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Bench/trace id hex utilities #322

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2f1476c
benchmark: add micro-benchmarks for TraceID formatting and utilities
AneesPatel Apr 22, 2026
3e8fece
benchmark: factorize tests and add padding worst-case scenarios
AneesPatel May 21, 2026
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1 change: 1 addition & 0 deletions benchmark/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,7 @@
add_executable(dd_trace_cpp-benchmark
benchmark.cpp
hasher.cpp
trace_id_bench.cpp
)

# Google Benchmark is included as a git submodule.
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47 changes: 47 additions & 0 deletions benchmark/trace_id_bench.cpp
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Original file line number Diff line number Diff line change
@@ -0,0 +1,47 @@
#include <benchmark/benchmark.h>
#include <datadog/trace_id.h>

#include "datadog/hex.h"

namespace {
namespace dd = datadog::tracing;

void BM_TraceID_HexPadded(benchmark::State& state, dd::TraceID id) {
for (auto _ : state) {
auto result = id.hex_padded();
benchmark::DoNotOptimize(result);
}
}
BENCHMARK_CAPTURE(BM_TraceID_HexPadded, NoPadding,
dd::TraceID{0xDEADBEEFCAFEBABEULL, 0x0102030405060708ULL});
BENCHMARK_CAPTURE(BM_TraceID_HexPadded, WithPadding, dd::TraceID{1, 0});

void BM_TraceID_ParseHex(benchmark::State& state, std::string input) {
for (auto _ : state) {
auto result = dd::TraceID::parse_hex(input);
benchmark::DoNotOptimize(result);
}
}
BENCHMARK_CAPTURE(BM_TraceID_ParseHex, 64bit, std::string{"deadbeefcafebabe"});
BENCHMARK_CAPTURE(BM_TraceID_ParseHex, 128bit,
std::string{"0102030405060708deadbeefcafebabe"});

void BM_HexPadded_uint64(benchmark::State& state, std::uint64_t value) {
for (auto _ : state) {
auto result = dd::hex_padded(value);
benchmark::DoNotOptimize(result);
}
}
BENCHMARK_CAPTURE(BM_HexPadded_uint64, NoPadding, 0xDEADBEEFCAFEBABEULL);
BENCHMARK_CAPTURE(BM_HexPadded_uint64, WorstCasePadding, 0x1ULL);

void BM_Hex_uint64(benchmark::State& state) {
const std::uint64_t value = 0xDEADBEEFCAFEBABEULL;
for (auto _ : state) {
auto result = dd::hex(value);
benchmark::DoNotOptimize(result);
}
}
BENCHMARK(BM_Hex_uint64);

} // namespace
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