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Speed up pattern_formatter

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This commit is contained in:
gabime 2018-06-13 18:47:02 +03:00
parent 3f438a8084
commit 2989e998ee
1 changed files with 65 additions and 15 deletions
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80
include/spdlog/details/pattern_formatter_impl.h
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@ -20,7 +20,7 @@
#include <utility>
#include <vector>
namespace {
namespace { // Some fmt helpers to efficiently format and pad ints and strings
inline void append_str(const std::string &str, fmt::memory_buffer &dest)
{
const char *str_ptr = str.data();
@ -47,35 +47,87 @@ inline void append_size_t(size_t n, fmt::memory_buffer &dest)
inline void append_and_pad2(int n, fmt::memory_buffer &dest)
{
if (n < 0) // should not happen in this formatter, but just in case, let fmt deal with negatives correctly
if (n > 9)
{
fmt::format_to(dest, "{:02}", n);
append_int(n, dest);
return;
}
if (n < 10)
if (n >= 0) // 0-9
{
dest.push_back('0');
append_int(n, dest);
return;
}
append_int(n, dest);
// negatives (unlikely but just in case, let fmt deal with it)
fmt::format_to(dest, "{:02}", n);
}
inline void append_and_pad3(int n, fmt::memory_buffer &dest)
{
if (n < 0) // should not happen in this formatter, but just in case, let fmt deal with negatives correctly
if (n > 99)
{
fmt::format_to(dest, "{:03}", n);
append_int(n, dest);
return;
}
if (n < 10)
if (n > 9) // 10-99
{
dest.push_back('0');
append_int(n, dest);
return;
}
if (n >= 0)
{
dest.push_back('0');
dest.push_back('0');
append_int(n, dest);
return;
}
// negatives (unlikely, but just in case let fmt deal with it)
fmt::format_to(dest, "{:03}", n);
}
void append_and_pad6(int n, fmt::memory_buffer &dest)
{
if (n > 99999)
{
append_int(n, dest);
return;
}
if (n > 9999)
{
dest.push_back('0');
}
else if (n > 999)
{
dest.push_back('0');
dest.push_back('0');
}
else if (n < 100)
else if (n > 99)
{
dest.push_back('0');
dest.push_back('0');
dest.push_back('0');
}
else if (n > 9)
{
dest.push_back('0');
dest.push_back('0');
dest.push_back('0');
dest.push_back('0');
}
else if (n >= 0)
{
dest.push_back('0');
dest.push_back('0');
dest.push_back('0');
dest.push_back('0');
dest.push_back('0');
}
else // negatives (unlikely, but just in case let fmt deal with it)
{
fmt::format_to(dest, "{:06}", n);
return;
}
append_int(n, dest);
}
@ -309,7 +361,7 @@ class f_formatter SPDLOG_FINAL : public flag_formatter
{
auto duration = msg.time.time_since_epoch();
auto micros = std::chrono::duration_cast<std::chrono::microseconds>(duration).count() % 1000000;
fmt::format_to(msg.formatted, "{:06}", static_cast<int>(micros));
append_and_pad6(static_cast<int>(micros), msg.formatted);
}
};
@ -544,9 +596,7 @@ class full_formatter SPDLOG_FINAL : public flag_formatter
// tm_time.tm_mday, tm_time.tm_hour, tm_time.tm_min, tm_time.tm_sec, static_cast<int>(millis));
msg.formatted.push_back('[');
fmt::format_int i(tm_time.tm_year + 1900);
msg.formatted.append(i.data(), i.data() + i.size());
append_int(tm_time.tm_year + 1900, msg.formatted);
msg.formatted.push_back('-');
append_and_pad2(tm_time.tm_mon + 1, msg.formatted);