Au-lit

msvc results:

ns/op	op/s	err%	total	Random u32 to base 10. w/ /utf-8
2.71	369,270,304.57	1.4%	0.00	null, i.e. the rng perf
6.98	143,213,409.65	1.6%	0.00	jeaiii::to_text
9.63	103,842,159.92	0.4%	0.01	fmt::format_int
21.46	46,606,363.07	2.0%	0.01	std::to_string
21.56	46,372,782.63	1.1%	0.01	std::to_chars
54.56	18,329,649.17	1.0%	0.03	std::sprintf
576.23	1,735,415.94	0.8%	0.35	std::ostringstream

Au-lit

Please avoid

always (unless you have reeeally good reasons)

• std::bind
• std::function
• std::type_info
• std::vector<bool>
• va_*
• std::valarray
• std::list
• assert (instead use a thrower version / contracts)

Au-lit

A "simple" C++ function for random values : uniform_random_value()

To use uniform_random_value() include/paste the header random_value.hpp from this gist in your project; you can after simply write :

int randomInt = uniform_random_value(1, 100);
float randomFloat = uniform_random_value(1.0f, 100.0f);
double randomDouble = uniform_random_value(1.0, 100.0);

For the instance where you want a random boolean you can write :

Au-lit

// © Copyright 2021 Ollivier Roberge
#ifndef IS_CHAR_IMPL
#define IS_CHAR_IMPL

#include <type_traits>

template<typename T> struct is_char : std::false_type {};
template<> struct is_char<char> : std::true_type {};
template<> struct is_char<wchar_t> : std::true_type {};