Add a perf-sanity test

This commit is contained in:
Victor Zverovich 2024-07-14 14:17:39 -07:00
parent f29a7e7970
commit e10643add2
2 changed files with 30 additions and 1 deletions

View File

@ -110,6 +110,9 @@ add_fmt_test(enforce-checks-test)
target_compile_definitions(enforce-checks-test PRIVATE
-DFMT_ENFORCE_COMPILE_STRING)
add_executable(perf-sanity perf-sanity.cc)
target_link_libraries(perf-sanity fmt::fmt)
if (FMT_MODULE)
# The tests need {fmt} to be compiled as traditional library
# because of visibility of implementation details.
@ -233,7 +236,7 @@ if (FMT_PEDANTIC AND NOT WIN32 AND NOT (
"-DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}")
endif ()
# This test are disabled on Windows because it is only *NIX issue.
# This test is disabled on Windows because it is POSIX-specific.
if (FMT_PEDANTIC AND NOT WIN32)
add_test(static-export-test ${CMAKE_CTEST_COMMAND}
-C ${CMAKE_BUILD_TYPE}

26
test/perf-sanity.cc Normal file
View File

@ -0,0 +1,26 @@
// A quick and dirty performance test.
// For actual benchmarks see https://github.com/fmtlib/format-benchmark.
#include <atomic>
#include <chrono>
#include <iterator>
#include "fmt/format.h"
int main() {
const int n = 10000000;
auto start = std::chrono::steady_clock::now();
for (int iteration = 0; iteration < n; ++iteration) {
auto buf = fmt::memory_buffer();
fmt::format_to(std::back_inserter(buf),
"Hello, {}. The answer is {} and {}.", 1, 2345, 6789);
}
std::atomic_signal_fence(std::memory_order_acq_rel); // Clobber memory.
auto end = std::chrono::steady_clock::now();
std::chrono::duration<double> duration = end - start;
double total_time = duration.count() * 1000; // Convert to milliseconds.
fmt::print("Total time for formatting {} strings: {:.1f} ms.\n", n,
total_time);
}