Remove custom testing and benchmarking code.

Snappy includes a testing framework, which implements a subset of the
Google Test API, and can be used when Google Test is not available.
Snappy also includes a micro-benchmark framework, which implements an
old version of the Google Benchmark API.

This CL replaces the custom test and micro-benchmark frameworks with
google/googletest and google/benchmark. The code is vendored in
third_party/ via git submodules. The setup is similar to google/crc32c
and google/leveldb.

This CL also updates the benchmarking code to the modern Google
Benchmark API.

Benchmark results are expected to be more precise, as the old framework
ran each benchmark with a fixed number of iterations, whereas Google
Benchmark keeps iterating until the noise is low.

PiperOrigin-RevId: 347456142

1 files changed, 0 insertions, 185 deletions

diff --git a/snappy-test.cc b/snappy-test.cc
index e7762a3..4f6a2bf 100644
--- a/snappy-test.cc
+++ b/snappy-test.cc
@@ -76,191 +76,6 @@ std::string StrFormat(const char* format, ...) {
   return buf;
 }
 
-bool benchmark_running = false;
-int64_t benchmark_real_time_us = 0;
-int64_t benchmark_cpu_time_us = 0;
-std::string* benchmark_label = nullptr;
-int64_t benchmark_bytes_processed = 0;
-
-void ResetBenchmarkTiming() {
-  benchmark_real_time_us = 0;
-  benchmark_cpu_time_us = 0;
-}
-
-#ifdef WIN32
-LARGE_INTEGER benchmark_start_real;
-FILETIME benchmark_start_cpu;
-#else  // WIN32
-struct timeval benchmark_start_real;
-struct rusage benchmark_start_cpu;
-#endif  // WIN32
-
-void StartBenchmarkTiming() {
-#ifdef WIN32
-  QueryPerformanceCounter(&benchmark_start_real);
-  FILETIME dummy;
-  CHECK(GetProcessTimes(
-      GetCurrentProcess(), &dummy, &dummy, &dummy, &benchmark_start_cpu));
-#else
-  gettimeofday(&benchmark_start_real, NULL);
-  if (getrusage(RUSAGE_SELF, &benchmark_start_cpu) == -1) {
-    std::perror("getrusage(RUSAGE_SELF)");
-    std::exit(1);
-  }
-#endif
-  benchmark_running = true;
-}
-
-void StopBenchmarkTiming() {
-  if (!benchmark_running) {
-    return;
-  }
-
-#ifdef WIN32
-  LARGE_INTEGER benchmark_stop_real;
-  LARGE_INTEGER benchmark_frequency;
-  QueryPerformanceCounter(&benchmark_stop_real);
-  QueryPerformanceFrequency(&benchmark_frequency);
-
-  double elapsed_real = static_cast<double>(
-      benchmark_stop_real.QuadPart - benchmark_start_real.QuadPart) /
-      benchmark_frequency.QuadPart;
-  benchmark_real_time_us += elapsed_real * 1e6 + 0.5;
-
-  FILETIME benchmark_stop_cpu, dummy;
-  CHECK(GetProcessTimes(
-      GetCurrentProcess(), &dummy, &dummy, &dummy, &benchmark_stop_cpu));
-
-  ULARGE_INTEGER start_ulargeint;
-  start_ulargeint.LowPart = benchmark_start_cpu.dwLowDateTime;
-  start_ulargeint.HighPart = benchmark_start_cpu.dwHighDateTime;
-
-  ULARGE_INTEGER stop_ulargeint;
-  stop_ulargeint.LowPart = benchmark_stop_cpu.dwLowDateTime;
-  stop_ulargeint.HighPart = benchmark_stop_cpu.dwHighDateTime;
-
-  benchmark_cpu_time_us +=
-      (stop_ulargeint.QuadPart - start_ulargeint.QuadPart + 5) / 10;
-#else  // WIN32
-  struct timeval benchmark_stop_real;
-  gettimeofday(&benchmark_stop_real, NULL);
-  benchmark_real_time_us +=
-      1000000 * (benchmark_stop_real.tv_sec - benchmark_start_real.tv_sec);
-  benchmark_real_time_us +=
-      (benchmark_stop_real.tv_usec - benchmark_start_real.tv_usec);
-
-  struct rusage benchmark_stop_cpu;
-  if (getrusage(RUSAGE_SELF, &benchmark_stop_cpu) == -1) {
-    std::perror("getrusage(RUSAGE_SELF)");
-    std::exit(1);
-  }
-  benchmark_cpu_time_us += 1000000 * (benchmark_stop_cpu.ru_utime.tv_sec -
-                                      benchmark_start_cpu.ru_utime.tv_sec);
-  benchmark_cpu_time_us += (benchmark_stop_cpu.ru_utime.tv_usec -
-                            benchmark_start_cpu.ru_utime.tv_usec);
-#endif  // WIN32
-
-  benchmark_running = false;
-}
-
-void SetBenchmarkLabel(const std::string& str) {
-  if (benchmark_label) {
-    delete benchmark_label;
-  }
-  benchmark_label = new std::string(str);
-}
-
-void SetBenchmarkBytesProcessed(int64_t bytes) {
-  benchmark_bytes_processed = bytes;
-}
-
-struct BenchmarkRun {
-  int64_t real_time_us;
-  int64_t cpu_time_us;
-};
-
-struct BenchmarkCompareCPUTime {
-  bool operator() (const BenchmarkRun& a, const BenchmarkRun& b) const {
-    return a.cpu_time_us < b.cpu_time_us;
-  }
-};
-
-void Benchmark::Run() {
-  for (int test_case_num = start_; test_case_num <= stop_; ++test_case_num) {
-    // Run a few iterations first to find out approximately how fast
-    // the benchmark is.
-    const int kCalibrateIterations = 100;
-    ResetBenchmarkTiming();
-    StartBenchmarkTiming();
-    (*function_)(kCalibrateIterations, test_case_num);
-    StopBenchmarkTiming();
-
-    // Let each test case run for about 200ms, but at least as many
-    // as we used to calibrate.
-    // Run five times and pick the median.
-    const int kNumRuns = 5;
-    const int kMedianPos = kNumRuns / 2;
-    int num_iterations = 0;
-    if (benchmark_real_time_us > 0) {
-      num_iterations = 200000 * kCalibrateIterations / benchmark_real_time_us;
-    }
-    num_iterations = std::max(num_iterations, kCalibrateIterations);
-    BenchmarkRun benchmark_runs[kNumRuns];
-
-    for (int run = 0; run < kNumRuns; ++run) {
-      ResetBenchmarkTiming();
-      StartBenchmarkTiming();
-      (*function_)(num_iterations, test_case_num);
-      StopBenchmarkTiming();
-
-      benchmark_runs[run].real_time_us = benchmark_real_time_us;
-      benchmark_runs[run].cpu_time_us = benchmark_cpu_time_us;
-    }
-
-    std::string heading = StrFormat("%s/%d", name_.c_str(), test_case_num);
-    std::string human_readable_speed;
-
-    std::nth_element(benchmark_runs,
-                     benchmark_runs + kMedianPos,
-                     benchmark_runs + kNumRuns,
-                     BenchmarkCompareCPUTime());
-    int64_t real_time_us = benchmark_runs[kMedianPos].real_time_us;
-    int64_t cpu_time_us = benchmark_runs[kMedianPos].cpu_time_us;
-    if (cpu_time_us <= 0) {
-      human_readable_speed = "?";
-    } else {
-      int64_t bytes_per_second =
-          benchmark_bytes_processed * 1000000 / cpu_time_us;
-      if (bytes_per_second < 1024) {
-        human_readable_speed =
-            StrFormat("%dB/s", static_cast<int>(bytes_per_second));
-      } else if (bytes_per_second < 1024 * 1024) {
-        human_readable_speed = StrFormat(
-            "%.1fkB/s", bytes_per_second / 1024.0f);
-      } else if (bytes_per_second < 1024 * 1024 * 1024) {
-        human_readable_speed = StrFormat(
-            "%.1fMB/s", bytes_per_second / (1024.0f * 1024.0f));
-      } else {
-        human_readable_speed = StrFormat(
-            "%.1fGB/s", bytes_per_second / (1024.0f * 1024.0f * 1024.0f));
-      }
-    }
-
-    std::fprintf(stderr,
-#ifdef WIN32
-            "%-18s %10I64d %10I64d %10d %s  %s\n",
-#else
-            "%-18s %10lld %10lld %10d %s  %s\n",
-#endif
-            heading.c_str(),
-            static_cast<long long>(real_time_us * 1000 / num_iterations),
-            static_cast<long long>(cpu_time_us * 1000 / num_iterations),
-            num_iterations,
-            human_readable_speed.c_str(),
-            benchmark_label->c_str());
-  }
-}
-
 #ifdef HAVE_LIBZ
 
 ZLib::ZLib()