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Added vector_scale timing benchmarks

release/4.3a0
Alex Cunningham 2010-01-20 01:05:40 +00:00
parent ff83a7b18e
commit 66607897a5
1 changed files with 71 additions and 4 deletions
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75
cpp/timeMatrix.cpp
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@ -14,8 +14,8 @@ using namespace gtsam;
/*
* Results:
* Alex's Machine:
* - no pass: 0.1818 sec
* - pass : 0.1802 sec
* - no pass: 0.184 sec
* - pass : 0.181 sec
*/
double timeCollect(size_t p, size_t m, size_t n, bool passDims, size_t reps) {
// create a large number of matrices
@ -54,6 +54,64 @@ double timeCollect(size_t p, size_t m, size_t n, bool passDims, size_t reps) {
return elapsed/reps;
}
/*
* Results:
* Alex's Machine:
* - Original: 0.60 sec (x1000)
*/
double timeVScaleColumn(size_t m, size_t n, size_t reps) {
// make a matrix to scale
Matrix M(m, n);
for (int i=0; i<m; ++i)
for (int j=0; j<n; ++j)
M(i,j) = 2*i+j;
// make a vector to use for scaling
Vector V(m);
for (int i=0; i<m; ++i)
V(i) = i*2;
double elapsed;
Matrix result;
{
boost::timer t;
for (int i=0; i<reps; ++i)
Matrix result = vector_scale(M,V);
elapsed = t.elapsed();
}
return elapsed;
}
/*
* Results:
* Alex's Machine:
* - Original: 0.54 sec (x1000)
*/
double timeVScaleRow(size_t m, size_t n, size_t reps) {
// make a matrix to scale
Matrix M(m, n);
for (int i=0; i<m; ++i)
for (int j=0; j<n; ++j)
M(i,j) = 2*i+j;
// make a vector to use for scaling
Vector V(n);
for (int i=0; i<n; ++i)
V(i) = i*2;
double elapsed;
Matrix result;
{
boost::timer t;
for (int i=0; i<reps; ++i)
Matrix result = vector_scale(V,M);
elapsed = t.elapsed();
}
return elapsed;
}
int main(int argc, char ** argv) {
// Time collect()
@ -61,10 +119,19 @@ int main(int argc, char ** argv) {
size_t p = 100000; size_t m = 10; size_t n = 12; size_t reps = 50;
double collect_time1 = timeCollect(p, m, n, false, reps);
double collect_time2 = timeCollect(p, m, n, true, reps);
cout << "Elapsed time for collect (no pass) [" << p << " (" << m << ", " << n << ") matrices] : " << collect_time1 << endl;
cout << "Elapsed time for collect (pass) [" << p << " (" << m << ", " << n << ") matrices] : " << collect_time2 << endl;
cout << "Average Elapsed time for collect (no pass) [" << p << " (" << m << ", " << n << ") matrices] : " << collect_time1 << endl;
cout << "Average Elapsed time for collect (pass) [" << p << " (" << m << ", " << n << ") matrices] : " << collect_time2 << endl;
// Time vector_scale_column
cout << "Starting Matrix::vector_scale(column) Timing" << endl;
size_t m1 = 400; size_t n1 = 480; size_t reps1 = 1000;
double vsColumn_time = timeVScaleColumn(m1, n1, reps1);
cout << "Elapsed time for vector_scale(column) [(" << m1 << ", " << n1 << ") matrix] : " << vsColumn_time << endl;
// Time vector_scale_row
cout << "Starting Matrix::vector_scale(row) Timing" << endl;
double vsRow_time = timeVScaleRow(m1, n1, reps1);
cout << "Elapsed time for vector_scale(row) [(" << m1 << ", " << n1 << ") matrix] : " << vsRow_time << endl;
return 0;
}