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62 lines
1.6 KiB
C++
62 lines
1.6 KiB
C++
/*
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* Copyright (C) 2019-present ScyllaDB
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*/
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/*
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* SPDX-License-Identifier: LicenseRef-ScyllaDB-Source-Available-1.1
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*/
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#include <seastar/testing/perf_tests.hh>
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#include <seastar/testing/random.hh>
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#include <seastar/testing/test_runner.hh>
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#include <random>
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#include "vint-serialization.hh"
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class vint {
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public:
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static constexpr size_t count = 1000;
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private:
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std::vector<uint64_t> _integers;
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bytes _serialized;
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public:
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vint()
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: _integers(count)
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, _serialized(bytes::initialized_later{}, count * max_vint_length)
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{
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auto eng = seastar::testing::local_random_engine;
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auto dist = std::uniform_int_distribution<uint64_t>{};
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std::generate_n(_integers.begin(), count, [&] { return dist(eng); });
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auto dst = _serialized.data();
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for (auto v : _integers) {
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auto len = unsigned_vint::serialize(v, dst);
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dst += len;
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}
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}
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const std::vector<uint64_t>& integers() const { return _integers; }
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bytes_view serialized() const { return bytes_view(_serialized.data()); }
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};
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PERF_TEST_F(vint, serialize) {
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std::array<int8_t, max_vint_length> output;
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auto dst = output.data();
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for (auto v : integers()) {
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perf_tests::do_not_optimize(unsigned_vint::serialize(v, dst));
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perf_tests::do_not_optimize(dst);
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}
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return count;
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}
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PERF_TEST_F(vint, deserialize) {
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auto src = serialized();
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for (auto i = 0u; i < count; i++) {
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auto len = unsigned_vint::serialized_size_from_first_byte(src.front());
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perf_tests::do_not_optimize(unsigned_vint::deserialize(src));
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src.remove_prefix(len);
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}
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return count;
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}
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