mirror of
https://github.com/esphome/esphome.git
synced 2026-09-01 18:46:02 +00:00
J. Nick Koston
38ff332fec
Add automated benchmarks using Google Benchmark to prevent performance regressions in the API protobuf encoding/decoding and core loop paths. Benchmarks cover: - Protobuf encode: SensorState, BinarySensorState, HelloResponse, LightState, DeviceInfoResponse (20 nested devices + 20 areas) - Protobuf decode: HelloRequest, SwitchCommand, LightCommand - Protobuf calculate_size and full calc+encode send path - Varint parse/encode/size for various value ranges - Scheduler call/next_schedule_in with idle and active timers - Application loop component dispatch and blocking guard overhead Infrastructure: - Extract shared build logic from cpp_unit_test.py into test_helpers.py - Add cpp_benchmark.py mirroring the unit test build pattern - Support benchmark.yaml per component dir for declaring dependencies - Add CodSpeed CI workflow triggered on api/core changes - Fix ProtoMessage protected destructor on host platform
100 lines
2.6 KiB
C++
100 lines
2.6 KiB
C++
#include <benchmark/benchmark.h>
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#include "esphome/components/api/proto.h"
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#include "esphome/components/api/api_buffer.h"
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namespace esphome::api::benchmarks {
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// --- ProtoVarInt::parse() benchmarks ---
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static void BM_ProtoVarInt_Parse_SingleByte(benchmark::State &state) {
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// Single-byte varint (0-127) — the most common case (fast path)
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uint8_t buf[] = {0x42}; // value = 66
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for (auto _ : state) {
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auto result = ProtoVarInt::parse(buf, sizeof(buf));
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benchmark::DoNotOptimize(result);
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}
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}
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BENCHMARK(BM_ProtoVarInt_Parse_SingleByte);
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static void BM_ProtoVarInt_Parse_TwoByte(benchmark::State &state) {
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// Two-byte varint (128-16383)
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uint8_t buf[] = {0x80, 0x01}; // value = 128
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for (auto _ : state) {
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auto result = ProtoVarInt::parse(buf, sizeof(buf));
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benchmark::DoNotOptimize(result);
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}
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}
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BENCHMARK(BM_ProtoVarInt_Parse_TwoByte);
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static void BM_ProtoVarInt_Parse_FiveByte(benchmark::State &state) {
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// Five-byte varint (max uint32 = 4294967295)
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uint8_t buf[] = {0xFF, 0xFF, 0xFF, 0xFF, 0x0F};
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for (auto _ : state) {
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auto result = ProtoVarInt::parse(buf, sizeof(buf));
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benchmark::DoNotOptimize(result);
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}
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}
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BENCHMARK(BM_ProtoVarInt_Parse_FiveByte);
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// --- Varint encoding benchmarks ---
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static void BM_Encode_Varint_Small(benchmark::State &state) {
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// Value < 128 — single byte fast path
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APIBuffer buffer;
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buffer.resize(16);
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for (auto _ : state) {
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ProtoWriteBuffer writer(&buffer, 0);
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writer.encode_varint_raw(42);
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benchmark::DoNotOptimize(buffer.data());
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}
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}
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BENCHMARK(BM_Encode_Varint_Small);
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static void BM_Encode_Varint_Large(benchmark::State &state) {
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// Value > 128 — multi-byte slow path
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APIBuffer buffer;
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buffer.resize(16);
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for (auto _ : state) {
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ProtoWriteBuffer writer(&buffer, 0);
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writer.encode_varint_raw(300);
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benchmark::DoNotOptimize(buffer.data());
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}
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}
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BENCHMARK(BM_Encode_Varint_Large);
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static void BM_Encode_Varint_MaxUint32(benchmark::State &state) {
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APIBuffer buffer;
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buffer.resize(16);
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for (auto _ : state) {
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ProtoWriteBuffer writer(&buffer, 0);
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writer.encode_varint_raw(0xFFFFFFFF);
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benchmark::DoNotOptimize(buffer.data());
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}
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}
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BENCHMARK(BM_Encode_Varint_MaxUint32);
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// --- ProtoSize::varint() benchmarks ---
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static void BM_ProtoSize_Varint_Small(benchmark::State &state) {
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for (auto _ : state) {
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benchmark::DoNotOptimize(ProtoSize::varint(42));
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}
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}
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BENCHMARK(BM_ProtoSize_Varint_Small);
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static void BM_ProtoSize_Varint_Large(benchmark::State &state) {
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for (auto _ : state) {
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benchmark::DoNotOptimize(ProtoSize::varint(0xFFFFFFFF));
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}
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}
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BENCHMARK(BM_ProtoSize_Varint_Large);
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} // namespace esphome::api::benchmarks
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