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

File .text Size Crate Name 0.0% 0.0% 0B [14819 Others] 0.3% 0.8% 48.6KiB regexsyntax >::parsewit... 0.3% 0.7% 43.8KiB regexsyntax >::parsewit... 0.2% 0.6% 34.2KiB unicodenormalization unicodenormalization::tables::compatibilityfullyde... 0.2% 0.4% 26.2KiB unicodenormalization unicodenormalization::tables::canonicalfullydecomp... 0.2% 0.4% 24.6KiB clap clap::app::parser::Parser::getmatcheswith 0.2% 0.4% 24.5KiB cargo cargo::core::resolver::activatedepsloop 0.1% 0.4% 21.4KiB toml? as serde::de::Deserial... 0.1% 0.3% 20.5KiB cargo cargo::util::toml::targets::targets 0.1% 0.3% 17.9KiB goblin command::CommandVariant as scroll... 0.1% 0.3% 17.7KiB cargo IMPLDESERIALIZEFORTomlManifes... 0.1% 0.3% 17.6KiB cargo IMPLDESERIALIZEFOR_TomlProject... 38.6% 100.0% 5.8MiB .text section size, the file size is 14.9MiB ```

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

File .text Size Name 10.8% 27.9% 1.6MiB cargo 7.7% 20.1% 1.2MiB std 2.8% 7.1% 420.5KiB regexsyntax 2.5% 6.6% 386.5KiB toml 2.3% 5.8% 344.1KiB [Unknown] 2.0% 5.3% 310.8KiB libgit2sys 2.0% 5.1% 303.4KiB clap 1.7% 4.4% 260.8KiB regex 1.1% 2.8% 165.7KiB goblin 0.6% 1.4% 84.1KiB serde_json 38.6% 100.0% 5.8MiB .text section size, the file size is 14.9MiB

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

File .text Size Crate Name 0.0% 0.0% 0B [20 Others] 0.0% 0.1% 6.8KiB backtracesys _rbtbacktracedwarfadd 0.0% 0.1% 4.2KiB backtracesys _rbtbacktraceqsort 0.0% 0.0% 575B backtracesys _rbtbacktracesyminfo 0.0% 0.0% 559B backtracesys _rbtbacktracepcinfo 0.0% 0.0% 357B backtracesys _rbtbacktraceinitialize 0.0% 0.0% 216B backtracesys _rbtbacktracegetview 0.0% 0.0% 200B backtracesys _rbtbacktracecreatestate 0.0% 0.0% 193B backtracesys _rbtbacktracevectorgrow 0.0% 0.0% 158B backtracesys _rbtbacktraceopen 0.0% 0.0% 156B std _ruststartpanic 0.0% 0.0% 132B std _rustmaybecatch_panic 0.1% 0.2% 14.5KiB filtered data size, the file size is 14.9MiB ```

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.