From 9f14a7d7cd2c8eb29af3e6cd4b6e06b71ca8c28a Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Sun, 5 Aug 2007 06:10:36 +0000
Subject: Added benchmark proving Raul::Table is slower than std::map and thus
 a useless piece of crap. Awesome.

git-svn-id: http://svn.drobilla.net/lad/raul@678 a436a847-0d15-0410-975c-d299462d15a1
---
 tests/Makefile.am    |   2 +-
 tests/table_test.cpp | 118 ++++++++++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 118 insertions(+), 2 deletions(-)

(limited to 'tests')

diff --git a/tests/Makefile.am b/tests/Makefile.am
index f18bcc9..0829d81 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -1,6 +1,6 @@
 if BUILD_TESTS
 
-AM_CXXFLAGS = -I.. -lpthread @REDLAND_CFLAGS@ @GLIBMM_CFLAGS@ -DTABLE_SORT_DEBUG
+AM_CXXFLAGS = -I.. -lpthread @REDLAND_CFLAGS@ @GLIBMM_CFLAGS@# -DTABLE_SORT_DEBUG
 ALL_LIBS = @REDLAND_LIBS@ @GLIBMM_LIBS@ ../src/libraul.la
 
 noinst_PROGRAMS = \
diff --git a/tests/table_test.cpp b/tests/table_test.cpp
index 19fd576..3c1462d 100644
--- a/tests/table_test.cpp
+++ b/tests/table_test.cpp
@@ -1,6 +1,8 @@
 #include <string>
 #include <iostream>
 #include <utility>
+#include <map>
+#include <sys/time.h>
 #include <raul/PathTable.hpp>
 #include <raul/Table.hpp>
 #include <raul/TableImpl.hpp>
@@ -17,10 +19,17 @@ bool range_comparator(const int& a, const int& b)
 	return ret;
 }
 
+void benchmark(size_t n);
 
 int
-main()
+main(int argc, char** argv)
 {
+	if (argc == 3 && !strcmp(argv[1], "-b")) {
+		benchmark(atoi(argv[2]));
+		return 0;
+	}
+
+	cout << "run with -b num_elems to benchmark" << endl;
 	srand(time(NULL));
 
 	range_end_val = rand()%10;
@@ -193,3 +202,110 @@ main()
 	return 0;
 }
 
+
+void
+benchmark(size_t n)
+{
+	cout << "Benchmarking with n = " << n << endl;
+
+	int useless_accumulator = 0;
+
+	srand(time(NULL));
+
+	vector<int> values(n);
+	for (size_t i=0; i < n; ++i)
+		values.push_back(rand() % n*100);
+
+	timeval t1;
+	t1.tv_sec=0;
+	t1.tv_usec=0;
+	
+	timeval t2;
+	t2.tv_sec=0;
+	t2.tv_usec=0;
+	
+
+	/** std::map **/
+
+	std::map<int,int> m;
+
+	gettimeofday(&t1, NULL);
+	
+	for (size_t i=0; i < n; ++i)
+		m.insert(make_pair(values[i], values[i]));
+	
+	gettimeofday(&t2, NULL);
+
+	float delta_t = (t2.tv_sec - t1.tv_sec) + (t2.tv_usec - t1.tv_usec) * 0.000001f;
+
+	cout << "std::map time to insert " << n << " values: \t" << delta_t << endl;
+	
+	gettimeofday(&t1, NULL);
+	
+	for (size_t i=0; i < n; ++i)
+		useless_accumulator += m.find(values[i])->second;
+	
+	gettimeofday(&t2, NULL);
+
+	delta_t = (t2.tv_sec - t1.tv_sec) + (t2.tv_usec - t1.tv_usec) * 0.000001f;
+
+	cout << "std::map time to lookup " << n << " values: \t" << delta_t << endl;
+	
+	
+	/** sorted std::vector **/
+
+	/*std::vector<int> v;
+
+	gettimeofday(&t1, NULL);
+	
+	for (size_t i=0; i < n; ++i)
+		v.push_back(values[i]);
+
+	sort(v.begin(), v.end());
+	
+	gettimeofday(&t2, NULL);
+
+	delta_t = (t2.tv_sec - t1.tv_sec) + (t2.tv_usec - t1.tv_usec) * 0.000001f;
+
+	cout << "std::vector (sorted) time to insert " << n << " values: \t" << delta_t << endl;
+	
+	gettimeofday(&t1, NULL);
+	
+	for (size_t i=0; i < n; ++i)
+		useless_accumulator += *lower_bound(v.begin(), v.end(), values[i]);
+	
+	gettimeofday(&t2, NULL);
+
+	delta_t = (t2.tv_sec - t1.tv_sec) + (t2.tv_usec - t1.tv_usec) * 0.000001f;
+
+	cout << "std::vector (sorted) time to lookup " << n << " values: \t" << delta_t << endl;*/
+
+
+	/** Raul::Table **/
+	
+	Raul::Table<int,int> t(n);
+	
+	gettimeofday(&t1, NULL);
+	
+	for (size_t i=0; i < n; ++i)
+		t.insert(make_pair(values[i], values[i]));
+	
+	gettimeofday(&t2, NULL);
+
+	delta_t = (t2.tv_sec - t1.tv_sec) + (t2.tv_usec - t1.tv_usec) * 0.000001f;
+
+	cout << "Raul::Table time to insert " << n << " values: " << delta_t << endl;
+	
+	gettimeofday(&t1, NULL);
+	
+	for (size_t i=0; i < n; ++i)
+		useless_accumulator += t.find(values[i])->second;
+	
+	gettimeofday(&t2, NULL);
+
+	delta_t = (t2.tv_sec - t1.tv_sec) + (t2.tv_usec - t1.tv_usec) * 0.000001f;
+
+	cout << "Raul::Table time to lookup " << n << " values: \t" << delta_t << endl;
+
+}
+
-- 
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