summaryrefslogtreecommitdiffstats
path: root/gnu/llvm/libcxx/benchmarks/unordered_set_operations.bench.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'gnu/llvm/libcxx/benchmarks/unordered_set_operations.bench.cpp')
-rw-r--r--gnu/llvm/libcxx/benchmarks/unordered_set_operations.bench.cpp307
1 files changed, 307 insertions, 0 deletions
diff --git a/gnu/llvm/libcxx/benchmarks/unordered_set_operations.bench.cpp b/gnu/llvm/libcxx/benchmarks/unordered_set_operations.bench.cpp
new file mode 100644
index 00000000000..e0030d6c473
--- /dev/null
+++ b/gnu/llvm/libcxx/benchmarks/unordered_set_operations.bench.cpp
@@ -0,0 +1,307 @@
+#include <unordered_set>
+#include <vector>
+#include <functional>
+#include <cstdint>
+#include <cstdlib>
+#include <cstring>
+
+#include "benchmark/benchmark.h"
+
+#include "ContainerBenchmarks.h"
+#include "GenerateInput.h"
+#include "test_macros.h"
+
+using namespace ContainerBenchmarks;
+
+constexpr std::size_t TestNumInputs = 1024;
+
+template <class _Size>
+inline TEST_ALWAYS_INLINE
+_Size loadword(const void* __p) {
+ _Size __r;
+ std::memcpy(&__r, __p, sizeof(__r));
+ return __r;
+}
+
+inline TEST_ALWAYS_INLINE
+std::size_t rotate_by_at_least_1(std::size_t __val, int __shift) {
+ return (__val >> __shift) | (__val << (64 - __shift));
+}
+
+inline TEST_ALWAYS_INLINE
+std::size_t hash_len_16(std::size_t __u, std::size_t __v) {
+ const std::size_t __mul = 0x9ddfea08eb382d69ULL;
+ std::size_t __a = (__u ^ __v) * __mul;
+ __a ^= (__a >> 47);
+ std::size_t __b = (__v ^ __a) * __mul;
+ __b ^= (__b >> 47);
+ __b *= __mul;
+ return __b;
+}
+
+
+template <std::size_t _Len>
+inline TEST_ALWAYS_INLINE
+std::size_t hash_len_0_to_8(const char* __s) {
+ static_assert(_Len == 4 || _Len == 8, "");
+ const uint64_t __a = loadword<uint32_t>(__s);
+ const uint64_t __b = loadword<uint32_t>(__s + _Len - 4);
+ return hash_len_16(_Len + (__a << 3), __b);
+}
+
+struct UInt32Hash {
+ UInt32Hash() = default;
+ inline TEST_ALWAYS_INLINE
+ std::size_t operator()(uint32_t data) const {
+ return hash_len_0_to_8<4>(reinterpret_cast<const char*>(&data));
+ }
+};
+
+struct UInt64Hash {
+ UInt64Hash() = default;
+ inline TEST_ALWAYS_INLINE
+ std::size_t operator()(uint64_t data) const {
+ return hash_len_0_to_8<8>(reinterpret_cast<const char*>(&data));
+ }
+};
+
+struct UInt128Hash {
+ UInt128Hash() = default;
+ inline TEST_ALWAYS_INLINE
+ std::size_t operator()(__uint128_t data) const {
+ const __uint128_t __mask = static_cast<std::size_t>(-1);
+ const std::size_t __a = (std::size_t)(data & __mask);
+ const std::size_t __b = (std::size_t)((data & (__mask << 64)) >> 64);
+ return hash_len_16(__a, rotate_by_at_least_1(__b + 16, 16)) ^ __b;
+ }
+};
+
+struct UInt32Hash2 {
+ UInt32Hash2() = default;
+ inline TEST_ALWAYS_INLINE
+ std::size_t operator()(uint32_t data) const {
+ const uint32_t __m = 0x5bd1e995;
+ const uint32_t __r = 24;
+ uint32_t __h = 4;
+ uint32_t __k = data;
+ __k *= __m;
+ __k ^= __k >> __r;
+ __k *= __m;
+ __h *= __m;
+ __h ^= __k;
+ __h ^= __h >> 13;
+ __h *= __m;
+ __h ^= __h >> 15;
+ return __h;
+ }
+};
+
+struct UInt64Hash2 {
+ UInt64Hash2() = default;
+ inline TEST_ALWAYS_INLINE
+ std::size_t operator()(uint64_t data) const {
+ return hash_len_0_to_8<8>(reinterpret_cast<const char*>(&data));
+ }
+};
+
+//----------------------------------------------------------------------------//
+// BM_Hash
+// ---------------------------------------------------------------------------//
+
+template <class HashFn, class GenInputs>
+void BM_Hash(benchmark::State& st, HashFn fn, GenInputs gen) {
+ auto in = gen(st.range(0));
+ const auto end = in.data() + in.size();
+ std::size_t last_hash = 0;
+ benchmark::DoNotOptimize(&last_hash);
+ while (st.KeepRunning()) {
+ for (auto it = in.data(); it != end; ++it) {
+ benchmark::DoNotOptimize(last_hash += fn(*it));
+ }
+ benchmark::ClobberMemory();
+ }
+}
+
+BENCHMARK_CAPTURE(BM_Hash,
+ uint32_random_std_hash,
+ std::hash<uint32_t>{},
+ getRandomIntegerInputs<uint32_t>) -> Arg(TestNumInputs);
+
+BENCHMARK_CAPTURE(BM_Hash,
+ uint32_random_custom_hash,
+ UInt32Hash{},
+ getRandomIntegerInputs<uint32_t>) -> Arg(TestNumInputs);
+
+BENCHMARK_CAPTURE(BM_Hash,
+ uint32_top_std_hash,
+ std::hash<uint32_t>{},
+ getSortedTopBitsIntegerInputs<uint32_t>) -> Arg(TestNumInputs);
+
+BENCHMARK_CAPTURE(BM_Hash,
+ uint32_top_custom_hash,
+ UInt32Hash{},
+ getSortedTopBitsIntegerInputs<uint32_t>) -> Arg(TestNumInputs);
+
+
+//----------------------------------------------------------------------------//
+// BM_InsertValue
+// ---------------------------------------------------------------------------//
+
+
+// Sorted Ascending //
+BENCHMARK_CAPTURE(BM_InsertValue,
+ unordered_set_uint32,
+ std::unordered_set<uint32_t>{},
+ getRandomIntegerInputs<uint32_t>)->Arg(TestNumInputs);
+
+BENCHMARK_CAPTURE(BM_InsertValue,
+ unordered_set_uint32_sorted,
+ std::unordered_set<uint32_t>{},
+ getSortedIntegerInputs<uint32_t>)->Arg(TestNumInputs);
+
+// Top Bytes //
+BENCHMARK_CAPTURE(BM_InsertValue,
+ unordered_set_top_bits_uint32,
+ std::unordered_set<uint32_t>{},
+ getSortedTopBitsIntegerInputs<uint32_t>)->Arg(TestNumInputs);
+
+BENCHMARK_CAPTURE(BM_InsertValueRehash,
+ unordered_set_top_bits_uint32,
+ std::unordered_set<uint32_t, UInt32Hash>{},
+ getSortedTopBitsIntegerInputs<uint32_t>)->Arg(TestNumInputs);
+
+// String //
+BENCHMARK_CAPTURE(BM_InsertValue,
+ unordered_set_string,
+ std::unordered_set<std::string>{},
+ getRandomStringInputs)->Arg(TestNumInputs);
+
+BENCHMARK_CAPTURE(BM_InsertValueRehash,
+ unordered_set_string,
+ std::unordered_set<std::string>{},
+ getRandomStringInputs)->Arg(TestNumInputs);
+
+//----------------------------------------------------------------------------//
+// BM_Find
+// ---------------------------------------------------------------------------//
+
+// Random //
+BENCHMARK_CAPTURE(BM_Find,
+ unordered_set_random_uint64,
+ std::unordered_set<uint64_t>{},
+ getRandomIntegerInputs<uint64_t>)->Arg(TestNumInputs);
+
+BENCHMARK_CAPTURE(BM_FindRehash,
+ unordered_set_random_uint64,
+ std::unordered_set<uint64_t, UInt64Hash>{},
+ getRandomIntegerInputs<uint64_t>)->Arg(TestNumInputs);
+
+// Sorted //
+BENCHMARK_CAPTURE(BM_Find,
+ unordered_set_sorted_uint64,
+ std::unordered_set<uint64_t>{},
+ getSortedIntegerInputs<uint64_t>)->Arg(TestNumInputs);
+
+BENCHMARK_CAPTURE(BM_FindRehash,
+ unordered_set_sorted_uint64,
+ std::unordered_set<uint64_t, UInt64Hash>{},
+ getSortedIntegerInputs<uint64_t>)->Arg(TestNumInputs);
+
+
+// Sorted //
+#if 1
+BENCHMARK_CAPTURE(BM_Find,
+ unordered_set_sorted_uint128,
+ std::unordered_set<__uint128_t, UInt128Hash>{},
+ getSortedTopBitsIntegerInputs<__uint128_t>)->Arg(TestNumInputs);
+
+BENCHMARK_CAPTURE(BM_FindRehash,
+ unordered_set_sorted_uint128,
+ std::unordered_set<__uint128_t, UInt128Hash>{},
+ getSortedTopBitsIntegerInputs<__uint128_t>)->Arg(TestNumInputs);
+#endif
+
+// Sorted //
+BENCHMARK_CAPTURE(BM_Find,
+ unordered_set_sorted_uint32,
+ std::unordered_set<uint32_t>{},
+ getSortedIntegerInputs<uint32_t>)->Arg(TestNumInputs);
+
+BENCHMARK_CAPTURE(BM_FindRehash,
+ unordered_set_sorted_uint32,
+ std::unordered_set<uint32_t, UInt32Hash2>{},
+ getSortedIntegerInputs<uint32_t>)->Arg(TestNumInputs);
+
+// Sorted Ascending //
+BENCHMARK_CAPTURE(BM_Find,
+ unordered_set_sorted_large_uint64,
+ std::unordered_set<uint64_t>{},
+ getSortedLargeIntegerInputs<uint64_t>)->Arg(TestNumInputs);
+
+BENCHMARK_CAPTURE(BM_FindRehash,
+ unordered_set_sorted_large_uint64,
+ std::unordered_set<uint64_t, UInt64Hash>{},
+ getSortedLargeIntegerInputs<uint64_t>)->Arg(TestNumInputs);
+
+
+// Top Bits //
+BENCHMARK_CAPTURE(BM_Find,
+ unordered_set_top_bits_uint64,
+ std::unordered_set<uint64_t>{},
+ getSortedTopBitsIntegerInputs<uint64_t>)->Arg(TestNumInputs);
+
+BENCHMARK_CAPTURE(BM_FindRehash,
+ unordered_set_top_bits_uint64,
+ std::unordered_set<uint64_t, UInt64Hash>{},
+ getSortedTopBitsIntegerInputs<uint64_t>)->Arg(TestNumInputs);
+
+// String //
+BENCHMARK_CAPTURE(BM_Find,
+ unordered_set_string,
+ std::unordered_set<std::string>{},
+ getRandomStringInputs)->Arg(TestNumInputs);
+
+BENCHMARK_CAPTURE(BM_FindRehash,
+ unordered_set_string,
+ std::unordered_set<std::string>{},
+ getRandomStringInputs)->Arg(TestNumInputs);
+
+///////////////////////////////////////////////////////////////////////////////
+BENCHMARK_CAPTURE(BM_InsertDuplicate,
+ unordered_set_int,
+ std::unordered_set<int>{},
+ getRandomIntegerInputs<int>)->Arg(TestNumInputs);
+BENCHMARK_CAPTURE(BM_InsertDuplicate,
+ unordered_set_string,
+ std::unordered_set<std::string>{},
+ getRandomStringInputs)->Arg(TestNumInputs);
+
+BENCHMARK_CAPTURE(BM_EmplaceDuplicate,
+ unordered_set_int,
+ std::unordered_set<int>{},
+ getRandomIntegerInputs<int>)->Arg(TestNumInputs);
+BENCHMARK_CAPTURE(BM_EmplaceDuplicate,
+ unordered_set_string,
+ std::unordered_set<std::string>{},
+ getRandomStringInputs)->Arg(TestNumInputs);
+
+BENCHMARK_CAPTURE(BM_InsertDuplicate,
+ unordered_set_int_insert_arg,
+ std::unordered_set<int>{},
+ getRandomIntegerInputs<int>)->Arg(TestNumInputs);
+BENCHMARK_CAPTURE(BM_InsertDuplicate,
+ unordered_set_string_insert_arg,
+ std::unordered_set<std::string>{},
+ getRandomStringInputs)->Arg(TestNumInputs);
+
+BENCHMARK_CAPTURE(BM_EmplaceDuplicate,
+ unordered_set_int_insert_arg,
+ std::unordered_set<int>{},
+ getRandomIntegerInputs<unsigned>)->Arg(TestNumInputs);
+
+BENCHMARK_CAPTURE(BM_EmplaceDuplicate,
+ unordered_set_string_arg,
+ std::unordered_set<std::string>{},
+ getRandomCStringInputs)->Arg(TestNumInputs);
+
+BENCHMARK_MAIN();
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.