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Performance imporovement for Keep-Alive

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This commit is contained in:
yhirose 2024-09-05 23:58:34 -04:00
parent dfa641ca41
commit cb74e4191b
1 changed files with 22 additions and 4 deletions
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26
httplib.h
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@ -3191,18 +3191,36 @@ private:
#endif
inline bool keep_alive(socket_t sock, time_t keep_alive_timeout_sec) {
using namespace std::chrono;
auto timeout = keep_alive_timeout_sec * 1000;
auto start = steady_clock::now();
const auto timeout = keep_alive_timeout_sec * 1000;
#ifdef CPPHTTPLIB_USE_STEADY_TIMER_FOR_KEEP_ALIVE
const auto start = std::chrono::steady_clock::now();
#else
time_t elapse = 0;
#endif
while (true) {
auto val = select_read(sock, 0, 10000);
#ifndef CPPHTTPLIB_USE_STEADY_TIMER_FOR_KEEP_ALIVE
elapse += 12; // heuristic...
#endif
if (val < 0) {
return false;
} else if (val == 0) {
auto current = steady_clock::now();
#ifdef CPPHTTPLIB_USE_STEADY_TIMER_FOR_KEEP_ALIVE
auto current = std::chrono::steady_clock::now();
auto duration = duration_cast<milliseconds>(current - start);
if (duration.count() > timeout) { return false; }
#else
if (elapse > timeout) { return false; }
#endif
std::this_thread::sleep_for(std::chrono::milliseconds{10});
#ifndef CPPHTTPLIB_USE_STEADY_TIMER_FOR_KEEP_ALIVE
elapse += 12; // heuristic...
#endif
} else {
return true;
}