int-dec-format-tests

Comparison of decimal integers formatting algorithms

mac	linux

Task

Convert vector of integer values to char buffer.

• [input parameters] (https://github.com/ruslo/int-dec-format-tests/blob/d91111b02d64746b8665f08654bde5bf337c5c5d/source/main.cpp#L107)
• run engine
• algorithms

Algorithms

• fmt::FormatInt
• boost::spirit::karma
• alexandrescu
• tmpbuf (no digits counting, no reverse)
• reverse (no digits counting, reverse chars in-situ)
• counting (division free counting algorithm)

Usage

• install boost
• verify correctness:

> cmake -H. -B_builds/make-debug -DCMAKE_BUILD_TYPE=Debug
> cmake --build _builds/make-debug
> (cd _builds/make-debug && ctest -VV)

• run tests:

> cmake -H. -B_builds/make-release -DCMAKE_BUILD_TYPE=Release
> cmake --build _builds/make-release
> (cd _builds/make-release && ctest -VV)

Arch 32-bit build

> cmake -H. -B_builds/make-release -DCMAKE_BUILD_TYPE=Release -DBUILD32=ON
> cmake --build _builds/make-release
> (cd _builds/make-release && ctest -VV)

Options

• Number of iterations can be reduced using -DFAST_TEST=ON option
• If -DLONG_TEST option is ON, number of iterations increased and additional 8Mb test added
• Set Algo*::enabled to false to exclude algorithm from test

Results

• https://github.com/ruslo/int-dec-format-tests/tree/master/results