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default format_time performance improvement

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This commit is contained in:
gabime 2014-03-15 21:05:11 +02:00
parent 38670cef27
commit 9d9a955e94
4 changed files with 42 additions and 29 deletions
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2
example/example.cpp
View File

@ -33,7 +33,7 @@ int main(int argc, char* argv[])
auto start = system_clock::now();
const unsigned int howmany = 5000000;
const unsigned int howmany = 15000000;
for(unsigned int i = 0; i < howmany ; i++)
my_logger.info() << "Hello logger " << i;

6
include/c11log/details/fast_oss.h
View File

@ -27,7 +27,7 @@ public:
return _str;
}
void clear()
void reset_str()
{
_str.clear();
}
@ -68,6 +68,10 @@ public:
{
return _dev.str_ref();
}
void reset_str()
{
_dev.reset_str();
}
private:
str_devicebuf _dev;

4
include/c11log/details/line_logger.h
View File

@ -42,9 +42,7 @@ public:
// The move ctor should only be called on start of logging line,
// where no logging happened yet for this line so no need to copy the string from the other
_oss(),
_level(other._level)
{
};
_level(other._level) {};
~line_logger()

59
include/c11log/formatter.h
View File

@ -6,9 +6,11 @@
#include <sstream>
#include <iomanip>
#include <thread>
#include <cstdlib>
#include "common_types.h"
#include "details/os.h"
#include "details/fast_oss.h"
namespace c11log
{
@ -35,7 +37,7 @@ public:
{
_format_time(tp, dest);
if(!logger_name.empty())
dest << " [" << logger_name << ":" << c11log::level::to_str(level) << "] ";
dest << " [" << logger_name << ':' << c11log::level::to_str(level) << "] ";
else
dest << " [" << c11log::level::to_str(level) << "] ";
@ -48,35 +50,44 @@ private:
} //namespace c11log
// Format datetime like this: [2014-03-14 17:15:22]
inline void c11log::formatters::default_formatter::_format_time(const log_clock::time_point& tp, std::ostream &dest)
{
using namespace c11log::details::os;
using namespace std::chrono;
#ifdef _MSC_VER
__declspec(thread) static std::tm last_tm = { 0, 0, 0, 0, 0, 0, 0, 0, 0};
__declspec(thread) static char last_time_str[64];
__declspec(thread) static std::tm s_last_tm = { 0, 0, 0, 0, 0, 0, 0, 0, 0};
__declspec(thread) static details::fast_oss s_time_oss;
#else
thread_local static std::tm last_tm = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
thread_local static char last_time_str[64];
thread_local static details::fast_oss s_time_oss;
thread_local static std::time_t s_cache_time_t = 0;
#endif
auto tm_now = details::os::localtime(log_clock::to_time_t(tp));
using namespace c11log::details::os;
if(last_tm != tm_now)
{
#ifdef _MSC_VER
::sprintf_s
#else
::snprintf
#endif
(last_time_str, sizeof(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;
std::time_t tp_time_t = log_clock::to_time_t(tp);
//Cache every second
if(tp_time_t != s_cache_time_t)
{
auto tm_now = details::os::localtime(tp_time_t);
s_time_oss.reset_str();
s_time_oss.fill('0');
s_time_oss << '[' << tm_now.tm_year + 1900 << '-';
s_time_oss.width(2);
s_time_oss << tm_now.tm_mon + 1 << '-';
s_time_oss.width(2);
s_time_oss << tm_now.tm_mday << ' ';
s_time_oss.width(2);
s_time_oss << tm_now.tm_hour << ':';
s_time_oss.width(2);
s_time_oss << tm_now.tm_min << ':';
s_time_oss.width(2);
s_time_oss << tm_now.tm_sec << ']';
s_cache_time_t = tp_time_t;
}
dest << last_time_str;
const std::string &s = s_time_oss.str_ref();
dest.write(s.c_str(), s.size());
}