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Add _Fresh variants to measure heap allocation cost in encode benchmarks

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This commit is contained in:
J. Nick Koston
2026-03-16 22:44:16 -10:00
parent 621ba4d5b4
commit e34855b92e
1 changed files with 35 additions and 0 deletions
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tests/benchmarks/components/api/bench_proto_encode.cpp
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@@ -36,6 +36,7 @@ static void CalculateSize_SensorStateResponse(benchmark::State &state) {
}
BENCHMARK(CalculateSize_SensorStateResponse);
// Steady state: buffer already allocated from previous iteration
static void CalcAndEncode_SensorStateResponse(benchmark::State &state) {
APIBuffer buffer;
SensorStateResponse msg;
@@ -53,6 +54,24 @@ static void CalcAndEncode_SensorStateResponse(benchmark::State &state) {
}
BENCHMARK(CalcAndEncode_SensorStateResponse);
// Cold path: fresh buffer each iteration (measures heap allocation)
static void CalcAndEncode_SensorStateResponse_Fresh(benchmark::State &state) {
SensorStateResponse msg;
msg.key = 0x12345678;
msg.state = 23.5f;
msg.missing_state = false;
for (auto _ : state) {
APIBuffer buffer;
uint32_t size = msg.calculate_size();
buffer.resize(size);
ProtoWriteBuffer writer(&buffer, 0);
msg.encode(writer);
benchmark::DoNotOptimize(buffer.data());
}
}
BENCHMARK(CalcAndEncode_SensorStateResponse_Fresh);
// --- BinarySensorStateResponse ---
static void Encode_BinarySensorStateResponse(benchmark::State &state) {
@@ -193,6 +212,7 @@ static void Encode_DeviceInfoResponse(benchmark::State &state) {
}
BENCHMARK(Encode_DeviceInfoResponse);
// Steady state: buffer already allocated from previous iteration
static void CalcAndEncode_DeviceInfoResponse(benchmark::State &state) {
auto msg = make_device_info_response();
APIBuffer buffer;
@@ -207,4 +227,19 @@ static void CalcAndEncode_DeviceInfoResponse(benchmark::State &state) {
}
BENCHMARK(CalcAndEncode_DeviceInfoResponse);
// Cold path: fresh buffer each iteration (measures heap allocation)
static void CalcAndEncode_DeviceInfoResponse_Fresh(benchmark::State &state) {
auto msg = make_device_info_response();
for (auto _ : state) {
APIBuffer buffer;
uint32_t size = msg.calculate_size();
buffer.resize(size);
ProtoWriteBuffer writer(&buffer, 0);
msg.encode(writer);
benchmark::DoNotOptimize(buffer.data());
}
}
BENCHMARK(CalcAndEncode_DeviceInfoResponse_Fresh);
} // namespace esphome::api::benchmarks