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[common/logging] eliminate uneeded std::string{} allocations per each logging (#4273)

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Signed-off-by: lizzie <lizzie@eden-emu.dev>

- [x] I have read and followed the [Contribution Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/CONTRIBUTING.md#code-contributions).
- [x] I have read and followed the [AI Policy](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/AI.md)
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-------------------

the idea is simple, `std::string{}` adds pressure to the memory allocator
so whats the best next thing we can do? well of course use our stack
its plenty, but we shouldn't be greedy either, BUFSIZ should be a fair amount of
space for any would-be messages anyways

the main idea behind this PR is to remove std::string{} allocations
done with libfmt, that way we have 0-allocs per logging entry
this should 100% remove pressure uneeded from the memory allocator
we should only allocate things that are important, we can use our
trusty fast stack for any string manip we need to do
not await/global lock or do evil things with the memory allocator

obviously stack is thread local already sooo... this is even better
than having to deal with malloc()/free() in any capacity whatsoever

and no clang can't heap ellide this (how would you even?)

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4273
Reviewed-by: Maufeat <sahyno1996@gmail.com>
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
This commit is contained in:
lizzie
2026-08-23 22:37:17 +02:00
committed by crueter
parent 421e0b834c
commit b610b03d29
2 changed files with 56 additions and 66 deletions
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src/common/logging.h
-21
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@@ -140,25 +140,4 @@ void Stop();
void SetGlobalFilter(const Filter& filter);
void SetColorConsoleBackendEnabled(bool enabled);
/// @brief A log entry. Log entries are store in a structured format to permit more varied output
/// formatting on different frontends, as well as facilitating filtering and aggregation.
struct Entry {
std::string message;
std::chrono::microseconds timestamp;
Class log_class{};
Level log_level{};
const char* filename = nullptr;
const char* function = nullptr;
unsigned int line_num = 0;
};
/// Formats a log entry into the provided text buffer.
std::string FormatLogMessage(const Entry& entry) noexcept;
/// Prints the same message as `PrintMessage`, but colored according to the severity level.
void PrintColoredMessage(const Entry& entry) noexcept;
/// Formats and prints a log entry to the android logcat.
void PrintMessageToLogcat(const Entry& entry) noexcept;
} // namespace Common::Log