kc3-lang/angle/src/tests/perf_tests/BitSetIteratorPerf.cpp

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• Author : Jamie Madill
  Date : 2017-04-12 09:53:01
  Hash : 6de51858
  Message : Optimize angle::BitSetIterator. Adds a new custom bitset template to handle packing as many bits as possible into a single variable. Intelligently select the right class depending on platform features and bit sizes. For now, always use a packed 64-bit set on 64-bit, instead of using a 32-bit set for smaller bitsets. BUG=angleproject:1814 Change-Id: I3ffef815c15515555833f6fc9302d8a4eee5423b Reviewed-on: https://chromium-review.googlesource.com/471827 Reviewed-by: Geoff Lang <geofflang@chromium.org> Reviewed-by: Corentin Wallez <cwallez@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>

• src/tests/perf_tests/BitSetIteratorPerf.cpp

• //
  // Copyright 2015 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  // IndexDataManagerPerfTest:
  //   Performance test for index buffer management.
  //
  
  #include "ANGLEPerfTest.h"
  
  #include <gmock/gmock.h>
  
  #include "angle_unittests_utils.h"
  #include "common/bitset_utils.h"
  
  using namespace testing;
  
  namespace
  {
  
  template <typename T>
  class BitSetIteratorPerfTest : public ANGLEPerfTest
  {
    public:
      BitSetIteratorPerfTest();
  
      void step() override;
  
      T mBits;
  };
  
  template <typename T>
  BitSetIteratorPerfTest<T>::BitSetIteratorPerfTest() : ANGLEPerfTest("BitSetIteratorPerf", "_run")
  {
  }
  
  template <typename T>
  void BitSetIteratorPerfTest<T>::step()
  {
      mBits.flip();
  
      for (size_t bit : mBits)
      {
          UNUSED_VARIABLE(bit);
      }
  
      mBits.reset();
  }
  
  // These type names unfortunately don't get printed correctly in Gtest.
  #if defined(ANGLE_X64_CPU)
  using TestTypes = Types<angle::IterableBitSet<32>, angle::BitSet32<32>, angle::BitSet64<32>>;
  #else
  using TestTypes = Types<angle::IterableBitSet<32>, angle::BitSet32<32>>;
  #endif  // defined(ANGLE_X64_CPU)
  TYPED_TEST_CASE(BitSetIteratorPerfTest, TestTypes);
  
  TYPED_TEST(BitSetIteratorPerfTest, Run)
  {
      this->run();
  }
  
  }  // anonymous namespace