| 1 | // ==================================================================== // |
|---|
| 2 | // // |
|---|
| 3 | // File : perf_timer.h // |
|---|
| 4 | // Purpose : Simple performance timer using clock() // |
|---|
| 5 | // Time-stamp: <Thu Nov/18/2004 13:55 MET Coder@ReallySoft.de> // |
|---|
| 6 | // // |
|---|
| 7 | // // |
|---|
| 8 | // Coded by Ralf Westram (coder@reallysoft.de) in November 2004 // |
|---|
| 9 | // Copyright Department of Microbiology (Technical University Munich) // |
|---|
| 10 | // // |
|---|
| 11 | // Visit our web site at: http://www.arb-home.de/ // |
|---|
| 12 | // // |
|---|
| 13 | // ==================================================================== // |
|---|
| 14 | #ifndef PERF_TIMER_H |
|---|
| 15 | #define PERF_TIMER_H |
|---|
| 16 | |
|---|
| 17 | #ifndef _CPP_STRING |
|---|
| 18 | #include <string> |
|---|
| 19 | #endif |
|---|
| 20 | #ifndef _CPP_CSTDIO |
|---|
| 21 | #include <cstdio> |
|---|
| 22 | #endif |
|---|
| 23 | #ifndef _CPP_CTIME |
|---|
| 24 | #include <ctime> |
|---|
| 25 | #endif |
|---|
| 26 | |
|---|
| 27 | class PerfTimer { |
|---|
| 28 | clock_t started_at; |
|---|
| 29 | unsigned long loop_counter; |
|---|
| 30 | std::string message; |
|---|
| 31 | |
|---|
| 32 | public: |
|---|
| 33 | |
|---|
| 34 | PerfTimer(const std::string& message_) |
|---|
| 35 | : started_at(clock()) |
|---|
| 36 | , loop_counter(0) |
|---|
| 37 | , message(message_) |
|---|
| 38 | {} |
|---|
| 39 | |
|---|
| 40 | ~PerfTimer() { |
|---|
| 41 | clock_t stopped_at = clock(); |
|---|
| 42 | clock_t ticks = stopped_at-started_at; |
|---|
| 43 | double seconds = double(ticks)/CLOCKS_PER_SEC; |
|---|
| 44 | |
|---|
| 45 | printf("Time for '%s': ticks=%lu (= %5.2f seconds)", |
|---|
| 46 | message.c_str(), ticks, seconds); |
|---|
| 47 | |
|---|
| 48 | if (loop_counter > 0) { // loop timer |
|---|
| 49 | if (loop_counter == 1) { |
|---|
| 50 | printf(" 1 loop"); |
|---|
| 51 | } |
|---|
| 52 | else { |
|---|
| 53 | double lticks = double(ticks)/loop_counter; |
|---|
| 54 | double lseconds = lticks/CLOCKS_PER_SEC; |
|---|
| 55 | |
|---|
| 56 | printf(" %lu loops. Each took: ticks=%lu", |
|---|
| 57 | loop_counter, (clock_t)(lticks+0.5)); |
|---|
| 58 | if (lseconds >= 0.01) { |
|---|
| 59 | printf(" (= %5.2f seconds)", lseconds); |
|---|
| 60 | } |
|---|
| 61 | else { |
|---|
| 62 | printf(" (= %5.2f milliseconds)", lseconds/1000); |
|---|
| 63 | } |
|---|
| 64 | |
|---|
| 65 | double loopsPerSecond = loop_counter/seconds; |
|---|
| 66 | printf(" = %5.2f loops/second", loopsPerSecond); |
|---|
| 67 | } |
|---|
| 68 | } |
|---|
| 69 | printf("\n"); |
|---|
| 70 | } |
|---|
| 71 | |
|---|
| 72 | void announceLoop() { loop_counter++; } |
|---|
| 73 | }; |
|---|
| 74 | |
|---|
| 75 | |
|---|
| 76 | |
|---|
| 77 | #else |
|---|
| 78 | #error perf_timer.h included twice |
|---|
| 79 | #endif // PERF_TIMER_H |
|---|
| 80 | |
|---|
