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Why moving logging to another thread doesn’t make it cheaper — and where the cost really goes Async logging is often treated as an obvious optimization. It isn’t. It just moves the cost somewhere else. This idea sounds simple: synchronous logging blocks, async logging doesn’t — so it must be faster. But once you look

We benchmarked several C++ logging libraries to understand C++ logging performance and answer a simple question: How much does a single logging call actually cost? Logging appears in almost every C++ project. Almost any service, daemon, or library eventually accumulates lines such as LOG_INFO(...) or logger.debug(...). Most of the time, a logging library is chosen based on habit, ecosystem,