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#include <chrono>
#include <sstream>
#include "benchmark/benchmark.h"
#include "SQLParser.h"
#include "parser/bison_parser.h"
#include "parser/flex_lexer.h"
#include "benchmark_utils.h"
// Benchmark the influence of increasing size of the query, while
// the number of tokens remains unchanged.
static void BM_CharacterCount(benchmark::State& st) {
const size_t querySize = st.range(0);
// Base query has size of 18 characters.
std::string query = "SELECT %name% FROM test;";
const uint pad = querySize - 18;
const std::string filler = std::string(pad, 'a');
query.replace(7, 6, filler);
st.counters["num_tokens"] = getNumTokens(query);
st.counters["num_chars"] = query.size();
while (st.KeepRunning()) {
hsql::SQLParserResult result;
hsql::SQLParser::parse(query, &result);
}
}
BENCHMARK(BM_CharacterCount)
->RangeMultiplier(1 << 2)
->Ranges({{1 << 5, 1 << 15},
{5, 5}});
// Benchmark the influence of increasing number of tokens, while
// the number of characters remains unchanged.
static void BM_ConditionalTokens(benchmark::State& st) {
const size_t targetSize = st.range(0);
const size_t numTokens = st.range(1);
// Base query contains 6 tokens.
std::string query = "SELECT * FROM test";
// Create conditional.
std::stringstream condStream;
size_t missingTokens = numTokens - 4;
if (missingTokens > 0) {
condStream << " WHERE a";
missingTokens -= 2;
while (missingTokens > 0) {
condStream << " AND a";
missingTokens -= 2;
}
}
query += condStream.str();
if (targetSize >= query.size()) {
const size_t pad = targetSize - query.size();
const std::string filler = std::string(pad, 'a');
query.replace(7, 1, filler);
} else {
// Query can't be the same length as in the other benchmarks.
// Running this will result in unusable data.
fprintf(stderr, "Too many tokens. Query too long for benchmark char limit (%lu > %lu).\n",
query.size(), targetSize);
return;
}
st.counters["num_tokens"] = getNumTokens(query);
st.counters["num_chars"] = query.size();
while (st.KeepRunning()) {
hsql::SQLParserResult result;
hsql::SQLParser::parse(query, &result);
if (!result.isValid()) st.SkipWithError("Parsing failed!");
}
}
BENCHMARK(BM_ConditionalTokens)
->RangeMultiplier(1 << 2)
->Ranges({{1 << 14, 1 << 14},
{1 << 2, 1 << 11}});
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