
  • Gas results alone do not establish that an optimization is safe or suitable for a particular contract.
Documentation 1 ↗
Evidence and transparency

Sources & review

Official repository ↗
Source record details
Source availability
Active
Sources checked
17 October 2026
Original website title
WTFAcademy/WTF-gas-optimization · Official homepage title · retained in its source language
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