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/// @startDocuBlock logPerformance
/// @brief performance logging
/// --log.performance
///
/// If this option is set, performance-related info messages will be logged
/// via
/// the regular logging mechanisms. These will consist of mostly timing and
/// debugging information for performance-critical operations.
///
/// Currently performance-related operations are logged as INFO messages.
/// Messages starting with prefix [action]
indicate that an instrumented
/// operation was started (note that its end won't be logged). Messages with
/// prefix [timer]
will contain timing information for operations. Note that
/// no timing information will be logged for operations taking less time than
/// 1 second. This is to ensure that sub-second operations do not pollute
/// logs.
///
/// The contents of performance-related log messages enabled by this option
/// are subject to change in future versions of ArangoDB.
/// @endDocuBlock
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