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xtensor/benchmark/benchmark_view_assignment.cpp at master · xtensor-stack/xtensor · GitHub
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/*
**************************************************************************
* Copyright (c) 2016, Johan Mabille, Sylvain Corlay and Wolf Vollprecht *
* *
* Distributed under the terms of the BSD 3-Clause License. *
* *
* The full license is in the file LICENSE, distributed with this software. *
***************************************************************************
*/
#
include
<
benchmark/benchmark.h
>
#
include
"
xtensor/containers/xarray.hpp
"
#
include
"
xtensor/containers/xfixed.hpp
"
#
include
"
xtensor/containers/xtensor.hpp
"
#
include
"
xtensor/core/xnoalias.hpp
"
#
include
"
xtensor/generators/xrandom.hpp
"
namespace
xt
{
inline
void
create_xview
(benchmark::State& state)
{
xt::xtensor<
double
,
4
> tens = xt::random::rand<
double
>({
100
,
100
,
3
,
3
});
for
(
auto
_ : state)
{
auto
v =
xt::view
(tens,
1
,
2
,
all
(),
all
());
}
}
inline
void
create_strided_view_outofplace
(benchmark::State& state)
{
xt::xtensor<
double
,
4
> tens = xt::random::rand<
double
>({
100
,
100
,
3
,
3
});
xstrided_slice_vector sv = {
1
,
2
,
all
(),
all
()};
for
(
auto
_ : state)
{
auto
v =
xt::strided_view
(tens, sv);
}
}
inline
void
create_strided_view_inplace
(benchmark::State& state)
{
xt::xtensor<
double
,
4
> tens = xt::random::rand<
double
>({
100
,
100
,
3
,
3
});
for
(
auto
_ : state)
{
auto
v =
xt::strided_view
(tens, {
1
,
2
,
all
(),
all
()});
}
}
inline
void
assign_create_view
(benchmark::State& state)
{
xt::xtensor<
double
,
4
> tens = xt::random::rand<
double
>({
100
,
100
,
3
,
3
});
for
(
auto
_ : state)
{
for
(std::
size_t
i =
0
; i < tens.
shape
()[
0
]; ++i)
{
for
(std::
size_t
j =
0
; j < tens.
shape
()[
1
]; ++j)
{
auto
v =
xt::view
(tens, i, j,
all
(),
all
());
xt::xtensor<
double
,
2
> vas = v;
benchmark::ClobberMemory
();
}
}
}
}
/*
*
* inline void assign_create_strided_view(benchmark::State& state)
* {
* xt::xtensor<double, 4> tens = xt::random::rand<double>({100, 100, 3, 3});
* for (auto _ : state)
* {
* for (std::size_t i = 0; i < tens.shape()[0]; ++i)
* {
* for (std::size_t j = 0; j < tens.shape()[1]; ++j)
* {
* auto v = xt::strided_view(tens, {i, j, all(), all()});
* xt::xtensor<double, 2> vas = v;
* benchmark::ClobberMemory();
* }
* }
* }
* }
*/
inline
void
assign_create_manual_view
(benchmark::State& state)
{
xt::xtensor<
double
,
4
> tens = xt::random::rand<
double
>({
100
,
100
,
3
,
3
});
for
(
auto
_ : state)
{
for
(std::
size_t
i =
0
; i < tens.
shape
()[
0
]; ++i)
{
for
(std::
size_t
j =
0
; j < tens.
shape
()[
1
]; ++j)
{
auto
v =
xt::view
(tens, i, j,
all
(),
all
());
xt::xtensor<
double
,
2
>
vas
(std::array<std::
size_t
,
2
>({
3
,
3
}));
std::copy
(v.
data
() + v.
data_offset
(), v.
data
() + v.
data_offset
() + vas.
size
(), vas.
begin
());
benchmark::ClobberMemory
();
}
}
}
}
inline
void
assign_create_manual_noview
(benchmark::State& state)
{
xt::xtensor<
double
,
4
> tens = xt::random::rand<
double
>({
100
,
100
,
3
,
3
});
for
(
auto
_ : state)
{
for
(std::
size_t
i =
0
; i < tens.
shape
()[
0
]; ++i)
{
for
(std::
size_t
j =
0
; j < tens.
shape
()[
1
]; ++j)
{
ptrdiff_t
offset = i * tens.
strides
()[
0
] + j * tens.
strides
()[
1
];
xt::xtensor<
double
,
2
>
vas
(std::array<std::
size_t
,
2
>({
3
,
3
}));
std::copy
(tens.
data
() + offset, tens.
data
() + offset + vas.
size
(), vas.
begin
());
benchmark::ClobberMemory
();
}
}
}
}
inline
void
data_offset
(benchmark::State& state)
{
xt::xtensor<
double
,
4
> tens = xt::random::rand<
double
>({
100
,
100
,
3
,
3
});
for
(
auto
_ : state)
{
for
(std::
size_t
i =
0
; i < tens.
shape
()[
0
]; ++i)
{
for
(std::
size_t
j =
0
; j < tens.
shape
()[
1
]; ++j)
{
volatile
ptrdiff_t
offset = i * tens.
strides
()[
0
] + j * tens.
strides
()[
1
];
static_cast
<
void
>(offset);
}
}
}
}
inline
void
data_offset_view
(benchmark::State& state)
{
xt::xtensor<
double
,
4
> tens = xt::random::rand<
double
>({
100
,
100
,
3
,
3
});
for
(
auto
_ : state)
{
for
(std::
size_t
i =
0
; i < tens.
shape
()[
0
]; ++i)
{
for
(std::
size_t
j =
0
; j < tens.
shape
()[
1
]; ++j)
{
auto
v =
xt::view
(tens, i, j,
all
(),
all
());
volatile
ptrdiff_t
offset = v.
data_offset
();
static_cast
<
void
>(offset);
}
}
}
}
BENCHMARK
(create_xview);
BENCHMARK
(create_strided_view_outofplace);
BENCHMARK
(create_strided_view_inplace);
BENCHMARK
(assign_create_manual_noview);
//
BENCHMARK(assign_create_strided_view);
BENCHMARK
(assign_create_view);
BENCHMARK
(assign_create_manual_view);
//
BENCHMARK(data_offset);
BENCHMARK
(data_offset_view);
}
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