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Adam Perry @ OpenAI
f97d5c3275
## Why Fat LTO makes release builds substantially slower without providing enough measured runtime benefit to justify the release CI long pole. The build-profile investigation found that keeping Cargo's default release `opt-level=3` and switching from fat LTO to ThinLTO (`3/thin/1`) reduced a clean `codex-cli` release build from 2073.893 seconds to 1243.172 seconds, a 40.06% improvement. The resulting binary increased from 196.7 MiB to 211.8 MiB (+7.63%). Measured runtime changes were small: the worst image workload median was +0.86% and app-server startup was +0.31% relative to fat LTO. ThinLTO retains cross-crate optimization while avoiding most of the fat-LTO build cost. This deliberately avoids global size optimization: final-executable testing showed a substantial regression on the image request path, which is expected to become more important as image usage grows. ## What changed - Set the workspace release profile to `lto = "thin"`, retaining Cargo's default release `opt-level=3`. - Remove release and CI workflow-specific LTO overrides so release-profile builds consistently use the workspace setting. - Remove the now-unused Windows release workflow input and related diagnostic output. ## Validation - Confirmed the release profile parses with `cargo metadata --no-deps --format-version 1`. - CI validates release builds across the supported target matrix.
f97d5c3275
·
2026-06-04 20:07:53 +00:00
7,142 Commits
Codex CLI is a coding agent from OpenAI that runs locally on your computer.
If you want Codex in your code editor (VS Code, Cursor, Windsurf), install in your IDE.
If you want the desktop app experience, run
codex app or visit the Codex App page.
If you are looking for the cloud-based agent from OpenAI, Codex Web, go to chatgpt.com/codex.
Quickstart
Installing and running Codex CLI
Run the following on Mac or Linux to install Codex CLI:
curl -fsSL https://chatgpt.com/codex/install.sh | sh
Run the following on Windows to install Codex CLI:
powershell -ExecutionPolicy ByPass -c "irm https://chatgpt.com/codex/install.ps1 | iex"
Codex CLI can also be installed via the following package managers:
# Install using npm
npm install -g @openai/codex
# Install using Homebrew
brew install --cask codex
Then simply run codex to get started.
You can also go to the latest GitHub Release and download the appropriate binary for your platform.
Each GitHub Release contains many executables, but in practice, you likely want one of these:
- macOS
- Apple Silicon/arm64:
codex-aarch64-apple-darwin.tar.gz - x86_64 (older Mac hardware):
codex-x86_64-apple-darwin.tar.gz
- Apple Silicon/arm64:
- Linux
- x86_64:
codex-x86_64-unknown-linux-musl.tar.gz - arm64:
codex-aarch64-unknown-linux-musl.tar.gz
- x86_64:
Each archive contains a single entry with the platform baked into the name (e.g., codex-x86_64-unknown-linux-musl), so you likely want to rename it to codex after extracting it.
Using Codex with your ChatGPT plan
Run codex and select Sign in with ChatGPT. We recommend signing into your ChatGPT account to use Codex as part of your Plus, Pro, Business, Edu, or Enterprise plan. Learn more about what's included in your ChatGPT plan.
You can also use Codex with an API key, but this requires additional setup.
Docs
This repository is licensed under the Apache-2.0 License.