bb9ce3cb78
Replace mixed `⎿` and `L` prefixes with `└` in TUI rendering. <img width="454" height="659" alt="Screenshot 2025-08-13 at 4 02 03 PM" src="https://github.com/user-attachments/assets/61c9c7da-830b-4040-bb79-a91be90870ca" />
298 lines
11 KiB
Plaintext
298 lines
11 KiB
Plaintext
thinking
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Investigating binary sizes
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I need to check the codex-rs repository to explain why the project's binaries
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are large. The user is likely seeking specifics about the setup: are Rust builds
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static, what features are enabled, and is debug information included? It could
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be due to static linking, included OpenSSL, or how panic handling is set up. I
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should look into the Cargo.toml file to confirm features and profiles without
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needing to edit any code. Let's get started on this!
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codex
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I’m going to scan the workspace and Cargo manifests to see build profiles and
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dependencies that impact binary size. Then I’ll summarize the main causes.
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⚡ Running ls -la
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└ total 6696
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drwxr-xr-x@ 39 easong staff 1248 Aug 9 08:49 .
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drwxr-xr-x@ 29 easong staff 928 Aug 9 08:50 ..
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-rw-r--r--@ 1 easong staff 10244 Aug 8 21:13 .DS_Store
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-rw-r--r--@ 1 easong staff 212 Aug 4 18:49 .gitignore
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… +30 lines
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-rw-r--r--@ 1 easong staff 9971 Aug 8 23:07 simpler.md
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drwxr-xr-x@ 6 easong staff 192 Aug 4 22:40 target
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drwxr-xr-x@ 6 easong staff 192 Aug 7 19:20 tui
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-rw-r--r--@ 1 easong staff 8639 Aug 6 23:30 typewriter.md
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-rw-r--r--@ 1 easong staff 7673 Aug 6 21:58 wrap-plan.md
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⚡ Running sed -n '1,200p' Cargo.toml
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└ [workspace]
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members = [
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"ansi-escape",
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"apply-patch",
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"arg0",
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… +38 lines
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codegen-units = 1
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[patch.crates-io]
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# ratatui = { path = "../../ratatui" }
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ratatui = { git = "https://github.com/nornagon/ratatui", branch =
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"nornagon-v0.29.0-patch" }
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Optimizing Rust Release Profile
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I'm reviewing the workspace's release profile, which has settings like lto=fat,
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strip=symbols, and codegen-units=1 to reduce binary size. However, it seems that
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"strip = symbols" only removes symbols, not debug information. In Rust 1.73+,
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both "symbols" and "debuginfo" stripping options are available. I should check
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whether using these results in a smaller binary. I’ll also skim through crates
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for heavy dependencies in Cargo.toml, including cli, core, exec, linux-sandbox,
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tui, login, ollama, and mcp.
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⚡ Running for d in ansi-escape apply-patch arg0 cli common core exec execpolicy
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file-search linux-sandbox login mcp-client mcp-server mcp-types ollama tui; do
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echo "--- $d/Cargo.toml"; sed -n '1,200p' $d/Cargo.toml; echo; done
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└ --- ansi-escape/Cargo.toml
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[package]
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edition = "2024"
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name = "codex-ansi-escape"
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version = { workspace = true }
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… +237 lines
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"process",
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"rt-multi-thread",
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"signal",
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] }
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tracing = { version
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⚡ Running sed -n '1,200p' execpolicy/Cargo.toml
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└ [package]
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name = "codex-execpolicy"
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version = { workspace = true }
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edition = "2024"
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… +23 lines
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serde_json = "1.0.142"
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serde_with = { version = "3", features = ["macros"] }
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[dev-dependencies]
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tempfile = "3.13.0"
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⚡ Running sed -n '1,200p' file-search/Cargo.toml
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└ [package]
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edition = "2024"
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name = "codex-file-search"
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version = { workspace = true }
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… +11 lines
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ignore = "0.4.23"
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nucleo-matcher = "0.3.1"
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serde = { version = "1", features = ["derive"] }
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serde_json = "1.0.142"
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tokio = { version = "1", features = ["full"] }
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⚡ Running sed -n '1,200p' linux-sandbox/Cargo.toml
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└ [package]
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edition = "2024"
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name = "codex-linux-sandbox"
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version = { workspace = true }
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… +24 lines
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"macros",
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"process",
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"rt-multi-thread",
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"signal",
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] }
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⚡ Running sed -n '1,200p' login/Cargo.toml
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└ [package]
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edition = "2024"
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name = "codex-login"
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version = { workspace = true }
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… +17 lines
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] }
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[dev-dependencies]
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pretty_assertions = "1.4.1"
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tempfile = "3"
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⚡ Running sed -n '1,200p' mcp-client/Cargo.toml
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└ [package]
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name = "codex-mcp-client"
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version = { workspace = true }
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edition = "2024"
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… +13 lines
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"process",
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"rt-multi-thread",
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"sync",
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"time",
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] }
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⚡ Running sed -n '1,200p' mcp-server/Cargo.toml
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└ [package]
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edition = "2024"
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name = "codex-mcp-server"
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version = { workspace = true }
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… +35 lines
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mcp_test_support = { path = "tests/common" }
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pretty_assertions = "1.4.1"
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tempfile = "3"
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tokio-test = "0.4"
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wiremock = "0.6"
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⚡ Running sed -n '1,200p' mcp-types/Cargo.toml
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└ [package]
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edition = "2024"
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name = "mcp-types"
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version = { workspace = true }
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… +1 lines
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workspace = true
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[dependencies]
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serde = { version = "1", features = ["derive"] }
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serde_json = "1"
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⚡ Running sed -n '1,200p' ollama/Cargo.toml
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└ [package]
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edition = "2024"
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name = "codex-ollama"
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version = { workspace = true }
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… +22 lines
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tracing = { version = "0.1.41", features = ["log"] }
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wiremock = "0.6"
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[dev-dependencies]
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tempfile = "3"
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⚡ Running sed -n '1,200p' tui/Cargo.toml
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└ [package]
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edition = "2024"
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name = "codex-tui"
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version = { workspace = true }
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… +74 lines
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chrono = { version = "0.4", features = ["serde"] }
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insta = "1.43.1"
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pretty_assertions = "1"
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rand = "0.8"
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vt100 = "0.16.2"
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⚡ Running sed -n '1,200p' chatgpt/Cargo.toml
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└ [package]
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edition = "2024"
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name = "codex-chatgpt"
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version = { workspace = true }
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… +11 lines
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serde_json = "1"
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tokio = { version = "1", features = ["full"] }
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[dev-dependencies]
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tempfile = "3"
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thinking
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Considering binary size impacts
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I’m evaluating how binary size is influenced by various factors. There are many
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binaries, such as codex and codex-exec, which include dependencies by default,
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pulling in features like Tokio and hyper. For instance, reqwest includes
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default features like TLS through rustls. If default features remain enabled,
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it inflates the size with many additional components. I notice that for musl
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targets, using vendored builds of OpenSSL could significantly increase binary
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size. This is quite the intricate web of dependencies!
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Analyzing musl and binary size
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I’m considering the implications of building for musl with static linking.
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In this case, OpenSSL might come into play through some crates, but reqwest
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defaults to using rustls, although openssl-sys vendored could increase binary
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size. It’s interesting to think about whether they’re targeting musl, especially
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since it seems they might often be building for Mac and Linux with dynamic
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linking instead.
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I also realize there’s a difference between debug and release builds — release
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should be smaller due to optimizations, but if they’re defaulting to debug
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builds, that could lead to much larger binaries.
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Assessing crate impacts on size
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I need to be precise when analyzing binary sizes from various crates. Some
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crates, like ratatui-image, include heavy features such as libjpeg decoders,
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which can really bulk things up. Then there are the tree-sitter crates that
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contain large static grammar tables, adding significant size. The starlark crate
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and tracing-subscriber also contribute to size increases.
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With static linking per binary being standard in Rust, it leads to multiple
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copies of the same dependencies unless cdylibs are used. That makes the compile
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times longer, but using LTO helps reduce bloat somewhat through deduplication.
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Evaluating binary size factors
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Having multiple binaries indeed increases the overall size significantly.
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I'm considering options like upgrading to "opt-level = 'z'" or using
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"strip=debuginfo" for reducing size. It's interesting that while the profile
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only sets symbols for stripping, not debuginfo, this could inflate sizes if
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retained in release builds.
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The distinction between "symbols" and "debuginfo" is critical; "symbols" keeps
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debug information which may not align with the goal of minimizing size. I’d like
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to verify with the Rust documentation, but my network access is restricted.
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Explaining large binary sizes
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I’m analyzing why binaries in this project are so large. The primary reasons
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include monolithic static linking, where each binary includes the full
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dependency graph without shared libraries. Heavy dependencies such as reqwest,
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hyper, and TLS components also contribute significantly to size, along with
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image decoders and other libraries.
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Using MUSL targets means vendored OpenSSL can drastically increase the size due
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to static linking. Furthermore, if the release profile keeps debug information
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due to using "strip = symbols," that can lead to larger binaries as well. It’s a
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mix of several factors, including panic strategies and platform-specific linking
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behavior.
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Identifying binary size contributors
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I’m considering why binaries are still large even without static linking. The
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tracing-subscriber crate potentially adds weight because it includes regex,
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though it can sometimes use a lighter version. References from files like "core/
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Cargo.toml" show dependencies like reqwest and tokio, while the tui uses the
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image crate.
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To present this clearly, I’ll format the final answer with two main sections:
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"Main Causes" and "Build-Mode Notes." I can also include brief suggestions for
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reducing size, but I want to stay focused on answering the user's question.
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codex
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Here’s what’s driving size in this workspace’s binaries.
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Main Causes
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- Static linking style: Each bin (codex, codex-tui, codex-exec,
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codex-mcp-server, etc.) statically links its full dependency graph, so common
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code isn’t shared at runtime across executables.
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- Heavy deps (HTTP/TLS): reqwest brings in Hyper, HTTP/2, compressors, and a TLS
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stack (rustls by default; OpenSSL on musl). In core, login, tui, and ollama you
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enable reqwest with json/stream, which still pulls a large transitive set.
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- Image/terminal stack: codex-tui includes image (with jpeg), ratatui,
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crossterm, and ratatui-image, which together contribute significant code size
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(decoders, pixel ops, terminal backends).
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- Parsers/VMs: tree-sitter + tree-sitter-bash (in core and apply-patch) and
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starlark (in execpolicy) include sizeable parser/VM tables and runtimes.
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- Tokio runtime: Broad tokio features (rt-multi-thread, macros, process, signal)
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across many crates inflate code size even if only subsets are used per bin.
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- Panic + backtraces: Default panic = unwind and backtrace support keep
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unwinding tables and symbols that add weight.
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- Per-target OpenSSL (musl): For *-unknown-linux-musl, core enables openssl-sys
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with vendored, compiling OpenSSL into the binary—this adds multiple megabytes
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per executable.
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Build-Mode Notes
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- Release settings: You use lto = "fat" and codegen-units = 1 (good for size),
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but strip = "symbols" keeps debuginfo. Debuginfo is often the largest single
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contributor; if you build in release with that setting, binaries can still be
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large.
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- Debug builds: cargo build (dev profile) includes full debuginfo, no LTO, and
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assertions—outputs are much larger than cargo build --release.
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If you want, I can outline targeted trims (e.g., strip = "debuginfo", opt-level
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= "z", panic abort, tighter tokio/reqwest features) and estimate impact per
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binary. |