// Benchmark for Python.
#include "benchmark/benchmark.h"
#include "nanobind/nanobind.h"
#include "nanobind/operators.h"
#include "nanobind/stl/bind_map.h"
#include "nanobind/stl/string.h"
#include "nanobind/stl/vector.h"
NB_MAKE_OPAQUE(benchmark::UserCounters);
namespace {
namespace nb = nanobind;
std::vector<std::string> Initialize(const std::vector<std::string>& argv) {
// The `argv` pointers here become invalid when this function returns, but
// benchmark holds the pointer to `argv[0]`. We create a static copy of it
// so it persists, and replace the pointer below.
static std::string executable_name(argv[0]);
std::vector<char*> ptrs;
ptrs.reserve(argv.size());
for (auto& arg : argv) {
ptrs.push_back(const_cast<char*>(arg.c_str()));
}
ptrs[0] = const_cast<char*>(executable_name.c_str());
int argc = static_cast<int>(argv.size());
benchmark::Initialize(&argc, ptrs.data());
std::vector<std::string> remaining_argv;
remaining_argv.reserve(argc);
for (int i = 0; i < argc; ++i) {
remaining_argv.emplace_back(ptrs[i]);
}
return remaining_argv;
}
benchmark::internal::Benchmark* RegisterBenchmark(const std::string& name,
nb::callable f) {
return benchmark::RegisterBenchmark(
name, [f](benchmark::State& state) { f(&state); });
}
NB_MODULE(_benchmark, m) {
using benchmark::TimeUnit;
nb::enum_<TimeUnit>(m, "TimeUnit")
.value("kNanosecond", TimeUnit::kNanosecond)
.value("kMicrosecond", TimeUnit::kMicrosecond)
.value("kMillisecond", TimeUnit::kMillisecond)
.value("kSecond", TimeUnit::kSecond)
.export_values();
using benchmark::BigO;
nb::enum_<BigO>(m, "BigO")
.value("oNone", BigO::oNone)
.value("o1", BigO::o1)
.value("oN", BigO::oN)
.value("oNSquared", BigO::oNSquared)
.value("oNCubed", BigO::oNCubed)
.value("oLogN", BigO::oLogN)
.value("oNLogN", BigO::oNLogN)
.value("oAuto", BigO::oAuto)
.value("oLambda", BigO::oLambda)
.export_values();
using benchmark::internal::Benchmark;
nb::class_<Benchmark>(m, "Benchmark")
// For methods returning a pointer to the current object, reference
// return policy is used to ask nanobind not to take ownership of the
// returned object and avoid calling delete on it.
// https://pybind11.readthedocs.io/en/stable/advanced/functions.html#return-value-policies
//
// For methods taking a const std::vector<...>&, a copy is created
// because a it is bound to a Python list.
// https://pybind11.readthedocs.io/en/stable/advanced/cast/stl.html
.def("unit", &Benchmark::Unit, nb::rv_policy::reference)
.def("arg", &Benchmark::Arg, nb::rv_policy::reference)
.def("args", &Benchmark::Args, nb::rv_policy::reference)
.def("range", &Benchmark::Range, nb::rv_policy::reference,
nb::arg("start"), nb::arg("limit"))
.def("dense_range", &Benchmark::DenseRange,
nb::rv_policy::reference, nb::arg("start"),
nb::arg("limit"), nb::arg("step") = 1)
.def("ranges", &Benchmark::Ranges, nb::rv_policy::reference)
.def("args_product", &Benchmark::ArgsProduct,
nb::rv_policy::reference)
.def("arg_name", &Benchmark::ArgName, nb::rv_policy::reference)
.def("arg_names", &Benchmark::ArgNames,
nb::rv_policy::reference)
.def("range_pair", &Benchmark::RangePair,
nb::rv_policy::reference, nb::arg("lo1"), nb::arg("hi1"),
nb::arg("lo2"), nb::arg("hi2"))
.def("range_multiplier", &Benchmark::RangeMultiplier,
nb::rv_policy::reference)
.def("min_time", &Benchmark::MinTime, nb::rv_policy::reference)
.def("min_warmup_time", &Benchmark::MinWarmUpTime,
nb::rv_policy::reference)
.def("iterations", &Benchmark::Iterations,
nb::rv_policy::reference)
.def("repetitions", &Benchmark::Repetitions,
nb::rv_policy::reference)
.def("report_aggregates_only", &Benchmark::ReportAggregatesOnly,
nb::rv_policy::reference, nb::arg("value") = true)
.def("display_aggregates_only", &Benchmark::DisplayAggregatesOnly,
nb::rv_policy::reference, nb::arg("value") = true)
.def("measure_process_cpu_time", &Benchmark::MeasureProcessCPUTime,
nb::rv_policy::reference)
.def("use_real_time", &Benchmark::UseRealTime,
nb::rv_policy::reference)
.def("use_manual_time", &Benchmark::UseManualTime,
nb::rv_policy::reference)
.def(
"complexity",
(Benchmark * (Benchmark::*)(benchmark::BigO)) & Benchmark::Complexity,
nb::rv_policy::reference,
nb::arg("complexity") = benchmark::oAuto);
using benchmark::Counter;
nb::class_<Counter> py_counter(m, "Counter");
nb::enum_<Counter::Flags>(py_counter, "Flags")
.value("kDefaults", Counter::Flags::kDefaults)
.value("kIsRate", Counter::Flags::kIsRate)
.value("kAvgThreads", Counter::Flags::kAvgThreads)
.value("kAvgThreadsRate", Counter::Flags::kAvgThreadsRate)
.value("kIsIterationInvariant", Counter::Flags::kIsIterationInvariant)
.value("kIsIterationInvariantRate",
Counter::Flags::kIsIterationInvariantRate)
.value("kAvgIterations", Counter::Flags::kAvgIterations)
.value("kAvgIterationsRate", Counter::Flags::kAvgIterationsRate)
.value("kInvert", Counter::Flags::kInvert)
.export_values()
.def(nb::self | nb::self);
nb::enum_<Counter::OneK>(py_counter, "OneK")
.value("kIs1000", Counter::OneK::kIs1000)
.value("kIs1024", Counter::OneK::kIs1024)
.export_values();
py_counter
.def(nb::init<double, Counter::Flags, Counter::OneK>(),
nb::arg("value") = 0., nb::arg("flags") = Counter::kDefaults,
nb::arg("k") = Counter::kIs1000)
.def("__init__", ([](Counter *c, double value) { new (c) Counter(value); }))
.def_rw("value", &Counter::value)
.def_rw("flags", &Counter::flags)
.def_rw("oneK", &Counter::oneK)
.def(nb::init_implicit<double>());
nb::implicitly_convertible<nb::int_, Counter>();
nb::bind_map<benchmark::UserCounters>(m, "UserCounters");
using benchmark::State;
nb::class_<State>(m, "State")
.def("__bool__", &State::KeepRunning)
.def_prop_ro("keep_running", &State::KeepRunning)
.def("pause_timing", &State::PauseTiming)
.def("resume_timing", &State::ResumeTiming)
.def("skip_with_error", &State::SkipWithError)
.def_prop_ro("error_occurred", &State::error_occurred)
.def("set_iteration_time", &State::SetIterationTime)
.def_prop_rw("bytes_processed", &State::bytes_processed,
&State::SetBytesProcessed)
.def_prop_rw("complexity_n", &State::complexity_length_n,
&State::SetComplexityN)
.def_prop_rw("items_processed", &State::items_processed,
&State::SetItemsProcessed)
.def("set_label", &State::SetLabel)
.def("range", &State::range, nb::arg("pos") = 0)
.def_prop_ro("iterations", &State::iterations)
.def_prop_ro("name", &State::name)
.def_rw("counters", &State::counters)
.def_prop_ro("thread_index", &State::thread_index)
.def_prop_ro("threads", &State::threads);
m.def("Initialize", Initialize);
m.def("RegisterBenchmark", RegisterBenchmark,
nb::rv_policy::reference);
m.def("RunSpecifiedBenchmarks",
[]() { benchmark::RunSpecifiedBenchmarks(); });
m.def("ClearRegisteredBenchmarks", benchmark::ClearRegisteredBenchmarks);
};
} // namespace
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