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cache sprintf of time in default formatter

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gabime
2014-03-04 00:08:30 +02:00
parent 344b3d2834
commit 2be33c19fc
4 changed files with 45 additions and 20 deletions
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27
include/c11log/formatter.h
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@@ -43,15 +43,20 @@ private:
inline void c11log::formatters::default_formatter::_format_time(const log_clock::time_point& tp, std::ostream &dest)
{
auto tm = details::os::localtime(log_clock::to_time_t(tp));
char buff[64];
int size = snprintf(buff, sizeof(buff), "[%d-%02d-%02d %02d:%02d:%02d]",
tm.tm_year + 1900,
tm.tm_mon + 1,
tm.tm_mday,
tm.tm_hour,
tm.tm_min,
tm.tm_sec);
dest.write(buff, size);
static thread_local std::tm last_tm = {0,0,0,0,0,0,0,0,0,0,0};
static thread_local char last_time_str[64];
auto tm_now = details::os::localtime(log_clock::to_time_t(tp));
if(last_tm != tm_now)
{
sprintf(last_time_str, "[%d-%02d-%02d %02d:%02d:%02d]",
tm_now.tm_year + 1900,
tm_now.tm_mon + 1,
tm_now.tm_mday,
tm_now.tm_hour,
tm_now.tm_min,
tm_now.tm_sec);
last_tm = tm_now;
}
dest << last_time_str;
}