Squashed 'third_party/immer/' content from commit ad3e3556d

git-subtree-dir: third_party/immer
git-subtree-split: ad3e3556d38bb75966dd24c61a774970a7c7957e

benchmark/vector/access.hpp

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+//
+// immer: immutable data structures for C++
+// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+//
+// This software is distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+//
+
+#pragma once
+
+#include "benchmark/vector/common.hpp"
+
+#include <immer/algorithm.hpp>
+
+#if IMMER_BENCHMARK_BOOST_COROUTINE
+#include <boost/coroutine2/all.hpp>
+#endif
+
+namespace {
+
+template <typename Vektor>
+auto benchmark_access_reduce_chunkedseq()
+{
+    return [] (nonius::parameters params)
+    {
+        auto n = params.get<N>();
+        auto v = Vektor{};
+        for (auto i = 0u; i < n; ++i)
+            v.push_back(i);
+        return [=] {
+            auto init = 0u;
+            v.for_each_segment([&] (auto first, auto last) {
+                init = std::accumulate(first, last, init);
+            });
+            return init;
+        };
+    };
+}
+
+template <typename Vektor>
+auto benchmark_access_iter_std()
+{
+    return [] (nonius::parameters params)
+    {
+        auto n = params.get<N>();
+        auto v = Vektor{};
+        for (auto i = 0u; i < n; ++i)
+            v.push_back(i);
+        return [=] {
+            auto volatile x = std::accumulate(v.begin(), v.end(), 0u);
+            return x;
+        };
+    };
+}
+
+template <typename Vektor>
+auto benchmark_access_idx_std()
+{
+    return [] (nonius::parameters params)
+    {
+        auto n = params.get<N>();
+        auto v = Vektor{};
+        for (auto i = 0u; i < n; ++i)
+            v.push_back(i);
+        return [=] {
+            auto r = 0u;
+            for (auto i = 0u; i < n; ++i)
+                r += v[i];
+            volatile auto rr = r;
+            return rr;
+        };
+    };
+}
+
+template <typename Vektor>
+auto benchmark_access_random_std()
+{
+    return [] (nonius::parameters params)
+    {
+        auto n = params.get<N>();
+        auto v = Vektor{};
+        auto g = make_generator(n);
+        for (auto i = 0u; i < n; ++i)
+            v.push_back(i);
+        return [=] {
+            auto r = 0u;
+            for (auto i = 0u; i < n; ++i)
+                r += v[g[i]];
+            volatile auto rr = r;
+            return rr;
+        };
+    };
+}
+
+template <typename Vektor, typename PushFn=push_back_fn>
+auto benchmark_access_iter()
+{
+    return [] (nonius::parameters params)
+    {
+        auto n = params.get<N>();
+
+        auto v = Vektor{};
+        for (auto i = 0u; i < n; ++i)
+            v = PushFn{}(std::move(v), i);
+
+        return [=] {
+            auto volatile x = std::accumulate(v.begin(), v.end(), 0u);
+            return x;
+        };
+    };
+}
+
+#if IMMER_BENCHMARK_BOOST_COROUTINE
+template <typename Vektor, typename PushFn=push_back_fn>
+auto benchmark_access_coro()
+{
+    return [] (nonius::parameters params)
+    {
+        using coro_t = typename boost::coroutines2::coroutine<int>;
+
+        auto n = params.get<N>();
+
+        auto v = Vektor{};
+        for (auto i = 0u; i < n; ++i)
+            v = PushFn{}(std::move(v), i);
+
+        return [=] {
+            auto c = coro_t::pull_type { [&](auto& sink) {
+                v.for_each_chunk([&](auto f, auto l) {
+                    for (; f != l; ++f)
+                        sink(*f);
+                });
+            }};
+            auto volatile x = std::accumulate(begin(c), end(c), 0u);
+            return x;
+        };
+    };
+}
+#endif
+
+template <typename Vektor,
+          typename PushFn=push_back_fn>
+auto benchmark_access_idx()
+{
+    return [] (nonius::parameters params)
+    {
+        auto n = params.get<N>();
+
+        auto v = Vektor{};
+        for (auto i = 0u; i < n; ++i)
+            v = PushFn{}(std::move(v), i);
+
+        return [=] {
+            auto r = 0u;
+            for (auto i = 0u; i < n; ++i)
+                r += v[i];
+            volatile auto rr = r;
+            return rr;
+        };
+    };
+}
+
+template <typename Vektor,
+          typename PushFn=push_back_fn>
+auto benchmark_access_reduce()
+{
+    return [] (nonius::parameters params)
+    {
+        auto n = params.get<N>();
+
+        auto v = Vektor{};
+        for (auto i = 0u; i < n; ++i)
+            v = PushFn{}(std::move(v), i);
+
+        return [=] {
+            auto volatile x = immer::accumulate(v, 0u);
+            return x;
+        };
+    };
+}
+
+template <typename Vektor,
+          typename PushFn=push_back_fn>
+auto benchmark_access_reduce_range()
+{
+    return [] (nonius::parameters params)
+    {
+        auto n = params.get<N>();
+
+        auto v = Vektor{};
+        for (auto i = 0u; i < n; ++i)
+            v = PushFn{}(std::move(v), i);
+
+        return [=] {
+            auto volatile x = immer::accumulate(v.begin(), v.end(), 0u);
+            return x;
+        };
+    };
+}
+
+template <typename Vektor,
+          typename PushFn=push_back_fn>
+auto benchmark_access_random()
+{
+    return [] (nonius::parameters params)
+    {
+        auto n = params.get<N>();
+
+        auto v = Vektor{};
+        for (auto i = 0u; i < n; ++i)
+            v = PushFn{}(std::move(v), i);
+        auto g = make_generator(n);
+
+        return [=] {
+            auto r = 0u;
+            for (auto i = 0u; i < n; ++i)
+                r += v[g[i]];
+            volatile auto rr = r;
+            return rr;
+        };
+    };
+}
+
+template <typename Fn>
+auto benchmark_access_librrb(Fn maker)
+{
+    return
+        [=] (nonius::parameters params) {
+            auto n = params.get<N>();
+            auto v = maker(n);
+            return
+                [=] {
+                    auto r = 0u;
+                    for (auto i = 0u; i < n; ++i)
+                        r += reinterpret_cast<unsigned long>(rrb_nth(v, i));
+                    volatile auto rr = r;
+                    return rr;
+                };
+        };
+}
+
+template <typename Fn>
+auto benchmark_access_random_librrb(Fn maker)
+{
+    return
+        [=] (nonius::parameters params) {
+            auto n = params.get<N>();
+            auto v = maker(n);
+            auto g = make_generator(n);
+            return
+                [=] {
+                    auto r = 0u;
+                    for (auto i = 0u; i < n; ++i)
+                        r += reinterpret_cast<unsigned long>(rrb_nth(v, g[i]));
+                    volatile auto rr = r;
+                    return rr;
+                };
+        };
+}
+
+} // anonymous namespace