benchmark folder has been removed from the root dir, README update, measure_time.hpp comments

README.md

@@ -14,82 +14,10 @@ Some code contains linux-specific libraries and the build is only supported
 on a 64 bit linux kernel.
 
 * linux
-* clang 3.5 or Gcc 4.8 (good c++11 support, especially lock free atomics)
-* boost 1.55 (or something, probably works with almost anything)
-* lexertl (2015-07-14)
-* lemon (parser generator)
-* catch (for compiling tests)
-
-### Bolt
-
-sudo apt-get install libssl-dev
-
-## build
-```
-cd build
-cmake -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ -DRUNTIME_ASSERT=OFF -DTHROW_EXCEPTION_ON_ERROR=OFF -DNDEBUG=OFF ..
-
-# Flags:
-#   -DCMAKE_C_COMPILER=clang
-#   -DCMAKE_CXX_COMPILER=clang++
-#   -DRUNTIME_ASSERT=OFF
-#   -DTHROW_EXCEPTION_ON_ERROR=OFF
-#   -DNDEBUG=ON
-#   -DCMAKE_BUILD_TYPE:STRING=debug
-#   -DCMAKE_BUILD_TYPE:STRING=release
-
-make
-ctest
-ctest -V
-ctest -R test_name
-ctest -R unit
-ctest -R concurrent
-ctest -R concurrent --parallel 4
-```
-
-## Proof of concept
-
-### Dressipi
-
-Run command:
-```
-cd build/poc
-MEMGRAPH_CONFIG=/path/to/config/memgraph.yaml ./poc_astar -v "dressipi/graph_nodes_export.csv" -e "dressipi/graph_edges_export.csv"
-```
-
-### Powerlinx
-
-Run command:
-```
-cd build/poc
-MEMGRAPH_CONFIG=/path/to/config/memgraph.yaml ./profile -d ";" -v "node_account.csv" -v "node_company.csv" -v "node_opportunity.csv"  -v "node_personnel.csv" -e "rel_created.csv" -e "rel_has_match.csv" -e "rel_interested_in.csv" -e "rel_is_employee.csv" -e "rel_partnered_with.csv" -e "rel_reached_to.csv" -e "rel_searched_and_clicked.csv" -e "rel_viewed.csv" -e "rel_works_in.csv"
-```
-
-# Custom test build example
-clang++ -std=c++1y -o concurrent_skiplist ../tests/concurrent/skiplist.cpp -pg -I../src/ -I../libs/fmt -Lfmt-prefix/src/fmt-build/fmt -lfmt -lpthread
-
-# TODO
-* implement basic subset of queries:
-    * create node
-    * create edge
-    * find node
-    * find edge
-    * update node
-    * update edge
-    * delete node
-    * delete edge
-
-* implement index
-    * label index
-    * type index
-    * property index
-
-* from header only approach to .hpp + .cpp
-    * query engine has to be statically linked with the rest of the code
-
-* unit test of queries that are manually implemented
-    * src/query_engine/main_queries.cpp -> tests/unit/manual_queries
-
-* unit test of query_engine
-
-* console with history
+* clang 3.8 (good c++11 support, especially lock free atomics)
+* antlr (compiler frontend)
+* cppitertools
+* fmt format
+* google benchmark
+* google test
+* yaml-cpp

benchmark/.gitignore

@@ -1 +0,0 @@
-*.out

benchmark/allocator.cpp

@@ -1,58 +0,0 @@
-#include <iostream>
-
-#include <vector>
-#include <thread>
-
-#include "utils/memory/allocator.hpp"
-#include "utils/memory/maker.hpp"
-
-struct TestStruct
-{
-    TestStruct(int a, int b, int c, int d)
-        : a(a), b(b), c(c), d(d) {}
-
-    int a, b, c, d;
-};
-
-void test_classic(int N)
-{
-    TestStruct** xs = new TestStruct*[N];
-
-    for(int i = 0; i < N; ++i)
-        xs[i] = new TestStruct(i, i, i, i);
-
-    for(int i = 0; i < N; ++i)
-        delete xs[i];
-
-    delete[] xs;
-}
-
-void test_fast(int N)
-{
-    TestStruct** xs = new TestStruct*[N];
-
-    for(int i = 0; i < N; ++i)
-        xs[i] = makeme<TestStruct>(i, i, i, i);
-
-    for(int i = 0; i < N; ++i)
-        delete xs[i];
-
-    delete[] xs;
-}
-
-int main(void)
-{
-    constexpr int n_threads = 256;
-    constexpr int N = 80000000 / n_threads;
-
-    std::vector<std::thread> threads;
-
-    for(int i = 0; i < n_threads; ++i)
-        threads.push_back(std::thread(test_fast, N));
-
-    for(auto& thread : threads){
-        thread.join();
-    }
-
-    return 0;
-}

requirements.txt

@@ -1 +0,0 @@
-neo4j-driver==1.0.2

src/test/all.cpp

@@ -1,2 +0,0 @@
-#define CATCH_CONFIG_MAIN
-#include "catch.hpp"

src/test/dynamic_bitset.cpp

@@ -1,17 +0,0 @@
-#include "data_structures/bitset/dynamic_bitset.hpp"
-#include "catch.hpp"
-
-TEST_CASE("Dynamic bitset basic functionality") {
-  DynamicBitset<> db;
-  db.set(222555, 1);
-  bool value = db.at(222555, 1);
-  REQUIRE(value == true);
-
-  db.set(32, 1);
-  value = db.at(32, 1);
-  REQUIRE(value == true);
-
-  db.clear(32, 1);
-  value = db.at(32, 1);
-  REQUIRE(value == false);
-}

src/utils/measure_time.hpp

@@ -0,0 +1,95 @@
+#pragma once
+
+#include <chrono>
+#include <ratio>
+#include <utility>
+
+namespace utils {
+
+using ms = std::chrono::milliseconds;
+
+/**
+ * Casts the time difference into DurationUnit (default values is
+ * std::chrono::nanoseconds).
+ *
+ * @tparam DurationUnit type of return value
+ * @param delta time difference
+ * @return time difference in DurationUnit
+ */
+template <typename DurationUnit = std::chrono::nanoseconds>
+auto to_duration(const std::chrono::duration<long, std::nano> &delta) {
+  return std::chrono::duration_cast<DurationUnit>(delta).count();
+}
+
+/**
+ * Measures time for the function call.
+ *
+ * @tparam DurationUnit unit of returned value
+ * @param func function to execute
+ * @param args function arguments
+ * @return duration of a function call
+ */
+template <typename DurationUnit, typename F, typename... Args>
+auto measure_time(F func, Args &&... args) {
+  auto start_time = std::chrono::high_resolution_clock::now();
+  func(std::forward<Args>(args)...);
+  return to_duration<DurationUnit>(std::chrono::high_resolution_clock::now() -
+                                   start_time);
+}
+
+/**
+ * @brief Stopwatch
+ *
+ * idea from Optimized C++ Kurt Guntheroth 2016
+ *
+ * The instance of this class can return delta time from a single start point.
+ * The start point in time is stored within the object.
+ */
+class Stopwatch {
+ public:
+  /**
+   * Initializes start point to system clock min.
+   */
+  Stopwatch() : start_(std::chrono::system_clock::time_point::min()) {}
+
+  /**
+   * Set start point to system clock min.
+   */
+  void Clear() { start_ = std::chrono::system_clock::time_point::min(); }
+
+  /**
+   * If start isn't system clock min than the Stopwatch has been started.
+   *
+   * @return bool is the Stopwatch started.
+   */
+  auto IsStarted() const {
+    return (start_ != std::chrono::system_clock::time_point::min());
+  }
+
+  /**
+   * Set start point to the current time.
+   */
+  void Start() { start_ = std::chrono::system_clock::now(); }
+
+  /**
+   * @return elapsed time in milliseconds
+   *    if the Stopwatch isn't active returns 0
+   */
+  auto GetMs() {
+    if (IsStarted()) {
+      std::chrono::system_clock::duration diff;
+      diff = std::chrono::system_clock::now() - start_;
+      return std::chrono::duration_cast<std::chrono::milliseconds>(diff);
+    }
+    return std::chrono::milliseconds(0);
+  }
+
+  /**
+   * Empty destructor.
+   */
+  ~Stopwatch() {}
+
+ private:
+  std::chrono::system_clock::time_point start_;
+};
+}

src/utils/time/time.hpp

@@ -1,7 +0,0 @@
-#pragma once
-
-#include <chrono>
-
-using namespace std::chrono_literals;
-
-using ms = std::chrono::milliseconds;

src/utils/time/timer.hpp

@@ -1,51 +0,0 @@
-#pragma once
-
-#include <iostream>
-#include <ratio>
-#include <utility>
-
-#include "utils/time/time.hpp"
-
-#define time_now() std::chrono::high_resolution_clock::now()
-
-template <typename DurationUnit = std::chrono::nanoseconds>
-auto to_duration(const std::chrono::duration<long, std::nano> &delta) {
-  return std::chrono::duration_cast<DurationUnit>(delta).count();
-}
-
-template <typename DurationUnit, typename F, typename... Args>
-auto timer(F func, Args &&... args) {
-  auto start_time = time_now();
-  func(std::forward<Args>(args)...);
-  return to_duration<DurationUnit>(time_now() - start_time);
-}
-
-// idea from Optimized C++ Kurt Guntheroth 2016
-// TODO: make more modular and easier to use
-class Stopwatch {
- public:
-  Stopwatch() : start(std::chrono::system_clock::time_point::min()) {}
-
-  void Clear() { start = std::chrono::system_clock::time_point::min(); }
-
-  bool IsStarted() const {
-    return (start != std::chrono::system_clock::time_point::min());
-  }
-
-  void Start() { start = std::chrono::system_clock::now(); }
-
-  unsigned long GetMs() {
-    if (IsStarted()) {
-      std::chrono::system_clock::duration diff;
-      diff = std::chrono::system_clock::now() - start;
-      return (unsigned)(std::chrono::duration_cast<ms>(diff).count());
-    }
-
-    return 0;
-  }
-
-  ~Stopwatch() { std::cout << "Time: " << GetMs() << "ms" << std::endl; }
-
- private:
-  std::chrono::system_clock::time_point start;
-};

src/utils/timer/timer.hpp

@@ -8,12 +8,15 @@
 
 #include "logging/default.hpp"
 
+namespace utils {
+
 /**
  * @class Timer
  *
- * @brief The timer contains counter and handler.
+ * @brief The timer contains counter and handler which is executed when the time
+ * exceedes.
  *
- * With every clock interval the counter should be decresed for
+ * With every clock interval the counter should be decreased for
  * delta count. Delta count is one for now but it should be a variable in the
  * near future. The handler is function that will be called when counter
  * becomes zero or smaller than zero.
@@ -151,3 +154,4 @@ class TimerScheduler {
   std::thread run_thread;
   std::atomic<bool> is_running;
 };
+}

tests/benchmark/allocator.cpp

@@ -0,0 +1,58 @@
+#include <iostream>
+
+#include <thread>
+#include <vector>
+
+#include "utils/assert.hpp"
+#include "utils/measure_time.hpp"
+#include "utils/memory/allocator.hpp"
+#include "utils/memory/maker.hpp"
+
+struct TestStructure {
+  TestStructure(int a, int b, int c, int d) : a(a), b(b), c(c), d(d) {}
+  int a, b, c, d;
+};
+
+void test_classic(int N) {
+  TestStructure** xs = new TestStructure*[N];
+  for (int i = 0; i < N; ++i) xs[i] = new TestStructure(i, i, i, i);
+  for (int i = 0; i < N; ++i) delete xs[i];
+  delete[] xs;
+}
+
+void test_fast(int N) {
+  TestStructure** xs = new TestStructure*[N];
+  for (int i = 0; i < N; ++i) xs[i] = makeme<TestStructure>(i, i, i, i);
+  for (int i = 0; i < N; ++i) delete xs[i];
+  delete[] xs;
+}
+
+int main(void) {
+  constexpr int n_threads = 32;
+  constexpr int N = 80000000 / n_threads;
+
+  auto elapsed_classic = utils::measure_time<std::chrono::milliseconds>([&]() {
+    std::vector<std::thread> threads;
+    for (int i = 0; i < n_threads; ++i)
+      threads.push_back(std::thread(test_classic, N));
+    for (auto& thread : threads) {
+      thread.join();
+    }
+  });
+  std::cout << "Classic (new): " << elapsed_classic << "ms" << std::endl;
+
+  auto elapsed_fast = utils::measure_time<std::chrono::milliseconds>([&]() {
+    std::vector<std::thread> threads;
+    for (int i = 0; i < n_threads; ++i)
+      threads.push_back(std::thread(test_fast, N));
+    for (auto& thread : threads) {
+      thread.join();
+    }
+  });
+  std::cout << "Fast (fast allocator): " << elapsed_fast << "ms" << std::endl;
+  permanent_assert(elapsed_fast < elapsed_classic,
+                   "Custom fast allocator "
+                   "has to perform faster on simple array allocation");
+
+  return 0;
+}

tests/benchmark/query/strip/stripper.cpp

@@ -1,8 +1,8 @@
+#define LOG_NO_INFO 1
+
 #include "logging/default.hpp"
 #include "logging/streams/stdout.hpp"
 #include "query/preprocessor.hpp"
-#include "utils/time/timer.hpp"
-
 #include "benchmark/benchmark_api.h"
 #include "yaml-cpp/yaml.h"
 

tests/concurrent/measure_time.cpp

@@ -8,6 +8,7 @@
 #include "utils/timer/timer.hpp"
 
 using namespace std::chrono_literals;
+using namespace utils;
 
 /**
  * Creates a test timer which will log timeout message at the timeout event.