Function BM_StrCatLocalArena

eval/tests/allocation_benchmark_test.cc:41–65

Evaluates cel expression: '"1" + "1" + ...'

// Evaluates cel expression:
// '"1" + "1" + ...'
static void BM_StrCatLocalArena(benchmark::State& state) {
  std::string expr("'1'");
  int len = state.range(0);
  auto builder = CreateCelExpressionBuilder();
  ASSERT_OK(RegisterBuiltinFunctions(builder->GetRegistry()));

  for (int i = 0; i < len; i++) {
    expr = absl::Substitute("($0 + $0)", expr);
  }

  ASSERT_OK_AND_ASSIGN(ParsedExpr parsed_expr, Parse(expr));
  ASSERT_OK_AND_ASSIGN(auto cel_expr,
                       builder->CreateExpression(&parsed_expr.expr(),
                                                 &parsed_expr.source_info()));

  for (auto _ : state) {
    google::protobuf::Arena arena;
    Activation activation;
    ASSERT_OK_AND_ASSIGN(CelValue result,
                         cel_expr->Evaluate(activation, &arena));
    CelValue::StringHolder holder;
    ASSERT_TRUE(result.GetValue(&holder));
    ASSERT_EQ(holder.value().length(), 1 << len);
  }
}
BENCHMARK(BM_StrCatLocalArena)->DenseRange(0, 8, 2);

// Evaluates cel expression: