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regex_timer.cpp:

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- Head off some infinite looping on some platforms


[SVN r12550]
This commit is contained in:
Douglas Gregor
2002-01-29 13:38:30 +00:00
parent c07c4e0a11
commit 6463dcfb07
1 changed files with 7 additions and 3 deletions
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10
example/timer/regex_timer.cpp
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@ -188,6 +188,7 @@ int main(int argc, char**argv)
regex_search(s2, sm, ex); regex_search(s2, sm, ex);
// measure time interval for reg_expression<char> // measure time interval for reg_expression<char>
int trials = 30;
do{ do{
iters *= (tim > 0.001) ? (1.1/tim) : 100; iters *= (tim > 0.001) ? (1.1/tim) : 100;
t.restart(); t.restart();
@ -196,7 +197,7 @@ int main(int argc, char**argv)
result = regex_search(s2, sm, ex); result = regex_search(s2, sm, ex);
} }
tim = t.elapsed(); tim = t.elapsed();
}while((tim < t.elapsed_min() * 1000) || (tim < 1)); }while(((tim < t.elapsed_min() * 1000) || (tim < 1)) && trials--);
cout << "regex time: " << (tim * 1000000 / iters) << "us" << endl; cout << "regex time: " << (tim * 1000000 / iters) << "us" << endl;
if(result) if(result)
@ -258,6 +259,7 @@ int main(int argc, char**argv)
// measure time interval for reg_expression<char> using a deque // measure time interval for reg_expression<char> using a deque
iters = 10; iters = 10;
tim = 1.1; tim = 1.1;
trials = 30;
// cache load: // cache load:
regex_search(ds.begin(), ds.end(), dm, ex); regex_search(ds.begin(), ds.end(), dm, ex);
do{ do{
@ -268,7 +270,7 @@ int main(int argc, char**argv)
result = regex_search(ds.begin(), ds.end(), dm, ex); result = regex_search(ds.begin(), ds.end(), dm, ex);
} }
tim = t.elapsed(); tim = t.elapsed();
}while((tim < t.elapsed_min() * 1000) || (tim < 1)); }while(((tim < t.elapsed_min() * 1000) || (tim < 1)) && trials--);
cout << "regex time (search over std::deque<char>): " << (tim * 1000000 / iters) << "us" << endl; cout << "regex time (search over std::deque<char>): " << (tim * 1000000 / iters) << "us" << endl;
if(result) if(result)
@ -295,6 +297,7 @@ int main(int argc, char**argv)
// measure time interval for POSIX matcher: // measure time interval for POSIX matcher:
iters = 10; iters = 10;
tim = 1.1; tim = 1.1;
trials = 30;
// cache load: // cache load:
regexec(&r, s2.c_str(), nsubs, matches.get(), 0); regexec(&r, s2.c_str(), nsubs, matches.get(), 0);
do{ do{
@ -302,10 +305,11 @@ int main(int argc, char**argv)
t.restart(); t.restart();
for(i = 0; i < iters; ++i) for(i = 0; i < iters; ++i)
{ {
std::cerr << "Iteration #" << i << "/" << iters << std::endl;
result = regexec(&r, s2.c_str(), nsubs, matches.get(), 0); result = regexec(&r, s2.c_str(), nsubs, matches.get(), 0);
} }
tim = t.elapsed(); tim = t.elapsed();
}while((tim < t.elapsed_min() * 1000) || (tim < 1)); }while(((tim < t.elapsed_min() * 1000) || (tim < 1)) && trials--);
cout << "POSIX regexec time: " << (tim * 1000000 / iters) << "us" << endl; cout << "POSIX regexec time: " << (tim * 1000000 / iters) << "us" << endl;
if(result == 0) if(result == 0)