//
// libsemigroups - C++ library for semigroups and monoids
// Copyright (C) 2020 James D. Mitchell
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
#include "bench-main.hpp" // for LIBSEMIGROUPS_BENCHMARK
#include "catch.hpp" // for REQUIRE, REQUIRE_NOTHROW, REQUIRE_THROWS_AS
#include "libsemigroups/string-view.hpp" // for MultiStringView
namespace libsemigroups {
TEST_CASE(
"MultiStringView iterators",
"[quick]") {
std::string w(0x4C4B40,
'a');
REQUIRE(w.size() == 0x4C4B40);
// 5 million
BENCHMARK(
"std::string") {
for (
auto it = w.cbegin(); it != w.cend(); ++it) {
REQUIRE(*it ==
'a');
}
};
detail::MultiStringView x(w.cbegin(), w.cend());
BENCHMARK(
"StringView 1 block") {
for (
auto it = x.cbegin(); it != x.cend(); ++it) {
REQUIRE(*it ==
'a');
}
};
x.clear();
x.append(w.cbegin(), w.begin() + 1000000);
x.append(w.cbegin() + 19, w.begin() + 1000019);
x.append(w.cbegin() + 119, w.begin() + 1000119);
x.append(w.cbegin() + 1119, w.begin() + 1001119);
x.append(w.cbegin() + 11119, w.begin() + 1011119);
REQUIRE(x.size() == 0x4C4B40);
BENCHMARK(
"MultiStringView 5 blocks") {
for (
auto it = x.cbegin(); it != x.cend(); ++it) {
REQUIRE(*it ==
'a');
}
};
x.clear();
for (size_t i = 0; i < 0x4C4B40 / 10; ++i) {
x.append(w.cbegin(), w.cbegin() + 10);
}
BENCHMARK(
"MultiStringView 500000 blocks") {
for (
auto it = x.cbegin(); it != x.cend(); ++it) {
REQUIRE(*it ==
'a');
}
};
}
TEST_CASE(
"MultiStringView append",
"[001][quick]") {
std::string w(0x4C4B40,
'a');
BENCHMARK(
"std::string::append 500k times 100 chars") {
std::string x;
for (size_t i = 0; i < 0x4C4B40 / 10; ++i) {
x.append(w.cbegin(), w.cbegin() + 100);
}
};
BENCHMARK(
"MultiStringView::append 500k times 100 chars") {
detail::MultiStringView x;
for (size_t i = 0; i < 0x4C4B40 / 10; ++i) {
x.append(w.cbegin(), w.cbegin() + 100);
}
};
BENCHMARK(
"std::string::append 5 million times 10 chars") {
std::string x;
for (size_t i = 0; i < 0x4C4B40; ++i) {
x.append(w.cbegin(), w.cbegin() + 10);
}
};
BENCHMARK(
"MultiStringView::append 5 million times 10 chars") {
detail::MultiStringView x;
for (size_t i = 0; i < 0x4C4B40; ++i) {
x.append(w.cbegin(), w.cbegin() + 10);
}
};
}
TEST_CASE(
"MultiStringView constructor",
"[002][quick]") {
std::string w(1000,
'a');
BENCHMARK(
"std::string::string 50k times 1000 chars") {
for (size_t i = 0; i < 0x4C4B40 / 100; ++i) {
std::string x(w.cbegin(), w.cbegin() + 1000);
REQUIRE(x.size() == 1000);
}
};
BENCHMARK(
"MultiStringView::MultiStringView 50k times 1000 chars") {
for (size_t i = 0; i < 0x4C4B40 / 100; ++i) {
detail::MultiStringView x(w.cbegin(), w.cbegin() + 1000);
REQUIRE(x.size() == 1000);
}
};
BENCHMARK(
"std::string::string 5 million times 10 chars") {
for (size_t i = 0; i < 0x4C4B40; ++i) {
std::string x(w.cbegin(), w.cbegin() + 10);
REQUIRE(x.size() == 10);
}
};
BENCHMARK(
"MultiStringView::MultiStringView 5 million times 10 chars") {
for (size_t i = 0; i < 0x4C4B40; ++i) {
detail::MultiStringView x(w.cbegin(), w.cbegin() + 10);
REQUIRE(x.size() == 10);
}
};
}
}
// namespace libsemigroups