cargo-bloat

Find out what takes most of the space in your executable.

Inspired by google/bloaty.

Note: supports ELF (Linux, BSD) and Mach-O (macOS) platforms only.

Install

bash cargo install cargo-bloat

Usage

Get a list of the biggest functions in the release build:

``` % cargo bloat --release -n 10 Finished release [optimized] target(s) in 0.2 secs Analyzing target/release/cargo-bloat

File .text Size Crate Name 36.7% 95.5% 5.3MiB [14430 Others] 0.3% 0.9% 48.8KiB regexsyntax >::parsewit... 0.2% 0.6% 34.2KiB unicodenormalization unicodenormalization::tables::compatibilityfullyde... 0.2% 0.5% 26.2KiB unicodenormalization unicodenormalization::tables::canonicalfullydecomp... 0.2% 0.4% 25.1KiB clap clap::app::parser::Parser::getmatcheswith 0.2% 0.4% 23.0KiB cargo cargo::core::resolver::activatedepsloop 0.1% 0.4% 22.0KiB cargo cargo::util::toml::targets::targets 0.1% 0.4% 20.4KiB toml? as serde::de::Deserial... 0.1% 0.3% 19.1KiB cargo IMPLDESERIALIZEFORTomlProject... 0.1% 0.3% 19.1KiB cargo cargo::core::compiler::context::Context::compile 0.1% 0.3% 17.9KiB cargo IMPLDESERIALIZEFORTomlManifes... 38.5% 100.0% 5.6MiB .text section size, the file size is 14.5MiB ```

Get a list of the biggest dependencies in the release build: ``` % cargo bloat --release --crates -n 10 Finished release [optimized] target(s) in 0.2 secs Analyzing target/release/cargo-bloat

File .text Size Name 11.6% 30.2% 1.7MiB cargo 8.1% 21.2% 1.2MiB std 2.6% 6.7% 385.2KiB toml 2.3% 6.0% 342.4KiB [Unknown] 2.2% 5.7% 322.7KiB libgit2sys 2.0% 5.3% 303.8KiB clap 1.4% 3.6% 207.2KiB regexsyntax 1.1% 2.8% 160.2KiB regex 1.0% 2.6% 148.4KiB goblin 0.9% 2.3% 131.8KiB serde_json 38.5% 100.0% 5.6MiB .text section size, the file size is 14.5MiB

Note: numbers above are a result of guesswork. They are not 100% correct and never will be. ```

Get a list of the biggest functions in the release build filtered by the regexp: ``` % cargo bloat --release --filter '^__' -n 10 Finished release [optimized] target(s) in 0.2 secs Analyzing target/release/cargo-bloat

File .text Size Crate Name 0.0% 0.0% 1.3KiB [25 Others] 0.0% 0.1% 4.7KiB backtracesys _rbtbacktracedwarfadd 0.0% 0.1% 3.0KiB backtracesys _rbtbacktraceqsort 0.0% 0.0% 1000B std _udivmodti4 0.0% 0.0% 565B backtracesys _rbtbacktracesyminfo 0.0% 0.0% 565B backtracesys _rbtbacktracepcinfo 0.0% 0.0% 357B backtracesys _rbtbacktraceinitialize 0.0% 0.0% 219B backtracesys _rbtbacktracegetview 0.0% 0.0% 211B backtracesys _rbtbacktracevectorgrow 0.0% 0.0% 197B backtracesys _rbtbacktracecreatestate 0.0% 0.0% 150B backtracesys _rbtbacktrace_open 0.1% 0.2% 12.2KiB filtered data size, the file size is 14.5MiB ```

Flags specific for the cargo-bloat: --crates Per crate bloatedness --filter <CRATE|REGEXP> Filter functions by crate --split-std Split the 'std' crate to original crates like core, alloc, etc. --full-fn Print full function name with hash values -n <NUM> Number of lines to show, 0 to show all [default: 20] -w, --wide Do not trim long function names

License

cargo-bloat is licensed under the MIT.