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Research: Add cost analysis

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winlin 2020-12-22 19:24:35 +08:00
parent a4d1b3e2ca
commit c3938ddfd2
1 changed files with 13 additions and 0 deletions
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13
trunk/research/st/cost.cpp
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@ -49,6 +49,19 @@ int main(int argc, char** argv)
); );
} }
// The cost for loop.
if (true) {
int64_t start = srs_update_system_time();
for (long long i = 0; i < 1000000LL; i++);
int64_t ts_loop = srs_update_system_time();
for (long long i = 0; i < 10000000LL; i++);
int64_t ts_loop2 = srs_update_system_time();
printf("[COST] loop 100w=%dus, 1000w=%dus\n", srsu2i(ts_loop - start), srsu2i(ts_loop2 - ts_loop));
}
// The cost for printf. // The cost for printf.
if (true) { if (true) {
int64_t start = srs_update_system_time(); int64_t start = srs_update_system_time();