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/**********************************************************************
*
* GEOS - Geometry Engine Open Source
* http://geos.osgeo.org
*
* Copyright (C) 2021 Daniel Baston
*
* This is free software; you can redistribute and/or modify it under
* the terms of the GNU Lesser General Public Licence as published
* by the Free Software Foundation.
* See the COPYING file for more information.
*
**********************************************************************/
#include <geos_c.h>
#include <benchmark/benchmark.h>
static std::vector<double> create_buffer(std::size_t N, unsigned int dim) {
std::vector<double> buf(dim * N);
double d = 0.0;
for(auto& di : buf) {
di = d;
d += 1.0;
}
return buf;
}
template<size_t N, size_t dim>
static void BM_CoordSeq_CreateByOrdinate(benchmark::State& state) {
initGEOS(nullptr, nullptr);
auto buf = create_buffer(N, dim);
for (auto _ : state) {
double* ptr = buf.data();
auto seq = GEOSCoordSeq_create(N, dim);
for (std::size_t i = 0; i < N; i++) {
GEOSCoordSeq_setX(seq, i, *ptr++);
GEOSCoordSeq_setY(seq, i, *ptr++);
if (dim == 3) {
GEOSCoordSeq_setZ(seq, i, *ptr++);
}
}
GEOSCoordSeq_destroy(seq);
}
finishGEOS();
}
template<size_t N, size_t dim>
static void BM_CoordSeq_CreateByCoordinate(benchmark::State& state) {
initGEOS(nullptr, nullptr);
auto buf = create_buffer(N, dim);
for (auto _ : state) {
double* ptr = buf.data();
auto seq = GEOSCoordSeq_create(N, dim);
for (std::size_t i = 0; i < N; i++) {
double x = *ptr++;
double y = *ptr++;
if (dim == 2) {
GEOSCoordSeq_setXY(seq, i, x, y);
}
if (dim == 3) {
double z = *ptr++;
GEOSCoordSeq_setXYZ(seq, i, x, y, z);
benchmark::DoNotOptimize(z);
}
benchmark::DoNotOptimize(x);
benchmark::DoNotOptimize(y);
}
GEOSCoordSeq_destroy(seq);
}
finishGEOS();
}
template<size_t N, size_t dim>
static void BM_CoordSeq_CopyByCoordinate(benchmark::State& state) {
initGEOS(nullptr, nullptr);
auto buf = create_buffer(N, dim);
auto seq = GEOSCoordSeq_copyFromBuffer(buf.data(), N, dim == 3, false);
for (auto _ : state) {
double x;
double y;
double z;
for (std::size_t i = 0; i < N; i++) {
if (dim == 2) {
GEOSCoordSeq_getXY(seq, i, &x, &y);
}
if (dim == 3) {
GEOSCoordSeq_getXYZ(seq, i, &x, &y, &z);
benchmark::DoNotOptimize(z);
}
benchmark::DoNotOptimize(x);
benchmark::DoNotOptimize(y);
}
}
GEOSCoordSeq_destroy(seq);
finishGEOS();
}
template<size_t N, size_t dim>
static void BM_CoordSeq_CopyToBuffer(benchmark::State& state) {
initGEOS(nullptr, nullptr);
auto buf = create_buffer(N, dim);
auto seq = GEOSCoordSeq_copyFromBuffer(buf.data(), N, dim == 3, false);
for (auto _ : state) {
GEOSCoordSeq_copyToBuffer(seq, buf.data(), dim == 3, false);
benchmark::DoNotOptimize(buf);
}
GEOSCoordSeq_destroy(seq);
finishGEOS();
}
template<size_t N, size_t dim>
static void BM_CoordSeq_CopyFromBuffer(benchmark::State& state) {
initGEOS(nullptr, nullptr);
auto buf = create_buffer(N, dim);
for (auto _ : state) {
auto seq = GEOSCoordSeq_copyFromBuffer(buf.data(), N, dim == 3, false);
GEOSCoordSeq_destroy(seq);
}
finishGEOS();
}
// N = 10
BENCHMARK_TEMPLATE(BM_CoordSeq_CreateByOrdinate, 10, 2);
BENCHMARK_TEMPLATE(BM_CoordSeq_CreateByCoordinate, 10, 2);
BENCHMARK_TEMPLATE(BM_CoordSeq_CopyFromBuffer, 10, 2);
BENCHMARK_TEMPLATE(BM_CoordSeq_CreateByOrdinate, 10, 3);
BENCHMARK_TEMPLATE(BM_CoordSeq_CreateByCoordinate, 10, 3);
BENCHMARK_TEMPLATE(BM_CoordSeq_CopyFromBuffer, 10, 3);
BENCHMARK_TEMPLATE(BM_CoordSeq_CopyByCoordinate, 10, 2);
BENCHMARK_TEMPLATE(BM_CoordSeq_CopyToBuffer, 10, 2);
BENCHMARK_TEMPLATE(BM_CoordSeq_CopyByCoordinate, 10, 3);
BENCHMARK_TEMPLATE(BM_CoordSeq_CopyToBuffer, 10, 3);
// N = 1,000
BENCHMARK_TEMPLATE(BM_CoordSeq_CreateByOrdinate, 1000, 2);
BENCHMARK_TEMPLATE(BM_CoordSeq_CreateByCoordinate, 1000, 2);
BENCHMARK_TEMPLATE(BM_CoordSeq_CopyFromBuffer, 1000, 2);
BENCHMARK_TEMPLATE(BM_CoordSeq_CreateByOrdinate, 1000, 3);
BENCHMARK_TEMPLATE(BM_CoordSeq_CreateByCoordinate, 1000, 3);
BENCHMARK_TEMPLATE(BM_CoordSeq_CopyFromBuffer, 1000, 3);
BENCHMARK_TEMPLATE(BM_CoordSeq_CopyByCoordinate, 1000, 2);
BENCHMARK_TEMPLATE(BM_CoordSeq_CopyToBuffer, 1000, 2);
BENCHMARK_TEMPLATE(BM_CoordSeq_CopyByCoordinate, 1000, 3);
BENCHMARK_TEMPLATE(BM_CoordSeq_CopyToBuffer, 1000, 3);
// N = 10,000
BENCHMARK_TEMPLATE(BM_CoordSeq_CreateByOrdinate, 10000, 2);
BENCHMARK_TEMPLATE(BM_CoordSeq_CreateByCoordinate, 10000, 2);
BENCHMARK_TEMPLATE(BM_CoordSeq_CopyFromBuffer, 10000, 2);
BENCHMARK_TEMPLATE(BM_CoordSeq_CreateByOrdinate, 10000, 3);
BENCHMARK_TEMPLATE(BM_CoordSeq_CreateByCoordinate, 10000, 3);
BENCHMARK_TEMPLATE(BM_CoordSeq_CopyFromBuffer, 10000, 3);
BENCHMARK_TEMPLATE(BM_CoordSeq_CopyByCoordinate, 10000, 2);
BENCHMARK_TEMPLATE(BM_CoordSeq_CopyToBuffer, 10000, 2);
BENCHMARK_TEMPLATE(BM_CoordSeq_CopyByCoordinate, 10000, 3);
BENCHMARK_TEMPLATE(BM_CoordSeq_CopyToBuffer, 10000, 3);
BENCHMARK_MAIN();
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