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Merged
jaja360 merged 4 commits into from
Feb 4, 2026
+31 −24
Merged

updating fmt to version 12 and use compile-time format strings #51

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7f71f12
updating fmt
lemire Feb 2, 2026
502211a
removing g
lemire Feb 2, 2026
1f77c2f
add algo version numbers in benchmark results
jaja360 Feb 3, 2026
c6bccbb
Merge branch 'master' into update_fmt
lemire Feb 4, 2026
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53 changes: 30 additions & 23 deletions benchmarks/algorithms.h
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,9 @@
#include <gdtoa.h> // Netlib
#endif

#include <fmt/format.h>
#include <fmt/compile.h>
#include <array>
#include <span>

#include <fmt/format.h>
Expand Down Expand Up @@ -286,7 +289,9 @@ int to_string(T d, std::span<char>& buffer) {

template<arithmetic_float T>
int fmt_format(T d, std::span<char>& buffer) {
const auto it = fmt::format_to(buffer.data(), "{}", d);
// FMT_COMPILE is a macro provided by the {fmt} library that tells the library to fully process
// a format string at compile time rather than at runtime.
const auto it = fmt::format_to(buffer.data(), FMT_COMPILE("{}"), d);
return std::distance(buffer.data(), it);
}

Expand Down Expand Up @@ -520,27 +525,29 @@ int snprintf(T d, std::span<char>& buffer) {

template<arithmetic_float T>
int fmt_format(T d, std::span<char>& buffer) {
// FMT_COMPILE is a macro provided by the {fmt} library that tells the library to fully process
// a format string at compile time rather than at runtime.
switch(BenchArgs<T>::fixedSize) {
case 0: return fmt::format_to(buffer.data(), "{}", d) - buffer.data();
case 1: return fmt::format_to(buffer.data(), "{:.1g}", d) - buffer.data();
case 2: return fmt::format_to(buffer.data(), "{:.2g}", d) - buffer.data();
case 3: return fmt::format_to(buffer.data(), "{:.3g}", d) - buffer.data();
case 4: return fmt::format_to(buffer.data(), "{:.4g}", d) - buffer.data();
case 5: return fmt::format_to(buffer.data(), "{:.5g}", d) - buffer.data();
case 6: return fmt::format_to(buffer.data(), "{:.6g}", d) - buffer.data();
case 7: return fmt::format_to(buffer.data(), "{:.7g}", d) - buffer.data();
case 8: return fmt::format_to(buffer.data(), "{:.8g}", d) - buffer.data();
case 9: return fmt::format_to(buffer.data(), "{:.9g}", d) - buffer.data();
case 10: return fmt::format_to(buffer.data(), "{:.10g}", d) - buffer.data();
case 11: return fmt::format_to(buffer.data(), "{:.11g}", d) - buffer.data();
case 12: return fmt::format_to(buffer.data(), "{:.12g}", d) - buffer.data();
case 13: return fmt::format_to(buffer.data(), "{:.13g}", d) - buffer.data();
case 14: return fmt::format_to(buffer.data(), "{:.14g}", d) - buffer.data();
case 15: return fmt::format_to(buffer.data(), "{:.15g}", d) - buffer.data();
case 16: return fmt::format_to(buffer.data(), "{:.16g}", d) - buffer.data();
case 17: return fmt::format_to(buffer.data(), "{:.17g}", d) - buffer.data();
case 0: return fmt::format_to(buffer.data(), FMT_COMPILE("{}"), d) - buffer.data();
case 1: return fmt::format_to(buffer.data(), FMT_COMPILE("{:.1}"), d) - buffer.data();
case 2: return fmt::format_to(buffer.data(), FMT_COMPILE("{:.2}"), d) - buffer.data();
case 3: return fmt::format_to(buffer.data(), FMT_COMPILE("{:.3}"), d) - buffer.data();
case 4: return fmt::format_to(buffer.data(), FMT_COMPILE("{:.4}"), d) - buffer.data();
case 5: return fmt::format_to(buffer.data(), FMT_COMPILE("{:.5}"), d) - buffer.data();
case 6: return fmt::format_to(buffer.data(), FMT_COMPILE("{:.6}"), d) - buffer.data();
case 7: return fmt::format_to(buffer.data(), FMT_COMPILE("{:.7}"), d) - buffer.data();
case 8: return fmt::format_to(buffer.data(), FMT_COMPILE("{:.8}"), d) - buffer.data();
case 9: return fmt::format_to(buffer.data(), FMT_COMPILE("{:.9}"), d) - buffer.data();
case 10: return fmt::format_to(buffer.data(), FMT_COMPILE("{:.10}"), d) - buffer.data();
case 11: return fmt::format_to(buffer.data(), FMT_COMPILE("{:.11}"), d) - buffer.data();
case 12: return fmt::format_to(buffer.data(), FMT_COMPILE("{:.12}"), d) - buffer.data();
case 13: return fmt::format_to(buffer.data(), FMT_COMPILE("{:.13}"), d) - buffer.data();
case 14: return fmt::format_to(buffer.data(), FMT_COMPILE("{:.14}"), d) - buffer.data();
case 15: return fmt::format_to(buffer.data(), FMT_COMPILE("{:.15}"), d) - buffer.data();
case 16: return fmt::format_to(buffer.data(), FMT_COMPILE("{:.16}"), d) - buffer.data();
case 17: return fmt::format_to(buffer.data(), FMT_COMPILE("{:.17}"), d) - buffer.data();
default:
return fmt::format_to(buffer.data(), "{:.17g}", d) - buffer.data();
return fmt::format_to(buffer.data(), FMT_COMPILE("{:.17}"), d) - buffer.data();
}
}

Expand Down Expand Up @@ -607,13 +614,13 @@ std::vector<BenchArgs<T>> initArgs(bool use_errol = false, size_t repeat = 0, si
args.emplace_back("dragon4" , wrap(s::dragon4<T>) , true , 10);
args.emplace_back("netlib" , wrap(s::netlib<T>) , NETLIB_SUPPORTED && std::is_same_v<T, double> , 10);
args.emplace_back("errol3" , wrap(s::errol3<T>) , ERROL_SUPPORTED && use_errol);
args.emplace_back("fmt_format" , wrap(s::fmt_format<T>) , true);
args.emplace_back("fmt_format 12.1.0" , wrap(s::fmt_format<T>) , true);
// args.emplace_back("grisu2" , wrap(s::grisu2<T>) , std::is_same_v<T, double>);
args.emplace_back("grisu3" , wrap(s::grisu3<T>) , std::is_same_v<T, double>);
args.emplace_back("grisu_exact" , wrap(s::grisu_exact<T>) , true);
args.emplace_back("schubfach" , wrap(s::schubfach<T>) , true);
args.emplace_back("dragonboxlm" , wrap(s::dragonboxlm<T>) , true);
args.emplace_back("dragonbox" , wrap(s::dragonbox<T>) , true);
args.emplace_back("dragonbox 1.1.3" , wrap(s::dragonbox<T>) , true);
args.emplace_back("ryu" , wrap(s::ryu<T>) , true);
args.emplace_back("teju_jagua" , wrap(s::teju_jagua<T>) , true);
args.emplace_back("double_conversion" , wrap(s::double_conversion<T>) , true);
Expand All @@ -632,7 +639,7 @@ std::vector<BenchArgs<T>> initArgs(bool use_errol = false, size_t repeat = 0, si
args.emplace_back("netlib" , wrap(f::netlib<T>) , NETLIB_SUPPORTED , 10);
args.emplace_back("abseil" , wrap(f::abseil<T>) , ABSEIL_SUPPORTED);
args.emplace_back("snprintf" , wrap(f::snprintf<T>) , true);
args.emplace_back("fmt_format" , wrap(f::fmt_format<T>) , true);
args.emplace_back("fmt_format 12.1.0" , wrap(f::fmt_format<T>) , true);
args.emplace_back("ryu" , wrap(f::ryu<T>) , std::is_same_v<T, double>);
args.emplace_back("double_conversion" , wrap(f::double_conversion<T>) , true);
args.emplace_back("std::to_chars" , wrap(f::std_to_chars<T>) , TO_CHARS_SUPPORTED);
Expand Down
2 changes: 1 addition & 1 deletion dependencies/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -167,7 +167,7 @@ target_include_directories(dragon_schubfach_lib PUBLIC
${drachennest_SOURCE_DIR}/src
)

CPMAddPackage("gh:fmtlib/fmt#11.1.4")
CPMAddPackage("gh:fmtlib/fmt#12.1.0")
CPMAddPackage(
GITHUB_REPOSITORY jarro2783/cxxopts
VERSION 3.2.0
Expand Down